XJ PARTS CATALOG, SECTION C: FUEL SYSTEM

SECTION C:

FUEL SYSTEM ITEMS: Including Airbox, Carbs, Intakes, Fuel Tanks, Sending Units Petcocks, Gas Caps, Tank Mounts, Etc.

--Introduction.


RICH, LEAN, or possibly even ritually UNCLEAN or OBSCENE: THE CARB REBUILDING FAQ:

Let us begin by warning you: an engine that is out of synch may perform AS IF it has a lean, or a rich, or a hanging idle, or a no-idle, or a run-away idle, or any variety of different conditions------if your engine (carbs) have not been synched, then that at is the #1 issue that you should attend to first, before you even READ any of the guidelines below and go and try to adjust and fiddle with things and change settings THAT AREN'T THE CAUSE OF THE REAL PROBLEM!!

And here are a couple of very good visuals of how a Hitachi or Mikuni CV ("constant velocity") carb actually works. For those of us who are not intimately familiar with these carbs, these videos provide a great basic understanding of what is actually "going on" with your carbs:








Now here is another interesting video: a fully see-thru operational carburetor. Although a lot of it is somewhat tedious to listen to, the video is great demonstration of the basic concepts of how a carb operates, and especially how the fuel becomes “atomized or aerated” (vapourized) by the airflow thru the carb throat (the venturi).

https://www.youtube.com/watch?v=toVfvRhWbj8

However, note that the following items are missing from this basic set-up, and hopefully you’ll be able to visualize where and how the placement of the following items will modify (improve) the behavior of this simplified carb:

- no pilot fuel circuit.
- no replaceable jets to regulate the amount of fuel coming thru the main fuel circuit (or, thru the missing pilot fuel circuit).
- no vacuum piston or attached needle to (also) further regulate (control) fuel flow thru the main fuel circuit (in response to varying vacuum conditions present in the engine)…….this is a lawn tool engine, so basically after start up, it runs at a more-or-less constant speed (rpm’s), as opposed to our engines.
- no emulsion tube with its little holes in the shaft to pre-aerate the fuel mixture coming up thru the main fuel circuit.
- the system shown has a true “choke” system for cold-starting (it “chokes” or closes off the air supply thru the carb), complete with a separate, secondary butterfly valve system. On our engines, the carbs use a “starter” system which operates the same as the main or pilot fuel circuit does, but via a different passage and control mechanism…..no independent butterfly valve, no “choking” off of the air supply, no need to open the throttle valve to increase the airflow thru that closed (“choked”) passageway in the carb……rather, the “starter circuit” on Hitachi and Mikuni carbs simply open and close (via the choke plunger valves) a fully separate source/passagway of fuel from the bowl, and thus let none, a little, or a lot of extra fuel into the carb throat. And please never mind that the label on the left control switch says “CHOKE”…………



Question #1: Why Isn't It Running Right?:

Below is a semi-useful "general rules-of-thumb" list to help you recognize and diagnose fuel-mixture problems.

All of these descriptions assume that the carburetors are cleaned and operating properly, are stock (no jet kit), the valves are adjusted properly, and the engine has been synched.

If any of the above procedures, tasks, actions, or activities have NOT been checked or performed, then do them first, or otherwise all your other efforts will barely even give you "casino odds" at striking it rich and determining what the real cause(s) of your symptoms are......

Here are the 3 rules you should always follow whenever trying to troubleshoot anything:






Typical Symptoms and Causes of a Lean Fuel-Mixture Condition:

- Poor acceleration; the engine feels flat.

- The engine won't respond when the throttle is snapped open, but it picks up speed as the throttle is closed. (A too-large main jet also mimics this symptom.)

- Idle speed falls after you blip the throttle, then creeps back up.

- The engine runs hot, knocks, pings and overheats.

- A lean pilot fuel circuit condition can be responsible for a creeping or "hanging (high) idle", where rpm's are very slow to return to a normal idle speed, is often a sign of being set lean. Conversely, if the idle drops way low and then (maybe) slowly recovers is often a sign of an overly rich condition.

- The engine surges or hunts when cruising at part-throttle.

- Popping or spitting through the carb occurs when the throttle is opened. Or popping and spitting occurs through the pipe on deceleration with a closed throttle.

- The engine runs better in warm weather, worse in cool.

- Performance gets worse when the air filter is removed.

- Fuel levels that are too low will cause a lean condition.

- Pilot fuel circuit that are partially or completely clogged.

- Fuel jets that are too small for your application.

- Pilot mixture screws being set too far "in".

- In cases where an overly lean fuel condition is suspected, the application of a small amount of "choke" may decrease or eliminate the symptoms.

- Here's the main reason you don't want to run lean over an extended period of time:

http://www.xjbikes.com/forums/threads/head-gasket-1982-maxim-650.85273/#post-504365

A holed piston. Notice how it's right where the plug fires (the hottest point anyway, and made ultra-hotter by a lean fuel condition).



Typical Symptoms of a Rich Fuel-Mixture Condition:

- Engine acceleration is flat and uneven and loses that "crisp" feel.

- The engine "eight-strokes" as it loads up and skips combustion cycles.

- The engine's idle is rough or lumpy, and the engine won't return to idle without "blipping" the throttle.

- An overly rich pilot mixture is usually the culprit when the idle drops below normal then slowly recovers.

- The throttle needs to be open continuously to maintain acceleration.

- Black, sooty plugs, a sooty exhaust pipe and black smoke from the tailpipe that stinks of unburned fuel.

- Poor fuel economy.

- The engine works better when cold. Performance falls off as it warms up or the ambient temperature rises.

- Engine performance improves when the air cleaner is removed.

- Fuel levels that are too high will cause a rich condition.

- A choke system that is slightly hung open or has leaky plunger valves. Leaky valves can be determined via a measurement of vacuum using your synch sticks (or vac gauge) --- while watching the gauge, apply a small amount of downward force on the top of the plunger valve. If it vac draw changes, the plunger isn't sealing very well. Over time a small ridge may build up on the tapered brass plunger valve surface (Hitachi carbs) that may be possible to polish out, or a deformity forms on the rubber seals (Mikuni carbs) that may be possible to reform back into shape.

- Fuel jets that are too large for your application.

- Pilot and main FUEL jets being reversed.

- Pilot and main AIR jets being reversed.

- Pilot mixture screws being set too far "out".

- Main jet needle set at too "high" of a position (on some Mikuni models), or that has "risen up" within its head cap (on Hitachi models).

- A simple test for an overly-rich condition is to remove the air filter element, and see if performance improves. A very dirty air filter will cause an overly rich condition, AND, even if the filter was in good condition, the great increase in airflow accomplished by removing the air filter will tend to dilute an overly rich fuel mixture, and thus allow you to focus on determining the cause of that situation.



Some common causes of a high idle:

- Engine has not been synched, as each cylinder "fights" the others for dominance, it can lead to a run-away idle situation.

- A lean air-fuel mixture condition, which can be caused by a variety of problems......vacuum leaks, plugged or too-small fuel jets, etc. Old or "stale" gas may also cause a lean fuel-air mixture to occur temporarily (until the fuel is used up!).

- Mixture screws not properly set or adjusted.

- Vacuum piston sticking or stuck in a partially raised position.

- Idle speed screw set too high, or set to create a "proper" idle speed when the engine was cold (and thus results in a "high idle" once the engine reaches operating temps). The idle speed when the engine is cold should be modulated via the use of the choke (enrichment) control system, rather than cranking the idle speed screw up.

- Butterfly valves opened too far; synch screws out of adjustment.

- Throttle cable wear, adjustment, or throttle lever brackets installed incorrectly or interfering with other nearby objects (cylinder head fins, etc.).

- Choke (enrichment) circuit is stuck "open"....this can occur even if the choke lever is rotated to the fully closed position, if for some reasons the choke plungers are not fully closing (cable wear, cable adjustment, bent finger brackets, or installation problems). In addition, even if the choke plungers are "closing" fully, if the choke plunger valve face or its seat are worn or scarred, this will allow fuel to leak part the plunger and richen the mixture even if the plungers are closed.



Some common causes of a “run-away” idle speed:

If the idle speed starts building and building and eventually “runs-away” to a level that will grenade the engine without you shutting it off:

https://www.xjbikes.com/forums/thre...-no-vacuum-leaks-detected.120948/#post-607986


This is typically caused by an out-of-synch condition:

https://www.xjbikes.com/forums/threads/82-xj-650-startng-problem-surpise.46358/page-2#post-414262


After reading all of the above, you should by now know the solution……….. 



Why your engine seems to be schizoid:

A hanging idle---one that stays high and slowly comes down when decelerating---is a sign of lean mixture. The opposite case, where the idle drops dangerously low then rises, is a sign of rich mixture.

A bike that runs better when hot is probably lean, and a bike that runs better when cold is probably rich.

But sometimes a bike that can be adjusted "just right" when cool, but actually starts exhibiting signs of running lean (hanging idle) as it warms up. And if the idle speed is then re-adjusted while the engine is warm, but eventually falls and the bike dies (especially when sitting at a stop light). Or if the pilot screws are adjusted, then it's too rich when cold---all in direct contradiction of the above observations.

Experience shows that this is a sign of worn throttle shaft seals.....the aluminum carb bodies expand with the heat, but the steel throttle shafts---resting comfortably in a nice cool airflow---don't heat up and therefore don't expand. Once the shaft seals get old and hard, they no longer are able to flex and fill the gap.....so the carb starts drawing air around the shafts, leaning it out.



Why does my engine sometimes backfire when I first turn on the key (without attempting to start the engine)?:

- When you kill the engine, the intakes will still have some remaining (un-burned) air-fuel mixture remaining in them. Upon powering up the bike (turning the key on), the ignition system will apply 12 volts to the coils, thus charging them. Of course, that constant current is not good for the coils, so a few seconds later (if the engine is not started) the TCI shuts down the coils by grounding them (to protect the coils from overheating) which cuts the current to the coils and thus triggers a spark to the plugs. If there is enough un-burned fuel in the intake manifolds or the combustion chambers, and if the valves are held open by the camshafts, a backfire thru the exhaust header and/or thru the intake manifolds/carbs/airbox can result.



Why is my engine hard to start, and using the choke makes no difference?:

Most probably, the starter jets --- which are tiny, and are down inside the carb bowl ---- are plugged up with fuel varnish or the like.



Why does my engine run poorly (or is hard to start) after it is fully warmed up?:

This could be due to leaking throttle shaft seals (where extra seal-to-carb body clearance occurs after the carbs warm up and expand), or, it could point to valve shim clearances that are dangerously tight (the clearances close up after the engine gets fully warmed up).



Why are my plugs carbon-fouled (dry, sooty black deposits)?:

- Carbon fouling is the result of incomplete combustion----for any reason. It is most often associated with an overly rich fuel mixture (whatever the cause), but can also be caused by an overly lean fuel mixture (or poor spark, etc.) In a lean-mixture condition, most of the un-burnt mixture gets pumped out the tailpipe, but some fuel droplets remain in the cylinder and add themselves to the next intake charge. That's not a very precise way of metering the mixture, so when it's finally rich enough for a spark to ignite, that particular charge may be too rich, resulting in incomplete combustion and plug fouling. So carbon-fouled plugs can be due to rich or lean conditions.......your Colortune spark plug will tell you for sure. If you have a light blue or white-ish flame, intermittent flame, and/or intermittent flashes of yellow within an otherwise white-ish flame, then your fuel mixture is too lean.

And by the way.........if the spark that happens to ignite this overly-rich mixture is the "wasted spark" (which occurs in each cylinder at the top of the exhaust stroke, it will occur JUST AS THE INTAKE VALVE IS OPENING ---- so the backfire pressure wave may be directed back up the intake tract!



Why are my plugs oil-fouled (wet, oily black deposits)?:

- worn or broken piston rings, excessive wear or damage to cylinders, *leaking intake valve stem seals.

* while bluish smoke from the exhaust can be caused by worn exhaust valve seals, that situation will not foul your spark plugs. Consider what happens: oil pools above the valve guides, and coats the valve stems every time they rise. These stem "seals" really aren't seals, they are more like wipers, and their function is mainly to wipe off the excess oil from the valve stem. Now, when these stem seals get old and hard, they leave an excess amount of oil on the valve stem, which then drops down into the path of the exhaust gas flow as the valve opens and the oil is evaporated off, leaving blue smoke from the exhaust. But note that none of that oil ever enters the combustion chamber, so it can't foul the plugs.

Of course, any excessive oil coating an intake valve stem will end up going through the cylinder, but intake valve stem seals rarely fail on these engines. Unlike the exhaust valves, which are constantly baked by superheated exhaust gas, the intake valves are bathed in cool and moist (with gasoline) air.



Why is the inside of my carbs covered with a brownish-green goo?:

When fuel mixes with water and sits around for a while, this is the result. Nasty looking, nasty smelling, and you can bet that the tiny passages inside the carb body are plugged solid with this stuff! Definitely time for a full rebuild.......



I have an XJ650 Turbo and......:

Here's a really great discussion on some Turbo fuel system problems, which are even more frustrating than carb problems on all of the other models:

https://www.xjbikes.com/forums/threads/weird-problem-on-my-yamaha-xj650-turbo.130408/#post-664092



What are my fuel levels supposed to be?:

Here's the Holy Grail on this subject:

http://www.xj4ever.com/setting fuel levels.pdf

And here’s a good visual guide to some problems that you might run into:

http://www.xjbikes.com/forums/threads/setting-the-floats-mikuni-not-gettin-any-readings-fixed.40395

and here’s a wonderful video from TurpentyneTV that shows the whole process in excruciating detail:





Fuel Level Cheat Sheet:

Here's the proper fuel-level settings by model when using the "clear-tube" method of measurement:


Hitachi all HSC32 series models:

NOTE: all of the following models used HSC32 carbs:
XJ650 Maxim, Midnight Maxim, XJ650RJ Seca (non-turbo), XJ650 Euro all use HSC32 carbs (various versions)
XJ750 all USA 1981-83 models use HSC32 version 5G200 (Seca) and 15R00 (Maxim and Midnight Maxim)
XJ750 all Canadian 1981-83 models use HSC32 version 5H200 (Seca) and 15T00 (Maxim and Midnight Maxim)
XJ750 UK/Europe 11M models, XJ750 Police models 24L and 37H use HSC32 version 5N100

-Fuel level measured via the clear-tube gauge: 3mm +/- 1mm (.12 +/- .04 inches)

-Float height: 17.5 +/- 0.5mm


Hitachi HSC33 series (XJ700 air-cooled models):

-Fuel level measured via the clear-tube gauge: 1.0mm +/- 1mm (.039" +/- .039")

-Float height: 16.0 +/- 1.0mm


Hitachi HSC33 series (XJ750E-II model):

-Fuel level measured via the clear-tube gauge: 5.0mm +/- 1mm (.197" +/- .039")

-Float height: unknown


Hitachi HSC33 series (XJ750RL models):

-Fuel level measured via the clear-tube gauge: 1.0mm +/- 1mm (.039" +/- .039")

-Float height: unknown, but possibly the same as XJ700 air-cooled models (16.0 +/- 1.0mm)


Mikuni BS28 (all XJ550 except 1984 XJ550L):

-Fuel level measured via the clear-tube gauge: 2mm +/- 1mm (.08 +/- .039 inches)

-Float height: 21.5 +/- 1.0mm


Mikuni BDS26 (USA all 1992-98 XJ600 Seca II):

-Fuel level measured via the clear-tube gauge:
USA: 4 - 6mm (.016 - 0.24”) below float chamber line

-Float height: 6.2 - 8.2mm (0.24 - 0.32”)


Mikuni BDST28 (non-USA all 1992-98 XJ600 Seca II):

-Fuel level measured via the clear-tube gauge:
1992-96 Canada and Australia: 3 - 5mm (0.12 - .0.20”) above float chamber line
1992-95 UK: 3 - 5mm (0.12 - .0.20”) above float chamber line
1996-98 UK: 8.5 - 9.5mm (0.34 - .0.37”) above float chamber line

-Float height:
1992-96 Canada and Australia: 11 - 13mm (0.43 - 0.512”)
1992-95 UK: 11 - 13mm (0.43 - 0.51”)
1996-98 UK: 8.8 - 10.8mm (0.35 - 0.42”)


Mikuni BS32 (all XJ550L, 1984-85 FJ600, and 1984-87 / 1989-91 XJ600):

-Fuel level measured via the clear-tube gauge: 3mm +/- 1mm (.12 +/- .04 inches)

-Float height: unknown


Mikuni BS30 (all XJ650 Turbo):

-Fuel level measured via the clear-tube gauge: 2mm +/- 1mm (.08 +/- .04 inches)

-Float height: 21.0 +/- 0.5mm


Mikuni BS33 (all XJ700-X and XJ750-X):

-Fuel level measured via the clear-tube gauge: 3mm +/- 1mm (.12 +/- .04 inches)

-Float height: 17.5 +/- 1.0mm


Mikuni BS35 (all XJ900RK/RL):

-Fuel level measured via the clear-tube gauge: 5mm +/- 1mm (.20 +/- .04 inches)

-Float height: 22.3 +/- 0.5mm


Mikuni BS36 (all XJ900F, FN, N, etc):

-Fuel level measured via the clear-tube gauge: 5mm +/- 1mm (.20 +/- .04 inches)

-Float height: 22.3 +/- 0.5mm


Mikuni BS34 (all XJ1100 and XS1100):

-Fuel level measured via the clear-tube gauge: 3mm +/- 1mm (.12 +/- .04 inches)

-Float height:
25.7 +/- 1.0mm (1978-79 all models)
23.0 +/- 0.5mm (1980 all models)
not specified (1981-82 all models)



Question #2: What Parts Will I Need?:

The parts you'll need depends on what is there, what is missing, what is worn out, what gets broken or damaged during the dis-assembly process, etc., but the "basic items" needed for the rebuild process (besides any special tools and tuning equipment) is as follows:

- throttle shaft seals (you'll have to split the carbs from the rack to replace these).

- fuel supply tube o-rings (you'll have to split the carbs from the rack to replace these) on the models that use them (some Mikuni carbs do not use these).

- float valve needle and seat rebuild kit (seat, needle, clip, seat washer. The float valve seat filter screens are also available separately). Mikuni owners will also want to replace the float valve seat o-rings.

- float bowl gaskets.

- idle mixture washers & o-rings for sure, and the idle mixture screw springs and mixture screws if they are damaged.

- jets, if damaged or incorrectly sized.

- carb bowl fuel drain screws, if damaged.

- new replacement carb hardware (screws, etc.)---now is the time to upgrade to stainless steel and/or allen-head fasteners if so desired!



From Our Experience:

Since the carburetors are THE most troublesome (and thus most expensive) aspect of these bikes, let me offer a few dozen words and insights about them, their service, and expense:

These carbs are quite simple, mechanically speaking.

The process of making DARNED SURE that you get them unbelievably, positively zestfully clean is a matter of stick-to-it-ness and resisting all attempts to take "shortcuts" or to brush off the tedious aspects of it. Many of the passages in these carbs are tiny, and it's that "tiny-ness" that bites most people, as they don't want to or don't realize the amount of effort that has to be undertaken to deal with such small passages.

If you read through these forums, you'll see many tales of woe of people who are now "cleaning" their carbs for the 2nd, 3rd, or 4th time BEFORE they get it right. The problem is, they never really "cleaned" them correctly the first, 2nd, and 3rd time. After all of the frustration and hassle involved, by the time they get around to the 4th go-around, then they understand that when people who have SUCCESSFULLY rebuilt carbs say things like "you'd better make SURE that you get clear flow through each and every passage, and you'd better polish that piston diaphram bore", etc. aren't just saying that to be over-the-top retentive about their own habits and style of working on these carbs, what they're really doing is issuing an experienced WARNING: do it right, or keep doing it again, and again, and again. And although they're kind of fun little critters to play with, taking them all apart and putting Humpty Carby all back together again, well, it's time better spent on other things.


Think we're kidding? The following thread is a "must read", because the title says it all:

http://xjbikes.com/forums/index.php?threads/17821


One last note: "cleaning" the carbs (internally, not just making them look pretty on the outside) is just one of the small subsets of tasks necessary to the proper REBUILDING of the carbs. I cannot stress this point enough. The use of the term "cleaning" is used as if it were the end goal of the process; in reality, the proper way to think about it would be this:

"A complete and exceptional level of carb CLEANING is a vital and necessary part of the process of properly REBUILDING the carbs."

And what are the other components of the rebuilding puzzle?

a) getting the darned things off the bike! This might help:

http://xjbikes.com/forums/index.php?threads/29695

and

http://www.xjbikes.com/forums/threads/made-a-how-to-video.103484/


b) replacing the worn, missing, or necessary "wear parts" on the carb.


c) Proper "service" work to the carb bodies, especially:

- polishing the piston bore for silky smoothness.
- repair or clean up of any stripped threads in the carb bodies.
- replacement of any damaged or worn parts. In fact, the ability the recognize what is damaged and worn (besides the parts above which are designed to wear out) is the most difficult part of the entire task, since it requires a level of experience: are my needle tips worn? What, exactly, does a worn needle tip look like? How "smooth" is smooth enough? Etc. This is where the advice and experience of the members of this forum are invaluable.


d) Proper "settings" of the various components during re-assembly:
- the fuel levels (float heights).
- the "basic or bench synch" of the throttle valves


e) On-bike "settings":

- first and foremost, the measurement and setting to specifications of the valve train (shim) clearances. Failure to do this "wastes" 90% of your efforts involved with the carbs.
- final synch (using some type of manometer and the YICS tool if your engine is YICS-equipped)
- idle mixture screw setting, preferably using a Colortune plug.


f) A lot of useful "how-to" threads can be found at:

http://xjbikes.com/forums/index.php?threads/27544

and scroll down to the CARBS and FUEL SYSTEM: section........



One last thought about these carbs, since they are THE most troublesome aspects of these bikes, and something to consider:

- the four carbs concept is really neat looking, and is certainly performance-oriented to the extreme.

- for many of us who had lots of experience with automotive carbs, just beware that while these Hitachi and Mikuni carbs are a bit different in operation (and thus parts), a carb is a carb, and they're pretty basic little devices. The main difference is that the fuel circuit passages on these carbs can get bizarrely tiny, especially if you're used to working on automotive carbs (which have canyon-sized fuel passages compared to these carbs).

- like I've said, the cleanliness part is really just tedious work, with a couple of "tricks" thrown into the mix, given the small sizes you're having to deal with. The "rebuild" part is basic mechanical knowledge and skills, knowing which way to turn a screwdriver to loosen vs. tighten, when and how much force to use or not, being organized, stuff like that.

- but the "tuning" part will require some special tools, but no type of any rocket-science knowledge or skills----once you master the rebuild and tuning process with these bikes, you are pretty much a Carb Tuning God, as these carbs are about as "complicated" as it gets with carburetors. I mean, VERY few vehicles have multi-carbs, not until you get to the really high-performance machines level in the automotive world.

- well, as "complicated as it gets" until you start adding pods, etc.----which if you do, I sure hope you've got every last one of the basics listed above down to a science, and you can do it all, properly, and blindfolded, too!

- finally, if you do not have a service manual(s) for your particular bike(s), and you're going to wrench on it and want to do things right, then the only thing I can surmise from such a course of action is:

a) you're already an expert, or.....

b) you aren't really serious about doing things right, and that's okay, too---just don't expect good, quick, or cheap results!



The following guide may save untold hours of frustration and grief:

http://xjbikes.com/forums/index.php?threads/14692

 

SECTION C:

FUEL SYSTEM ITEMS: Including Airbox, Carbs, Intakes, Fuel Tanks, Sending Units Petcocks, Gas Caps, Tank Mounts, Etc.

--Hitachi Parts



HITACHI CARB REBUILD PARTS:

NOTE: Hitachi carbs were originally used on all Yamaha XJ650 models (except Turbo models), all 1981-84 XJ750 models, and all XJ700 (non-"X") models. All other XJ models from this era (XJ550, FJ600, FZ600, YX600, XJ650 Turbo models, XJ700 "X" models, XJ900, XS1100, and XJ1100 models) used Mikuni carbs.

There are two different main types of the Hitachi HSC series carbs used on the XJ-series bikes of this era:

HSC32: used on all 1980-84 XJ650 (except XJ650 Turbo) models and all air-cooled 1981-84 XJ750 models (except for models using the HSC33 series carbs; see below).

HSC33: used on all 1985-86 XJ700 air-cooled engines, 1983 XJ750E-II, 1984 XJ750RL Seca, and Euro XJ750 (41Y models) using Hitachi carbs.

HSC34: used on all 1980-81 XS850 models.

HSC40: used on some XV700, XV750, XJ920, XV1000, and XV1100 models. Note that some later 1980's Virago models changed to using Mikuni carbs.

The "series" number of the carbs refers to the internal diameter of the carb throat (the area where the butterfly valves are) and is expressed in the closest millimeter measurement. Thus the HSC32 series carbs have a 32mm ID throat, and the HSC33 series carbs have a 33mm ID throat, etc.

Original carb bodies are typically marked with an ink stamping that identifies the intended use of the carbs......for example, the 1982-83 XJ650 Maxim carbs (US models) would have an ink stamping that reads "5N800", while the XJ650 Maxim carbs (Canadian models) carbs would be inked as "5N900", while the 1981-83 XJ750 Seca (USA) carbs are inked "5G200", etc. This ink stamp could have been on the carb bodies, or on the sides or bottom of the bowls......and, after 20+ years and a number of carb cleaning efforts, are probably long gone.

Different series of Hitachi carbs can be quite difficult to properly identify from one another, and Hitachi carbs were also used on other manufacturer model bikes, and while even the same "series" of Hitachi carbs may have been used on, say, a certain Kawasaki model bike, the internal jetting, valving, and other design elements (choke actuation method, etc.) typically renders such carbs as "similar but different enough" to not be directly (or even indirectly!) interchangeable with the proper Yamaha version carbs for a particular model.

Please note that although the HSC33 series carbs are very similar in design and appearance to the HSC32 series, and although many parts do interchange between these two different series of carbs, the HSC33 carbs are different in some key components and in their physical size (the throats are bigger, the carb spacing is wider, and the entire rack of carbs is slightly longer than the HSC32's). It may be difficult, if not impossible, to properly swap the HSC32 and HSC33 carb racks between bikes due to these differences.



NOTE: "OEM" refers to an original Yamaha factory part, whereas "Replacement" or "Aftermarket" refers to a part not made by Yamaha or one of their original suppliers. Note that an "OEM" part may be made by Yamaha's original supplier, even though such part is no longer serviced through the Yamaha factory parts system.


j1) XJ models Hitachi HSC32/HSC33 USED PARTS.....jets, bowls, bodies, diaphragms/slides, floats, brackets, screws, etc. We may have some good used items that you need, let me know what specific parts you're looking for.



HITACHI CARB UPPER END PARTS:

NOTE: fuel jets, air jets, float valves, and main jet needles are located in the section "LOWER END PARTS" further below.


THROTTLE SHAFT REBUILD PARTS:

Throttle Shaft Seals:

aaa) OEM and aftermarket Hitachi HSC32/33/40 series carb THROTTLE SHAFT SEALS...these are the seals on the outside of the carb body that the throttle shaft passes through. Uses 2 per carb, but without taking the carbs apart from their rack, the only ones you can replace are the outer-most seals on the end carbs. These seals will fit almost all stock Hitachi carbs used in the 1980-and 90’s models, including all XJ650, all XJ700, and all XJ750 models, as well as 1980-81 XS850 engines and various 1984-87 XV700, 1981-83 and 1988 XV750, 1981-83 XV920, 1984-85 XV1000, 1986-87 XV1100, 1983-85 XVZ12, 1983 XVZ1300, 1986-90 XVZ13, and 1985-86 and many 1989-up VMX12 V-Max models which use Hitachi carbs.

The aluminum-bodied carbs, when heated by conduction from the engine, tend to expand more quickly and by a greater amount than the air-cooled steel throttle shafts.

Thus as these shaft seals wear and harden, they can't always maintain a vacuum-tight seal in all conditions, resulting in a lean running condition once the engine is warmed up----even though they "seal" perfectly well at idle, or when the carb bodies are still cool. If the pilot screws are adjusted with the bike partially warmed up, it may appear to be richer than necessary when cool, and then running lean when hot, resulting in an incredibly confusing and frustrating situation to diagnose and remedy.

These V-shaped seals are installed with their open “face” facing away from the carb throat. The OEM seals (HCP6838B) have one open face and one closed face, while the aftermarket HCP38B seals are like the original-installed seals, and have an “open” face on both sides (and thus for the HCP38B seals, it does not matter in which direction they are installed!).

An excellent write-up on the process required to take the carbs apart fully and replace these seals can be reviewed at:

http://www.xj4ever.com/hitachi throttle shaft seals.pdf


HCP6838B OEM Hitachi throttle shaft SEAL, each:
$ 7.95

HCP6838BSET2 OEM Hitachi throttle shaft SEALS, pair:
$ 15.95

HCP6838BSET4 OEM Hitachi throttle shaft SEALS, set of 4:
$ 29.95

HCP6838BSET6 OEM Hitachi throttle shaft SEALS, set of 6:
$ 43.95

HCP6838BSET8 OEM Hitachi throttle shaft SEALS, set of 8:
$ 57.95



HCP38B Aftermarket Hitachi throttle shaft SEAL, each:
$ 7.95

HCP38BSET2 Aftermarket Hitachi throttle shaft SEALS, pair:
$ 14.95

HCP38BSET4 Aftermarket Hitachi throttle shaft SEALS, set of 4:
$ 27.95

HCP38BSET6 Aftermarket Hitachi throttle shaft SEALS, set of 6:
$ 39.95

HCP38BSET8 Aftermarket Hitachi throttle shaft SEALS, set of 8:
$ 49.95



We recommend the use of silicone grease when installing any of these seals:

HCP28407 Aftermarket o-ring, oil seal, and gasket installation pure SILICONE GREASE. This small 5-gram (1/6-oz) snap-open "pillow packet" is enough for a few small oil seals, dozens of o-rings, and the like. Each:
$ 4.95

HCP1714 Aftermarket o-ring, oil seal, and gasket installation pure SILICONE GREASE. This generous 14-gram (1/2-oz.) tub goes a long way, because just like Brylcreem, "just a little dab will do ya'!" Each:
$ 9.95


>>>> An even better idea is to order one of our "chemical kits" below:

Carb Rebuild Chemicals Kit:

Upgrade your carb rebuild kit order with our CARB REBUILD CHEMICALS KIT which contains the extra “tools” you’ll need to do a more complete and professional job. Each kit contains the following items….and yes, we know that the screwdriver bits aren’t really “chemicals”, but you’ll need them, too!

- a packet of our HCP28407 silicone grease…contains enough grease to do the throttle shaft seals, the choke plunger caps, the fuel supply tube o-rings, and --- if you’re not wasteful --- a thin smear for the bowl gaskets or bowl o-rings.

- a packet of the HCP29921 aluminum anti-seize paste…..for use on all fasteners (and bowl drain screws!) besides the carb rack screws or butterfly valve screws, which should use a thread-locking fluid instead:

- a tube of the HCP24844 low-strength thread-locker fluid, used on the carb rack screws and the butterfly valve screws.

- a bottle of the HCP8540 rubber RnR fluid,to be used on the vacuum piston diaphrams to keep them soft and flexible.

- a set of the HCP28226 complete JIS screwdriver bits set, which contains a complete set of short and long bits: one each of the #0, #1, #2, and #3 short (1”) bits, and one each of the #2 and #3 size long (3”) bits. These bits fit into a standard 1/4” bit holder.

HCP29920 Aftermarket CARB REBUILD CHEMICALS KIT, for use on all Hitachi and Mikuni carbs.
$ 39.95



NOTE: the following product(s) can only be shipped via ground transport (which thus eliminates the postal Priority Mail, postal Express Mail, or private carrier Expedited levels of service for this item) and cannot (and will not----don't even ask!) be shipped outside of the continental USA. Additionally, there may be a per-package weight or quantity restriction, and thus multiple-unit orders of this product may have to be shipped in separate packages and will incur additional shipping charges.

HCP20861 Aftermarket industrial-strength SILICONE LUBE, in a large 16-ounce aerosol can. Concentrated silicone sprays on wet, and then dries to a super-slick, clear, non-greasy, non-staining finish. Resists moisture, stops squeeks, prevents binding on all types of surfaces (wood, metal, plastic, rubber, even fabrics). Won't wash away, protect against rust and corrosion, stable from -100 degrees up to 500-F. This fluid is also a great choice for use as installation lubricant for o-rings, oil seals, etc. (similar to our HCP1714 or HCP28407 silicone grease paste) or wherever petroleum-based lubricants are not recommended.
$ 24.95



COMMENTARY: These seals are a VERY common source of vacuum leaks into the carbs, making tuning (synch, colortune, etc.) somewhere between very difficult and next-to-impossible. And here's the dirty little secret that no one really talks about:

If you read through these boards often and enough---or any other websites or lists devoted to these XJ bikes----you'll find a common theme in regards to these bikes, and it goes something like this:

"My bike doesn't run right."

And 9 times out of 10, it's due to a carb problem. And to make matters worse, these bikes don't just use one carb, they use four, which means that the synchronization of the four carbs to each other is critical in order for them to perform properly.

And 95% of the problems with the carbs is this: they are dirty (more like filthy!) inside due to age, and these seals are worn out. But to replace these seals (and also to properly get the insides of the carbs absolutely, positively, ZESTFULLY clean), you're gonna have to pull the carb rack apart. Although that task is not mechanically difficult....nor does it take any special tools to do it.....the re-assembly process will MERCILESSLY PUNISH the careless or impatient mechanic or hobbyist. A tremendous attention to detail and organization is needed before you begin to take these carbs apart, so that you will have all the proper notes, drawings, sketches, etc. to put humpty-dumpty back together again, properly.

Since most people lack those skills or discipline, you will find most of the experienced experts on the various boards and forums telling you to NOT take the carbs apart, and to forego the proper cleaning and parts replacement steps needed.

I'm not trying to tell you to do, or not to do the task properly yourself; all I can tell you is what my own personal experience is. If you have the proper tools, time, and organizational skills and the PATIENCE to do the job right, breaking a rack apart and doing the job properly isn't that difficult. If you don't, it's a nightmare.

And the other dirty little secret is this: before you can synch and tune your carbs properly, you MUST check and adjust your valve clearances (replace worn valve shims), or all the synching and colortuning in the world isn't going to give you optimal results.

Sorry to be the bearer of such bad news, but as always, the truth will set you free (or at least solve most of your tuning and performance issues!).

Luckily, all of the parts and special tools needed to perform a proper tune up ARE available. I guess we should appreciate the little things in life more than we usually do........


We also strongly recommend the purchase of a new set of throttle shaft butterfly retaining screws, as it is very common to strip the heads out of the original screws while removing them. Replacement screws are listed further below.

Also, you may find it next-to-impossible to properly remove the original screws without using the proper JIS-style screwdriver. Typical "phillips-drive" style screwdrivers do not have the proper tip design to engage the slots on JIS-specifications screws (which all screws on Japanese bikes are) and tend to very easily strip out the screw heads. We offer complete sets of various sized JIS screwdrivers, but those people wanting only the correct size screwdriver for these throttle shaft screws should order the HCP28214 (size #2) screwdriver:


JIS Screwdrivers:

mt1) Almost every screw on these bikes are "JIS" design screws, JIS standing for Japanese Industrial Standards, and both the depth and design on the phillips-head "slot" is different than typical US slots. In a nutshell, JIS screws (which can be easily identified by the small punched single "dot" on the screw head, in-between two of the screw slots) have both deeper and "squarer" slots and thus can hold more torque than their rest-of-the-world counterparts. They also require a JIS screwdriver to take full advantage of, and to prevent rounding out the slots as typical phillips screwdrivers will do. The more "rounded" edges of a standard phillips-drive screwdriver cannot exert as much torque on the screw head (by design, actually) and will "cam-out" of the slots, taking some of the slot material with it.....and then you have what is affectionately known as a !!#&$!?**#! stripped out screw head!

So it might be a good idea to also invest in a set of quality JIS screwdrivers; trust me, they make a difference (and yes, they can be used on standard phillips-drive screws, too).

We offer these tools in three different quality grades and styles to meet your particular needs:

* Standard-Grade screwdrivers are a low-cost alternative that do a fine job in light-duty use.
* Mechanics-grade screwdrivers are a heavy-duty design and is recommended for the typical home mechanic or shop.
* Impact-grade screwdrivers feature a hardened “head” and an internal cam-drive that rotates the shaft about 12-degrees when struck by a hammer -----similar to the operation of an impact driver, but in a much more useful form. These drivers look, feel, and operate just like a mechanic-grade screwdriver above, but can also be given a sturdy “whack!” to help persuade frozen fasteners to give up their grip. Highly recommended when working on the carbs (the upper and lower rack bracket screws are a beast to remove without an impact driver ) or in any number of other situations when working on seized or rusted fasteners.


Basic JIS Screwdriver Sets:

HCP21127 Aftermarket JIS-standards STANDARD-GRADE SCREWDRIVER SET. This set of 3 drivers contains one each of standard-length #1, #2, and #3 size phillips-drive, JIS-standard screwdrivers, and this range of sizes will handle everything down to an M2 sized screw (that's tiny, smaller than the size of the petcock faceplate mounting screws) all the way up to the biggest screws commonly used on these bikes. These standard-grade screwdrivers all feature a comfortable gel-covered handle, black-chrome plated steel shafts, and magnetized drive tips.
$ 52.95

HCP17479 Aftermarket JIS-standards MECHANICS-GRADE SCREWDRIVER SET. This set of 3 drivers contains one each of standard-length #1, #2, and #3 size phillips-drive, JIS-standard screwdrivers, and this range of sizes will handle everything down to an M2 sized screw (that's tiny, smaller than the size of the petcock faceplate mounting screws) all the way up to the biggest screws commonly used on these bikes. These mechanics-grade screwdrivers all feature sturdy comfort-grip handles, chrome plated steel shafts, and magnetized drive tips.
$ 59.95

HCP23604 Aftermarket JIS-standards MECHANICS-GRADE SCREWDRIVER BITS SET. This set of 4 driver bits contains one each of 1/4” hex-drive bits in the #0, #1, #2, and #3 size phillips-drive, JIS-standard screwdriver bits, and this range of sizes will handle everything down to an M1 sized screw (that's tiny, smaller than the size of the petcock faceplate mounting screws) all the way up to the biggest screws commonly used on these bikes. These mechanics-grade screwdriver bits are approximately 1” long and are designed to be used in a 1/4” bit holder or similar..
$ 21.95



Carb Rebuild Screwdriver Sets:

HCP21183SET Aftermarket JIS-standard MECHANICS-GRADE SCREWDRIVER SET. This set of 3 drivers contains one each of the standard-length #2 and #3 size phillips-drive, JIS-standard screwdrivers, and a stubby straight-blade screwdriver that properly fits the pilot mixture screw slot. This range of sizes will handle everything down to an M3 sized screw all the way up to the largest screws found on the carbs. These mechanics-grade screwdrivers all feature sturdy comfort-grip handles, chrome plated steel shafts, and magnetized drive tips.
$ 64.95

HCP21184SET Aftermarket JIS-standard IMPACT-GRADE SCREWDRIVER SET. This set of 3 drivers contains one each of the standard-length #2 and #3 size phillips-drive, JIS-standard impact screwdrivers, and a stubby straight-blade screwdriver that properly fits the pilot mixture screw slot. This range of sizes will handle everything down to an M3 sized screw all the way up to the largest screws found on the carbs. These mechanics-grade screwdrivers all feature sturdy comfort-grip handles, knurled chrome plated steel shafts, and “sure-grip” textured, magnetized drive tips. The inclusion of the impact drivers can make the breakdown of the carb rack much easier.
$ 84.95


Fuel System Service Screwdriver Sets:

These sets are the same as the Carb Rebuild Sets above, but also include the #1 sized phillips-drive JIS-tip screwdriver that will be useful when servicing the petcock.

HCP21185SET Aftermarket JIS-standards MECHANICS-GRADE SCREWDRIVER SET. This set of 4 drivers contains one each of the standard-length #1, #2, and #3 size phillips-drive, JIS-standard screwdrivers, and a stubby straight-blade screwdriver that properly fits the pilot mixture screw slot. This range of sizes will handle everything down to an M3 sized screw all the way up to the largest screws found on the carbs. These mechanics-grade screwdrivers all feature sturdy comfort-grip handles, chrome plated steel shafts, and magnetized drive tips.
$ 74.95

HCP21186SET Aftermarket JIS-standards IMPACT-GRADE SCREWDRIVER SET. This set of 4 drivers contains the standard-length #1 phillips-drive, JIS-standard screwdriver, one each of the #2, and #3 size phillips-drive JIS-tip impact screwdrivers, and a stubby straight-blade screwdriver that properly fits the pilot mixture screw slot. This range of sizes will handle everything down to an M3 sized screw all the way up to the largest screws found on the carbs. These mechanics-grade screwdrivers all feature sturdy comfort-grip handles, knurled chrome plated steel shafts, and “sure-grip” textured, magnetized drive tips. The inclusion of the impact drivers can make the breakdown of the carb rack much easier.
$ 92.95


Full Service Screwdriver Sets:

HCP21187SET Aftermarket JIS-standards MECHANICS-GRADE SCREWDRIVER SET. This set of 6 drivers contains a set of standard-length of the #1, #2, and #3 size phillips-drive, JIS-standard screwdrivers, one each of the stubby #1 and #2 size phillips-drive JIS-tip screwdrivers, and a stubby straight-blade screwdriver that properly fits the pilot mixture screw slot. This range of sizes will handle everything down to an M3 sized screw all the way up to the largest screws found on the carbs. These mechanics-grade screwdrivers all feature sturdy comfort-grip handles, chrome plated steel shafts, and magnetized drive tips.
$ 114.95

HCP21188SET Aftermarket JIS-standards IMPACT-GRADE SCREWDRIVER SET. This set of 6 drivers contains a standard-length #1 JIS-tip screwdriver, one each of the #2 and #3 size phillips-drive, JIS-standard impact drivers, one each of the stubby #1 and #2 size phillips-drive, JIS-standard screwdrivers, and a stubby straight-blade screwdriver that properly fits the pilot mixture screw slot. This range of sizes will handle everything down to an M3 sized screw all the way up to the largest screws found on the carbs. These mechanics-grade screwdrivers all feature sturdy comfort-grip handles, knurled chrome plated steel shafts, and “sure-grip” textured, magnetized drive tips. The inclusion of the impact drivers makes the removal of stuck or seized fasteners much easier and more convenient. With this set you can rule the world in style!
$ 134.95



Individual JIS-standards Screwdrivers:

The #2 and #3 size phillips-drive screwdrivers fit the most commonly used size screws on the carbs, gauge clusters, etc.

HCP21181 Aftermarket straight-blade STUBBY SCREWDRIVER, short 1” shaft length, modified to properly fit the pilot mixture screw slotted head.
$ 19.95

HCP21130 Aftermarket size #1 JIS-standards STUBBY SCREWDRIVER, for m2-m4 sized screws, short 1” shaft length.
$ 19.95

HCP21131 Aftermarket size #2 JIS-standards STUBBY SCREWDRIVER, for m3-m5 sized screws, short 1” shaft length.
$ 21.95



HCP5900 Aftermarket size #1 JIS-standards SCREWDRIVER, for m2-m4 sized screws, standard 3” shaft length.
$ 19.95

HCP28214 Aftermarket size #2 JIS-standards SCREWDRIVER, for m3-m5 sized screws, standard 4” shaft length.
$ 21.95

HCP5902 Aftermarket size #3 JIS-standards SCREWDRIVER, for m6-m8 sized screws, standard 6” shaft length.
$ 24.95

HCP5903 Aftermarket size #4 JIS-standards SCREWDRIVER, for m8-up sized screws, standard 8” shaft length.
$ discontinued



HCP21135 Aftermarket size #2 JIS-standards IMPACT SCREWDRIVER, for m3-m5 sized screws, standard 4” shaft length.
$ 34.95

HCP21136 Aftermarket size #3 JIS-standards IMPACT SCREWDRIVER, for m6-m8 sized screws, standard 6” shaft length.
$ 36.95



HCP23600 Aftermarket size #0 JIS-standards SHORT SCREWDRIVER BIT , for m2 and smaller size screws. This 1” long bit fits in any standard 1/4” bit holder.
$ 5.95

HCP23601 Aftermarket size #1 JIS-standards SHORT SCREWDRIVER BIT , for m2-m4 size screws. This 1” long bit fits in any standard 1/4” bit holder.
$ 7.95


HCP23602 Aftermarket size #2 JIS-standards SHORT SCREWDRIVER BIT , for m3-m5 size screws. This 1” long bit fits in any standard 1/4” bit holder.
$ 5.95

HCP28218 Aftermarket size #2 JIS-standards LONG SCREWDRIVER BIT , for m3-m5 size screws. This 3” long bit fits in any standard 1/4” bit holder.
$ 7.95


HCP23603 Aftermarket size #3 JIS-standards SHORT SCREWDRIVER BIT, for m6-m8 size screws. This 1” long bit fits in any standard 1/4” bit holder.
$ 5.95

HCP28220 Aftermarket size #3 JIS-standards LONG SCREWDRIVER BIT, for m6-m8 size screws. This 3” long bit fits in any standard 1/4” bit holder.
$ 7.95



HCP28224 Aftermarket JIS-standards SHORT SCREWDRIVER BITS SET, contains one each of the #0, #1, #2, and #3 size short (1” long) bits.
$ 19.95

HCP28225 Aftermarket JIS-standards LONG SCREWDRIVER BITS SET, contains one each of the #2 and #3 size (3” long) bits.
$ 16.95

HCP28226 Aftermarket JIS-standards COMPLETE SCREWDRIVER BITS SET, contains a complete set of short and long bits: one each of the #0, #1, #2, and #3 short bits, and one each of the #2 and #3 size long bits.
$ 32.95




Throttle Shaft Hardware:

v5) Aftermarket Hitachi throttle shaft BUTTERFLY VALVE MOUNTING SCREW. Each round aluminum butterfly "valve" is held to the steel throttle shaft via two tiny phillips head screws. The throttle shaft has self-locking threads which makes the removal of these screws both a chore and usually results in a buggered phillips head slot. These replacement screws come in a variety of materials and drive styles. Use 2 per carb on all XJ650 (except Turbo), XJ700 air-cooled, XJ750 air-cooled, 1980-81 XS850, 1984-87 XV700, 1981-83 XV750, 1981-83 XV920, 1984-85 XV1000, and 1986-87 XV1100 Virago carbs.

And if you’re so unfortunate to have buggered the threads on the shaft, you might be able to rescue the threads on the throttle shafts by re-tapping the holes with this tap:

HCP6336 THREAD CHASER AND CLEAN-UP TAP, made from a high-speed uncoated steel. For the following holes:
- all Hitachi and Mikuni throttle shafts where the butterfly valve screw on
- all models petcock faceplate mounting screw holes.
$ 9.95

HCP28170 Aftermarket thread tap or EZ-out extractor TAP HANDLE, featuring offset tap handles and fully adjustable head for all m3-m12 size taps and size 0 to ½” extractors. This is the proper way to hold a tap or extractor to insure that the force is directed straight down and doesn’t “wobble” as you are cutting, reaming, or extracting. Much better than using pliers or vise-grips to hold the tool……..
$ 17.95


If the threads are too damaged, then we offer these problem-solver kits that contain a longer screw and special ultra-thin nut:

HCP26994SET Aftermarket Hitachi butterfly valve “problem-solver” MOUNTING SCREW & NUT SET, panhead 18-8 stainless steel screw, phillips-drive. This longer-than-stock screw and matching thin nut allows you to salvage a throttle shaft which has damaged, stripped, or missing threads…..the longer reach of the threads clears the back side of the throttle shaft and allows the nut to secure the valve to the shaft. NOTE the threads in the throttle shaft should be drilled out using our HCP26993 oversize drill bit, to remove any damaged threads and to slightly enlarge the hole, allowing the replacement screw to pass through the throttle shaft without engaging the shaft. NOTE: you must use thread-locking fluid HCP1266 when installing this fastener! For use on Hitachi carbs as used on all XJ650 (except Turbo), XJ700 air-cooled, XJ750 air-cooled, 1980-81 XS850, 1984-87 XV700, 1981-83 XV750, 1981-83 XV920, 1984-85 XV1000, and 1986-87 XV1100 Virago models. This set contain one screw and one nut, enough to repair one damaged hole. You will need to order 2 sets to repair both holes in a single throttle shaft.
$ 2.95

HCP26994SET8 Aftermarket Hitachi butterfly valve “problem-solver” MOUNTING SCREW & NUT SETS, panhead 18-8 stainless steel screw, phillips-drive. Contains 8 screws and 8 nuts.
$ 14.95


HCP26993 Aftermarket throttle shaft screw OVERSIZE DRILL BIT allows you to remove damaged threads and slightly enlarge the screw hole in damaged throttle shafts so that our problem-solver screws can be used. 1/8” shank. For use with all Mikuni and Hitachi models.
$ 9.95


HCP24844 Low Strength THREAD LOCKER FLUID, 2ml tube. This is a semi-permanent formula that provides moderate vibration-loosening resistance, while still allowing for easy disassembly of the fastener with hand tools. This formula is recommended for upper and lower carb rack mount screws and the butterfly valve-to-throttle shaft retaining screws. A little bit goes a long way.......
$ 7.95



HCP26994KIT Aftermarket Hitachi butterfly valve “problem-solver” MOUNTING SCREW & NUT SETS, contains 8 of the HCP26991 screw and nut sets, a tube of the HCP24844 low-strength locker fluid, and the HCP26993 drill bit. This kit has enough parts to repair 8 damaged shaft holes..
$ 24.95



the following screws are for use on throttle shafts with undamaged threads:

Unless you have reasons for doing otherwise, we recommend upgrading the butterfly valve retaining screws to the 18-8 stainless steel HCP2561 button head hex-key style-----they are more durable than stock phillips headed plain steel, and much easier to remove in the future if the need ever arises. NOTE: SAE style panhead screws are standard-design phillips-drive fasteners, while the JIS type panhead screws are Japanese Industrial Standard design screws, which use a JIS drive (a better design than a true "phillips" cross), and are what was used originally on these carbs. Besides the difference in the drive slot, JIS screws are smaller in head diameter and in head height.


The following screws are correct for these models using the HSC32 or HSC33 series carbs: XJ650 all (except Turbo) modelss, XJ700 air-cooled models, and all XJ750 air-cooled models. Use 2 per carb

HCP1347 Aftermarket Hitachi butterfly valve retaining SCREWS, SAE panhead alloy steel phillips-drive screw, each:
$ 1.95

HCP1347SET2 Aftermarket Hitachi butterfly valve retaining SCREWS, SAE panhead alloy steel phillips-drive screw, set of 2:
$ 2.95

HCP1347SET4 Aftermarket Hitachi butterfly valve retaining SCREWS, SAE panhead alloy steel phillips-drive screw, set of 4:
$ 5.75

HCP1347SET8 Aftermarket Hitachi butterfly valve retaining SCREWS, SAE panhead alloy steel phillips-drive screw, set of 8:
$ 10.95



HCP14241 Aftermarket Hitachi butterfly valve retaining SCREWS, JIS panhead alloy steel phillips-drive screw, each:
$ 2.95

HCP14241SET2 Aftermarket Hitachi butterfly valve retaining SCREWS, JIS panhead alloy steel phillips-drive screw, set of 2:
$ 4.95

HCP14241SET4 Aftermarket Hitachi butterfly valve retaining SCREWS, JIS panhead alloy steel phillips-drive screw, set of 4:
$ 9.75

HCP14241SET8 Aftermarket Hitachi butterfly valve retaining SCREWS, JIS panhead alloy steel phillips-drive screw, set of 8:
$ 17.95



HCP1348 Aftermarket Hitachi butterfly valve retaining SCREW, SAE panhead 18-8 stainless steel phillips-drive screw , each:
$ 2.95

HCP1348SET2 Aftermarket Hitachi butterfly valve retaining SCREWS, SAE panhead 18-8 stainless steel phillips-drive screw, set of 2:
$ 4.95

HCP1348SET4 Aftermarket Hitachi butterfly valve retaining SCREWS, SAE panhead 18-8 stainless steel phillips-drive screw, set of 4:
$ 9.75

HCP1348SET8 Aftermarket Hitachi butterfly valve retaining SCREWS, SAE panhead 18-8 stainless steel phillips-drive screw, set of 8:
$ 17.95



HCP14242 Aftermarket Hitachi butterfly valve retaining SCREW, JIS panhead 18-8 stainless steel phillips-drive screw, JIS phillips drive slot, each:
$ 3.95

HCP14242SET2 Aftermarket Hitachi butterfly valve retaining SCREWS, JIS panhead 18-8 stainless steel phillips-drive screw, set of 2:
$ 6.95

HCP14242SET4 Aftermarket Hitachi butterfly valve retaining SCREWS, JIS panhead 18-8 stainless steel phillips-drive screw, set of 4:
$ 12.95

HCP14242SET8 Aftermarket Hitachi butterfly valve retaining SCREWS, JIS panhead 18-8 stainless steel phillips-drive screw, set of 8:
$ 24.95



HCP1349 Aftermarket Hitachi butterfly valve retaining SCREW, low-profile hex-drive sockethead screw made from 18-8 stainless steel, each:
$ 2.95

HCP1349SET2 Aftermarket Hitachi butterfly valve retaining SCREWS, low-profile hex-drive sockethead screw made from 18-8 stainless steel, set of 2:
$ 4.95

HCP1349SET4 Aftermarket Hitachi butterfly valve retaining SCREWS, low-profile hex-drive sockethead screw made from 18-8 stainless steel, set of 4:
$ 9.75

HCP1349SET8 Aftermarket Hitachi butterfly valve retaining SCREWS, low-profile hex-drive sockethead screw made from 18-8 stainless steel, set of 8:
$ 17.95



HCP2561 Aftermarket Hitachi butterfly valve retaining SCREW, low-profile hex-drive buttonhead screw made from 18-8 stainless steel, each:
$ 2.95

HCP2561SET2 Aftermarket Hitachi butterfly valve retaining SCREWS, low-profile hex-drive buttonhead screw made from 18-8 stainless steel, set of 2:
$ 4.95

HCP2561SET4 Aftermarket Hitachi butterfly valve retaining SCREWS, low-profile hex-drive buttonhead screw made from 18-8 stainless steel, set of 4:
$ 9.75

HCP2561SET8 Aftermarket Hitachi butterfly valve retaining SCREWS, low-profile hex-drive buttonhead screw made from 18-8 stainless steel, set of 8:
$ 17.95



The following screws are correct for these models using the HSC34 or HSC40 series carbs: 1980-81 XS850, 1984-86 XV700 Virago, 1981-83 XV750 Virago, 1981-83 XV920 Virago, 1984-85 XV1000 Virago, and 1986-87 XV1100 Virago. Use 2 per carb.

HCP104 OEM Hitachi butterfly valve MOUNTING SCREW, yellow zinc-plated alloy steel, panhead, phillips-drive screw, each:
$ 2.95

HCP104SET2 OEM Hitachi butterfly valve MOUNTING SCREWS, yellow zinc-plated alloy steel, panhead, phillips-drive screw, set of 2:
$ 5.75

HCP104SET4 OEM Hitachi butterfly valve MOUNTING SCREWS, yellow zinc-plated alloy steel, panhead, phillips-drive screw, set of 4:
$ 9.95

HCP104SET6 OEM Hitachi butterfly valve MOUNTING SCREWS, yellow zinc-plated alloy steel, panhead, phillips-drive screw, set of 6:
$ 14.95



HCP2907 Aftermarket Hitachi butterfly valve MOUNTING SCREW, zinc-plated alloy steel, panhead, phillips-drive screw, each:
$ 1.50

HCP2907SET2 Aftermarket Hitachi butterfly valve MOUNTING SCREWS, zinc-plated alloy steel, panhead, phillips-drive screw, set of 2:
$ 2.75

HCP2907SET4 Aftermarket Hitachi butterfly valve MOUNTING SCREWS, zinc-plated alloy steel, panhead, phillips-drive screw, set of 4:
$ 4.95

HCP2907SET6 Aftermarket Hitachi butterfly valve MOUNTING SCREWS, zinc-plated alloy steel, panhead, phillips-drive screw, set of 6:
$ 6.95



HCP105 Aftermarket Hitachi butterfly valve MOUNTING SCREW, 18-8 bright stainless steel, panhead, phillips-drive screw, each:
$ 2.50

HCP105SET2 Aftermarket Hitachi butterfly valve MOUNTING SCREWS, 18-8 bright stainless steel, panhead, phillips-drive screw, set of 2:
$ 4.50

HCP105SET4 Aftermarket Hitachi butterfly valve MOUNTING SCREWS, 18-8 bright stainless steel, panhead, phillips-drive screw, set of 4:
$ 8.95

HCP105SET6 Aftermarket Hitachi butterfly valve MOUNTING SCREWS, 18-8 bright stainless steel, panhead, phillips-drive screw, set of 6:
$ 12.95



HCP2908 Aftermarket Hitachi butterfly valve MOUNTING SCREW, black oxide coated alloy steel, panhead, phillips-drive screw, each:
$ 1.50

HCP2908SET2 Aftermarket Hitachi butterfly valve MOUNTING SCREWS, black oxide coated alloy steel, panhead, phillips-drive screw, set of 2:
$ 2.75

HCP2908SET4 Aftermarket Hitachi butterfly valve MOUNTING SCREWS, black oxide coated alloy steel, panhead, phillips-drive screw, set of 4:
$ 4.95

HCP2908SET6 Aftermarket Hitachi butterfly valve MOUNTING SCREWS, black oxide coated alloy steel, panhead, phillips-drive screw, set of 6:
$ 6.95



ts5) Hitachi HSC32 and 33 series carb THROTTLE SHAFT RETAINER E-CLIP...these shaft retainer clips go directly "outside" of the plastic shim washers listed above on the #1 and #4 carbs only. Used on all XJ650 except Turbo, all XJ700 non-X, all XJ750 air-cooled, and all Virago models using HSC40 series carbs.


HCP6836 OEM Hitachi throttle shaft end retaining E-CLIP, bright plated spring steel, each:
$ 7.95

HCP6836SET2 OEM Hitachi throttle shaft end retaining E-CLIPS, set of 2:
$ 14.95


HCP905 Aftermarket Hitachi throttle shaft end retaining E-CLIP, black-phosphate coated spring steel as original, each:
$ 4.95

HCP905SET2 Aftermarket Hitachi throttle shaft end retaining E-CLIPS, set of 2:
$ 8.95


HCP2909 Aftermarket Hitachi throttle shaft end retaining E-CLIP, type 420 stainless spring steel, each:
$ 6.95

HCP2909SET2 Aftermarket Hitachi throttle shaft end retaining E-CLIPS, set of 2:
$ 12.95




bbb) Aftermarket Hitachi HSC32/33 series carb THROTTLE SHAFT SEAL PLASTIC SHIM WASHER...these washers go directly "outside" of the HCP6838B or the HCP38B shaft seals listed above. Same notes as listed above about the seals (regarding the ease of replacement) also applies to these shims. NOTE: although these shims do not "wear out" like the seals do, you should replace them if your washers are cracked, broken or missing.

On the HSC32, carbs #1, #2, and #4 use 2 shims per carb, and the #3 carb uses only 1 shim. Thus, on HSC32 model carbs, there are a total of 7 shims used per entire carb rack.

On HSC33 models, carbs #1 and #4 used 2 shims per carb, the #2 carb uses only 1 shim, and the #3 carb uses none of these shims. Thus on HSC33 model carbs, there are a total of 5 shims used per entire carb rack.

The HSC40 series carbs use 2 per carb, or a total of 4 per engine.


HCP3991 Aftermarket Hitachi throttle shaft seal SHIM WASHER, each:
$ 4.95

HCP3991SET2 Aftermarket Hitachi throttle shaft seal SHIM WASHERS, pair:
$ 8.95

HCP3991SET4 Aftermarket Hitachi throttle shaft seal SHIM WASHERS, set of 4 shims:
$ 16.95

HCP3991SET5 Aftermarket Hitachi throttle shaft seal SHIM WASHERS, set of 5 shims:
$ 19.95

HCP3991SET8 Aftermarket Hitachi throttle shaft seal SHIM WASHERS, set of eight shims:
$ 27.95



bbb6) Aftermarket Hitachi HSC32/33 series carb THROTTLE SHAFT PLASTIC SPACER BUSHINGS. These hard plastic spacers are used on the "inner" (left) side of the #3 carb only (it is normally hidden underneath the #3 carb throttle shaft return spring) on both the HSC32 and HSC33 model carbs, and on the "outer" side of the #2 and the #3 carbs on HSC33 models only. NOTE: these spacer do not "wear out" like the throttle shaft seals do, and you should only replace them if your original spacers are cracked, broken, worn or missing.

HCP6323 Aftermarket Hitachi #3 carb throttle shaft INNER SPACER BUSHING, use 1 per #3 carb on the inner side on both HSC32 and HSC33 carb models.
$ 11.95

HCP13648 Aftermarket Hitachi #2 and #3 carb throttle shaft OUTER SPACER BUSHING, use 1 per carb on both the #2 and the #3 carb on the outer side on HSC33 carb models only. Each:
$ 9.95




ts55) Aftermarket Hitachi HSC32 and 33 series carb THROTTLE SHAFT BRACKET RETAINER NUT and LOCKWASHER......used to secure the end bracket to the throttle shafts on the #2 and #3 carb only. For use on all XJ650 except Turbo, all XJ700 non-X, and all XJ750 air-cooled models.

HCP16805 Aftermarket throttle shaft end bracket retaining NUT, use 1 per shaft on both the #2 and the #3 carbs. Special thin nut is made from 18/8 stainless steel and has a bright finish. NOTE: the original nut is a 12mm hex; these are 13mm but will fit and work just fine. Each:
$ 2.95


HCP2185 OEM throttle shaft end bracket retaining nut LOCK WASHER, use 1 per shaft on both the #2 and the #3 carbs. Made from 18/8 stainless steel and has a bright finish. Each:
$ 6.95

HCP16209 Aftermarket throttle shaft end bracket retaining nut LOCK WASHER, use 1 per shaft on both the #2 and the #3 carbs. Made from zinc-plated alloy steel and has a bright finish. Each:
$ 2.95

HCP16100 Aftermarket throttle shaft end bracket retaining nut LOCK WASHER, use 1 per shaft on both the #2 and the #3 carbs. Made from 18-8 stainless-steel and has a bright finish. Each:
$ 3.95

HCP16102 Aftermarket throttle shaft end bracket retaining nut LOCK WASHER, use 1 per shaft on both the #2 and the #3 carbs. Black-oxide coated alloy steel. Each
$ 3.95



ts67) Aftermarket Hitachi HSC32 and HSC33 series carb THROTTLE SHAFTS and END BRACKETS......these re-plated throttle shafts and the #2 and #3 carb (only) shaft end brackets are a great way to restore that brand-new look to your carb kit. For use on all XJ650 except Turbo, all XJ700 non-X, and all XJ750 air-cooled models. Correct yellow-zinc plated brackets. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-carb shaft or bracket.

HCP903RP OEM re-plated original THROTTLE SHAFT, complete with its swaged (non-removable) shaft end bracket. Fits the #1 carb on all XJ650 (except Turbo), all XJ700 non-X, and all XJ750 air-cooled models. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-carb shaft. Each:
$ 39.95 + $ 25.00 refundable core charge


HCP37RP OEM re-plated original THROTTLE SHAFT, complete with its swaged (non-removable) shaft end bracket. Fits the #2 carb on all XJ650 models (except Turbo) and all XJ750 air-cooled models. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-carb shaft. Each:
$ 44.95 + $ 25.00 refundable core charge

HCP13646RP OEM re-plated original THROTTLE SHAFT, complete with its swaged (non-removable) shaft end bracket. Fits the #2 carb on all XJ700 air-cooled models. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-carb shaft. Each:
$ 49.95 + $ 25.00 refundable core charge

HCP2601RP OEM re-plated original throttle shaft END BRACKET, attaches to the threaded end of the #2 carb on all XJ650 (except Turbo), all XJ700 non-X, and all XJ750 air-cooled models. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-carb shaft end bracket. Each:
$ 29.95 + $ 25.00 refundable core charge


HCP1941RP OEM re-plated original THROTTLE SHAFT, complete with its swaged (non-removable) shaft end bracket. Fits the #3 carb on all XJ650 models (except Turbo) and all XJ750 air-cooled models. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-carb shaft. Each:
$ 44.95 + $ 25.00 refundable core charge

HCP13645RP OEM re-plated original THROTTLE SHAFT, complete with its swaged (non-removable) shaft end bracket. Fits the #3 carb on all XJ700 air-cooled models. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-carb shaft. Each:
$ 49.95 + $ 25.00 refundable core charge

HCP2600RP OEM re-plated original throttle shaft PIVOTING END BRACKET, attaches to the threaded end of the #3 carb on all XJ650 (except Turbo), all XJ700 non-X, and all XJ750 air-cooled models. This is the articulated bracket that the throttle cable attaches to. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-carb shaft end bracket. Each:
$ 39.95 + $ 25.00 refundable core charge


HCP1942RP OEM re-plated original THROTTLE SHAFT, complete with its swaged (non-removable) shaft end bracket. Fits the #4 carb on all XJ650 (except Turbo), all XJ700 non-X, and all XJ750 air-cooled models. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-carb shaft. Each:
$ 39.95 + $ 25.00 refundable core charge



HCP24047 OEM re-plated original THROTTLE SHAFTS and BRACKETS KIT, contains all four throttle shafts and their removable end brackets (for the #2 and #3 carb shafts). Fits all XJ650 models (except Turbo) and all XJ750 air-cooled models. NOTE: requires a $ 95.00 core charge, refundable upon the return of all four undamaged, same-model, same-carb shafts and their two end brackets. Each:
$ 229.95 + $ 95.00 refundable core charge

HCP24048 OEM re-plated original THROTTLE SHAFTS and BRACKETS KIT, contains all four throttle shafts and their removable end brackets (for the #2 and #3 carb shafts). Fits all XJ700 air-cooled models. NOTE: requires a $ 95.00 core charge, refundable upon the return of all four undamaged, same-model, same-carb shafts and their two end brackets. Each:
$ 239.95 + $ 95.00 refundable core charge




HITACHI BUTTERFLY VALVE SYNCH SCREWS HARDWARE:

ts37) The closed position of the individual throttle plate "butterfly" valves is controlled via a fine-threaded, spring-loaded SYNCH SCREW.........these are the actual screws that are adjusted when performing a "running synch" on the engine.

http://www.xjbikes.com/forums/threads/running-sync-screw-in-or-out-that-is-the-question.75716/

Our re-plated Hitachi synch SCREWS, SPRINGS, and PLUNGER RODS allow you to re-create the original look and beauty of these carb racks. These parts are available re-plated to their correct original yellow-zinc appearance. If you need to replace any missing hardware, or just want to create a show-winning look, then you should start your shopping list here! NOTE: all synch hardware pieces are re-plated, used parts, and as such, may have minor cosmetic flaws (tooling marks, fastener marks, etc.). Most such marks will not be visible once installed. Also, all re-plated items require a refundable core charge which will be credited back to you once you return a same-model, same-type of item(s)as you purchased. Since these are re-plated used parts, we do require an exchange for your original parts so we can have a steady supply of parts to be processed and re-plated for future sales.


HCP14204 OEM throttle valve adjuster SYNCH SCREW AND SPRING SET, use 1 per carb on the #1, #2, and #4 carb (the #3 carb does not use a synch screw). Fits all XJ650 (except Turbo), all air-cooled XJ700 non-X, and all air-cooled XJ750 engines with Hitachi carbs. Each set contains two springs and one screw (the thin-wire spring is for the screw; the thick-wire spring if for the plunger rod). Plunger rod is not included. NOTE: this replacement screw uses a straight slot instead of the original phillips-drive head.
$ 29.95

HCP47RP OEM re-plated throttle valve adjuster SYNCH SCREW, use 1 per carb on the #1, #2, and #4 carb (the #3 carb does not use a synch screw). Fits all XJ650 (except Turbo), all air-cooled XJ700 non-X, and all air-cooled XJ750 engines with Hitachi carbs. Correct yellow-zinc plated screw has the captive lockwasher and phillips-drive head. NOTE: requires a $ 5.00 core charge, refundable upon the return of an undamaged, same-model, same-type screw.
Each:
$ 12.95 + $ 5.00 refundable core charge

HCP45RP OEM re-plated throttle valve adjuster SYNCH SCREW SPRING, use 1 per carb on the #1, #2, and #4 carb (the #3 carb does not use a synch screw). Fits all XJ650 (except Turbo), all air-cooled XJ700 non-X, and all air-cooled XJ750 engines with Hitachi carbs. Correct yellow-zinc plated spring fits the HCP47RP screw above. NOTE: requires a $ 4.00 core charge, refundable upon the return of an undamaged, same-model, same-type spring.
Each:
$ 12.95 + $ 4.00 refundable core charge


HCP46ARP OEM re-plated throttle valve adjuster SYNCH PLUNGER ROD, use 1 per carb on the #1, #2, and #4 carb (the #3 carb does not use a synch screw system). Fits all XJ650 (except Turbo), all air-cooled XJ700 non-X, and all air-cooled XJ750 engines with Hitachi carbs. Correct yellow-zinc plated plunger rod fits into the “lower” section of the throttle arms. NOTE: requires a $ 5.00 core charge, refundable upon the return of an undamaged, same-model, same-type rod.
Each:
$ 13.95 + $ 5.00 refundable core charge

HCP46BRP OEM re-plated throttle valve adjuster PLUNGER ROD SPRING, use 1 per carb on the #1, #2, and #4 carb (the #3 carb does not use a synch screw). Fits all XJ650 (except Turbo), all air-cooled XJ700 non-X, and all air-cooled XJ750 engines with Hitachi carbs. Correct yellow-zinc plated spring fits the HCP46ARP rod above. NOTE: requires a $ 4.00 core charge, refundable upon the return of an undamaged, same-model, same-type spring. Each:
$ 12.95 + $ 4.00 refundable core charge



If the threaded holes in the throttle shaft brackets (where the synch screws are fitted) are overly tight, you may want to clean ("chase") the threads so you get a like-new feel to them:

HCP28202 Aftermarket THREAD CHASER AND CLEAN-UP TAP, made from a high-speed titanium nitride coated steel. For the following holes: Mikuni and Hitachi synch screw threads in the throttle shaft brackets, and Mikuni and Hitachi idle speed bolt threads in lower rack bracket.
$ 12.95

HCP28170 Aftermarket thread tap or EZ-out extractor TAP HANDLE, featuring offset tap handles and fully adjustable head for all m3-m12 size taps and size 0 to ½” extractors. This is the proper way to hold a tap or extractor to insure that the force is directed straight down and doesn’t “wobble” as you are cutting, reaming, or extracting. Much better than using pliers or vise-grips to hold the tool……..
$ 17.95





v5) Aftermarket Hitachi throttle shaft BUTTERFLY VALVE MOUNTING SCREW. Each round aluminum butterfly "valve" is held to the steel throttle shaft via two tiny phillips head screws. The throttle shaft has self-locking threads which makes the removal of these screws both a chore and usually results in a buggered phillips head slot. These replacement screws come in a variety of materials and drive styles. Use 2 per carb on all HSC32/33/40 series carbs.

And if you’re so unfortunate to have buggered the threads on the shaft, you might be able to rescue the threads on the throttle shafts by re-tapping the holes with this tap:

HCP6336 THREAD CHASER AND CLEAN-UP TAP, made from a high-speed uncoated steel. For the following holes:
- all Hitachi and Mikuni throttle shafts where the butterfly valve screw on
- all models petcock faceplate mounting screw holes.
$ 9.95

HCP28170 Aftermarket thread tap or EZ-out extractor TAP HANDLE, featuring offset tap handles and fully adjustable head for all m3-m12 size taps and size 0 to ½” extractors. This is the proper way to hold a tap or extractor to insure that the force is directed straight down and doesn’t “wobble” as you are cutting, reaming, or extracting. Much better than using pliers or vise-grips to hold the tool……..
$ 17.95


If the threads are too damaged, then we offer these problem-solver kits that contain a longer screw and special ultra-thin nut:

HCP26994SET Aftermarket Hitachi butterfly valve “problem-solver” MOUNTING SCREW & NUT SET, panhead 18-8 stainless steel screw, phillips-drive. This longer-than-stock screw and matching thin nut allows you to salvage a throttle shaft which has damaged, stripped, or missing threads…..the longer reach of the threads clears the back side of the throttle shaft and allows the nut to secure the valve to the shaft. NOTE: the threads in the throttle shaft should be drilled out using our HCP26993 oversize drill bit, to remove any damaged threads and to slightly enlarge the hole, allowing the replacement screw to pass through the throttle shaft without engaging the shaft. NOTE: you must use thread-locking fluid HCP1266 when installing this fastener! For use on Hitachi carbs as used on all XJ650 (except Turbo), 1985-86 XJ700 air-cooled -models, and all 1981-84 XJ750 air-cooled models. This set contain one screw and one nut, enough to repair one damaged hole. You will need to order 2 sets to repair both holes in a single throttle shaft.
$ 2.95



HITACHI IDLE - PILOT MIXTURE SCREW PARTS:

NOTE: idle mixture screws are also referred to as "pilot mixture screws" or "pilot screws".

If you've never delved into the guts of your carburetor idle mixture screw port, it can sometimes be confusing. Here's the playbook for this critical area:

If we were looking at a cut-away of the carb body/idle mixture screw bore, the order of parts, from bottom to top, would be:

a) HCP895 o-ring
b) HCP896 spring seat washer
c) HCP6573 tension spring
d) the idle mixture screw
e) the anti-tamper cap.

What is mostly confusing is the order of the o-ring versus the spring seat washer....which goes in the hole first? The answer is that the HCP895 O-ring does. The HCP896 washer primarily acts as the lower "seat" for the HCP6573 tension spring, while also keeping the o-ring firmly and securely in place.


NOTE: if you come across a stuck, seized, or otherwise so badly damaged screw that just won't come out, then here is the best advice that we can offer to deal with it:

http://xjbikes.com/forums/index.php?threads/32017



ims83) Aftermarket replacement IDLE MIXTURE SCREWS (sometimes referred to as pilot screws, or pilot mixture screws, or "those stripped out things in that hole up front"), for all Hitachi HSC-32 and -33 series carbs as used on XJ650 (except Turbo), all XJ750 Maxim and Seca models, and XJ700 non-X (air-cooled) carbs. Correct reproduction screws are available in the original styles to exactly replace damaged, stripped, or missing originals.

The original screws were available in three versions:

a) Alloy steel, with coarse-pitch threads, used on 1980-81 XJ650 Maxim and Midnight Maxim model carbs. The best description I can give for "coarse" threads is that the threads are sized much like you would see on a standard screw (like the carb bowl drain screws, etc.).....the threads are rather "wide apart". This is in contrast to..........

b) Alloy steel, with ultra-fine-pitch threads, used on 1982-up XJ650 models with Hitachi carbs, all XJ750 Maxim and Seca models, and possibly on early model XJ700 non-X Hitachi HSC33 series carbs. Ultra-fine thread pitch looks like screw threads used on some kind of jeweler's or watchmaker's incredibly-closely-spaced threads.

c) Brass, with ultra-fine-pitch threads, used only in XJ700 non-X Hitachi HSC33 series carbs.


Note that the determination of which style screw YOUR carbs have can vary from what MODEL AND YEAR bike you have, as someone may have switched a carb body, an entire rack of carbs, or due to original mass-production and supplier differences and timing of production.

ALL ORIGINAL HITACHI IDLE MIXTURE SCREWS ARE IDENTICAL AS TO FUNCTION AND DIFFER ONLY BY THEIR THREAD PITCH (coarse versus ultra-fine) AND THE MATERIAL THEY WERE MADE OF (alloy steel versus brass). Owners of carbs with the ultra fine-pitch threaded screws CANNOT use coarse-thread pitch screws, and vice-versa.

A visual identification of the different thread pitches can be seen at:

http://www.xjbikes.com/forums/threa...fference-between-coarse-and-fine-thread.80399

and

http://www.xjbikes.com/forums/threads/easy-carb-tuning-question.93762/#post-522499

Or, you can count threads:
- coarse-pitch mixture screws have a total of 5 threads.
- ultra-fine-pitch mixture screws have a total of 7-8 threads.

However, owners of carbs with the (much more common) ultra-fine pitch threaded bores and screws can use either the steel or brass screws interchangeably----although we recommend sticking with one or the other in a full rack of carbs.


Why did Hitachi change from using coarse thread (1980-81) to fine-threaded screws? Who knows, but it probably has something to do with the fineness of the adjustability needed for these precision mixture screws.....a fine-threaded screw offers a much more precise level of fine-tuning adjustability than a coarse-threaded screw does ("coarse-pitch" screws move the screw further along it's bore for each given amount of turning, so a 1/4-revolution turn of a coarse-pitch screw will move that screw FURTHER up or down in its bore than the same 1/4-revolution turn will move a fine-pitched screw).

Thus the standard advice of using the 2.5-to-3 turns out (from bottoming) as a "starting point" for the idle mixture screw setting is really based on the use of the fine-pitched screws; the earlier coarse-pitch screws would need to be initially set at about 1.5-to-2 turns out as an initial starting point.

More questions from the audience: Why did Hitachi change from using steel screws (most 1980-83 model carbs) to brass screws (1985-86 models)? Who knows, but it was either a cost saving measure (brass is not normally cheaper than steel, but it is much easier to machine precisely), or, given how these screws are known for seizing up in their bores, perhaps it was to provide a material that was not as susceptible to seizure (such as brass).

Either way, since you will be using some anti-seize fluid when installing your new screw (or even when re-using your old screws during a rebuild), this is not really an issue any more. Right? RIGHT? I mean, you WILL use anti-seize, won't you?

These idle mixture screws are exact reproductions of the originals, with the original straight-blade screw head, and are available in either the coarse-pitch in a Type 304 stainless steel material (instead of the original alloy steel), or in the fine pitch versions----and the fine pitch versions are available in either a Type 304 stainless steel material (instead of the original alloy steel) or screw-grade Brass.


Coarse-threaded Idle Mixture Screws:

HCP8392 Aftermarket Hitachi stainless steel IDLE MIXTURE SCREW with coarse threads, for all Hitachi HSC32 carbs with coarse threads in the idle mixture bore holes. Normally found on 1980-81 XJ650 models, but this "rule" may vary, so check your original screws or carb bore threads before ordering. Each:
$ 16.95

HCP8392SET4 Aftermarket Hitachi stainless steel IDLE MIXTURE SCREWS with coarse threads, set of 4:
$ 59.95



HCP8392KIT Aftermarket Hitachi stainless steel IDLE MIXTURE SCREW KIT with coarse threads, complete with one each of an HCP8392 stainless steel mixture screw, an HCP895 o-ring, the HCP6573 tension spring, and the HCP896 tension spring seat washer. Does one carb:
$ 19.95

HCP8392KIT4 Aftermarket Hitachi stainless steel IDLE MIXTURE SCREW KITS with coarse threads, set of 4 does one entire rack of carbs:
$ 69.95




HCP16592 Aftermarket Hitachi brass IDLE MIXTURE SCREW with coarse threads, for all Hitachi HSC32 carbs with coarse threads in the idle mixture bore holes. Coarse-threaded brass mixture screws were never originally used in Hitachi carbs, but these aftermarket versions are available for use on the 1980-81 XJ650 models that use coarse-threaded mixture screws. Each:
$ 21.95

HCP165922SET4 Aftermarket Hitachi brass IDLE MIXTURE SCREWS with coarse threads, set of 4:
$ 79.95



HCP16592KIT Aftermarket Hitachi brass IDLE MIXTURE SCREW KIT with coarse threads, complete with one each of an HCP8392 stainless steel mixture screw, an HCP895 o-ring, the HCP6573 tension spring, and the HCP896 tension spring seat washer. Does one carb:
$ 27.95

HCP165922KIT4 Aftermarket Hitachi brass IDLE MIXTURE SCREW KITS with coarse threads, set of 4 does one entire rack of carbs:
$ 89.95




Fine-threaded Idle Mixture Screws:

HCP8393 Aftermarket Hitachi stainless steel IDLE MIXTURE SCREW with ultra-fine threads, for all Hitachi HSC32 and HSC33 series carbs with fine threads in the idle mixture bore holes. Normally found on 1982-84 XJ650 models and all XJ750 air-cooled models, but those "rules" may vary, so check your original screws or carb bore threads before ordering. Each:
$ 16.95

HCP8393SET4 Aftermarket Hitachi stainless steel IDLE MIXTURE SCREWS with ultra-fine threads, set of 4:
$ 59.95



HCP8393KIT Aftermarket Hitachi stainless steel IDLE MIXTURE SCREW KIT with ultra-fine threads, complete with one each of an HCP8393 stainless steel mixture screw, an HCP895 o-ring, the HCP6573 tension spring, and the HCP896 tension spring seat washer. Does one carb:
$ 19.95

HCP8393KIT4 Aftermarket Hitachi stainless steel IDLE MIXTURE SCREW KITS with ultra-fine threads, set of 4 does one entire rack of carbs:
$ 74.95





HCP8394 Aftermarket Hitachi brass IDLE MIXTURE SCREW with ultra-fine threads, for all Hitachi HSC32 and HSC33 series carbs with fine threads in the idle mixture bore holes. Sometimes found on original 1983 XJ650 and XJ750 carbs, and always used on 1985-86 XJ700 non-X (air-cooled) models, but these "rules" may vary, so check your original screws or carb bore threads before ordering. Each:
$ 16.95

HCP8394SET4 Aftermarket Hitachi brass IDLE MIXTURE SCREWS with ultra-fine threads, set of 4:
$ 62.95



HCP8394KIT Aftermarket Hitachi brass IDLE MIXTURE SCREW KIT with ultra-fine threads, complete with one each of an HCP8394 brass mixture screw, an HCP895 o-ring, the HCP6573 tension spring, and the HCP896 tension spring seat washer. Does one carb:
$ 22.95

HCP8394KIT4 Aftermarket Hitachi brass IDLE MIXTURE SCREW KITS with ultra-fine threads, set of 4 does one entire rack of carbs:
$ 79.95



ddd) Aftermarket Hitachi IDLE MIXTURE SCREW O-RING.....a "must-replace" item when rebuilding your carbs. Made of long-lasting, fuel-resistant Buna-N material.

HCP895 Aftermarket Hitachi idle mixture screw O-RING, fits all Hitachi HSC32 and HSC33 model carbs as used on all XJ650 (except Turbo), XJ700 non-X, all XJ750 air-cooled models, and the HSC40 series carbs used on 1984-87 XV700, 1984-85 XV1000, and 1986-87 XV1100 models. Each:
$ 2.95

HCP895SET2 Aftermarket Hitachi idle mixture screw O-RINGS, set of 2:
$ 4.95

HCP895SET4 Aftermarket Hitachi idle mixture screw O-RINGS, set of 4:
$ 8.95


HCP29632 Aftermarket Hitachi idle mixture screw O-RING, fits all Hitachi HSC40-series carbs as used on 1981-83 XV750 and 1981-83 XV920 models, each:
$ 2.95

HCP29632SET2 Aftermarket Hitachi idle mixture screw O-RINGS, set of 2:
$ 4.95




eee) Aftermarket Hitachi IDLE MIXTURE SCREW TENSION SPRING SEAT WASHER.....also a "must-replace" item when rebuilding your carbs. Made of long-lasting, fuel- and water-resistant 18-8 stainless steel material.

HCP896 Aftermarket Hitachi idle mixture screw tension spring SEAT WASHER, fits all Hitachi HSC32 and HSC33 model carbs as used on all XJ650 (except Turbo), XJ700 non-X, all XJ750 air-cooled models, and the HSC40 series carbs used on 1984-87 XV700, 1984-85 XV1000, and 1986-87 XV1100 models. Each:
$ 2.95

HCP896SET2 Aftermarket Hitachi idle mixture screw tension spring SEAT WASHERS, set of 2:
$ 5.75

HCP896SET4 Aftermarket Hitachi idle mixture screw tension spring SEAT WASHERS, set of 4:
$ 10.95



ims6) Aftermarket carb IDLE MIXTURE SCREW TENSION SPRING, brand new reproductions exactly replace damaged, rusted, or missing originals. High-strength carbon-steel coil springs have a baked yellow-zinc plating as original.

HCP6573 Aftermarket idle mixture screw TENSION SPRING, fits all Hitachi HSC32 and HSC33 model carbs as used on all XJ650 (except Turbo), XJ700 non-X, and all XJ750 air-cooled models, each:
$ 6.95

HCP6573SET4 Aftermarket idle mixture screw TENSION SPRINGS, set of 4:
$ 22.95




ims3) Aftermarket idle mixture screw bore hole TAMPER CAPS replaces the original metal cap. These rubber plugs makes installation and removal much easier, and are highly recommended as a replacement for the original style metal cap (which,once installed, have to be drilled thru to be removed).

The HCP14731 plugs are a bit longer and may (probably will) require trimming of the base of the plug to fit properly/tightly, whereas the HCP7376 plugs have a much shorter ‘shaft” (below the head) and fit better (but both versions should use a small dab of adhesive to insure that they don’t vibrate loose out of the hole, as neither one is an exact-fit).


HCP14731 Aftermarket Hitachi idle mixture screw bore hole RUBBER PLUG, tapered design with mushroom head allows repeated removal and re-use. NOTE: may be a slightly loose fit on some models; if so, use a small amount of gasket or rubber adhesive to secure firmly in place (just a thin smear will do). Bottom part of shaft may need to be trimmed short for a perfect fit. Waterproof and dustproof design keeps the screw away from dirt and moisture, while also allowing for easy removal for tuning purposes. Fits all Hitachi HSC32 and HSC33 model carbs as used on all XJ650 (except Turbo), XJ700 non-X, and all XJ750 air-cooled models. Each:
$ 4.95

HCP14731SET4 Aftermarket Hitachi idle mixture screw bore hole RUBBER PLUGS, set of 4:
$ 17.95


HCP7376 Aftermarket Hitachi idle mixture screw bore hole RUBBER PLUG, tapered design with mushroom head allows repeated removal and re-use. NOTE: may be a slightly loose fit on some models; if so, use a small amount of gasket or rubber adhesive to secure firmly in place (just a thin smear will do). Waterproof and dustproof design keeps the screw away from dirt and moisture, while also allowing for easy removal for tuning purposes. A much better solution compared to the original metal anti-damper plugs! Fits all Hitachi HSC32 and HSC33 model carbs as used on all XJ650 (except Turbo), XJ700 non-X, and all XJ750 air-cooled models. Each:
$ 5.95

HCP7376SET4 Aftermarket Hitachi idle mixture screw bore hole RUBBER PLUGS, set of 4:
$ 22.95





c9) Hitachi or Mikuni carbs THREAD CHASER AND CLEAN-UP TAPS. The soft aluminum bodies of the carbs can take a severe beating over the years, especially as it concerns their threaded holes. Steel is harder than aluminum, so you know what's going to distort, deform, or strip first...the threaded bore holes. The following professional quality tool-steel metric cutting taps will allow you to either "clean-up" or re-thread distorted or stripped threads in all metals, soft (aluminum) to hard (steel). THE TINY VERY FINE THREADS OF THE IDLE MIXTURE SCREW PORT ARE ESPECIALLY PRONE TO DAMAGE AND SHOULD BE "CLEANED" UP WITH A PASS OF A THREADING TAP.

HCP2398 Aftermarket THREAD CHASER AND CLEAN-UP TAP, made from a high-speed uncoated steel. For use on all Mikuni idle mixture screw ports, and all Hitachi idle mixture screw ports with models using ultra-fine threaded idle mixture screws. NOTE: these threaded holes almost always need cleaning or re-tapping. Be careful when using these taps to make sure that you are cleaning and/or re-cutting the original threads, rather than any crossed/stripped threads that may be present. And beware the tiny needle tip hole at the bottom of the screw. Finally, note that the flat o-ring land (at the bottom of the screw hole) must not be damaged or gouged.......make sure that you do not run the tap in deep enough to damage that smooth land.
$ 14.95

HCP6335 THREAD CHASER AND CLEAN-UP TAP, made from a high-speed uncoated steel. For use on all Hitachi idle mixture screw ports, for models using coarse threaded idle mixture screws, and on all Mikuni carb bowl fuel drain screw ports. NOTE: these threaded holes almost always need cleaning or re-tapping.
$ 12.95

HCP28170 Aftermarket thread tap or EZ-out extractor TAP HANDLE, featuring offset tap handles and fully adjustable head for all m3-m12 size taps and size 0 to ½” extractors. This is the proper way to hold a tap or extractor to insure that the force is directed straight down and doesn’t “wobble” as you are cutting, reaming, or extracting. Much better than using pliers or vise-grips to hold the tool……..
$ 17.95




c9a) Hitachi & Mikuni carbs THREAD CHASER DIES. Unlike the thread taps listed above, these thread DIES are used to clean, restore, and repair threads on the threaded fasteners (screws, bolts, studs, etc.). These tools help restore that like-new feel to used bolts, and straighten and restore threads to allow for proper torque settings to be achieved and maintained. Most of these dies feature have a “hex-nut” shape, so you can use a wrench or socket to hold the die and turn it over the fastener. Dies HCP29360 and HCP29361 (for pilot circuit mixture screws) are the more common round dies, and would require a die holder tool to be used properly. Just like cleaning / chasing threaded holes with a tap, this task is easy to use, important to do, and when you’re done you’ll be glad you took the time to do the job properly! NOTE: these dies are not used to cut new threads, only to renew threads on non-hardened fasteners! Always lubricate the tool (or fastener) with a light oil or grease when using.


HCP29361 Aftermarket THREAD CHASER DIE, proper size (m6 x 0.50 pitch) for all Mikuni and the ultra-fine threaded Hitachi pilot circuit mixture screws. This is a very handy tool to have in your kit. You’ll need to use the HCP29363 holder to secure the die, or use a set of large pliers or channel locks to hold this round die…..and as you might expect, holding the die with the proper tool holder is the much preferred method. Using both a thread tap (HCP2398) and this die will allow you to clean up both elements of a fastener system for a like-new pattern of thread engagement and performance….this is how professional rebuilders do it! NOTE due to the extremely fine-threads on these screws, it can be quite difficult to get the re-threading process started correctly, and you can easily “cross-thread” the screw if the start of thread engagement is “forced”. Each:
$ 13.95

HCP29360 Aftermarket THREAD CHASER DIE, proper size (m6 x 0.75 pitch) for all coarse-threaded Hitachi pilot circuit mixture screws and for Mikuni float bowl drain screws. This is a very handy tool to have in your kit. You’ll need to use the HCP29363 holder to secure the die, or use a set of large pliers or channel locks to hold this round die…..and as you might expect, holding the die with the proper tool holder is the much preferred method. Use both a thread tap (HCP6335) and this die will allow you to clean up both elements of a fastener system for a like-new pattern of thread engagement and performance….this is how professional rebuilders do it! Each:
$ 13.95

HCP29363 Aftermarket threading die TOOL HOLDER, captures and securely holds round die HCP29360 or HCP29361 above. This is the proper way to hold a die, and insures that the force is directed straight down and doesn’t “wobble” as you are chasing old threads or cutting new ones. Much better than using pliers or vise-grips to hold the die……..
$ 12.95




v) IDLE MIXTURE SCREW TOOL is designed for the proper removal and fine adjustment of the idle mixture screw, preventing the destruction of the fragile straight slot head on these screws. An exact-fit blade is set at the end of a 12” long shaft, and the screw driving bit is rotated via a handle on the end of tool....this design not only eliminates stripping out the idle mixture screw slot, but also allows for very fine adjustment of the screw when fine-tuning the carbs (when using a colortune plug, etc.). The long horizontal shaft allows you to easily reach the center carbs from the outside of the carb bank, no need to lift the tank to access them. A knurled section on the shaft provides for a positive grip. A very neat little tool and it'll last a lifetime or two. Fits: all XJ550 all, all XJ650, all XJ700, all XJ750, all XJ900, XJ1100, and all 1980-81 XS1100 carbs.

HCP24870 Aftermarket idle mixture screw REMOVAL AND ADJUSTER TOOL, fits all Hitachi and all Mikuni idle mixture screws.
$ 34.95




HITACHI IDLE SPEED SCREW PARTS:

Not to be confused with the idle MIXTURE screw listed above, the IDLE SPEED SCREW is the large knurled-head screw that lives dead center, at the bottom of the carb rack, in-between the #2 and #3 cars, and pointing straight back. This screw is used to adjust the idle speed of the engine, and has no effect on the idle mixture nor the carb (engine) "synch" settings!

Our re-plated Hitachi idle speed adjustment SCREWS AND SPRINGS allow you to re-create the original look and beauty of these carb racks. These parts are available re-plated to their correct original yellow-zinc appearance. If you need to replace any missing hardware, or just want to create a show-winning look, then you should start your shopping list here! NOTE: all idle speed adjustment screws and springs are re-plated, used parts, and as such, may have minor cosmetic flaws (tooling marks, fastener marks, etc.). Most such marks will not be visible once installed. Also, all re-plated items require a refundable core charge which will be credited back to you once you return a same-model, same-type of item(s) as you purchased. Since these are re-plated used parts, we do require an exchange for your original parts so we can have a steady supply of parts to be processed and re-plated for future sales.


HCP95RP OEM re-plated idle speed adjuster SCREW, use 1 per carb rack in-between the #3 and #4 carbs. Fits all XJ650 (except Turbo), all air-cooled XJ700 non-X, and all air-cooled XJ750 engines with Hitachi carbs. Correct yellow-zinc plated screw has the large knurled head. NOTE: requires a $ 15.00 core charge, refundable upon the return of an undamaged, same-model, same-type screw.
Each:
$ 39.95 + $ 15.00 refundable core charge

HCP84RP OEM re-plated idle speed adjuster IDLE SPEED SCREW SPRING, use 1 per carb rack on the speed adjuster screw. Fits all XJ650 (except Turbo), all air-cooled XJ700 non-X, and all air-cooled XJ750 engines with Hitachi carbs. Correct yellow-zinc plated spring fits the HCP95RP screw above. NOTE: requires a $ 5.00 core charge, refundable upon the return of an undamaged, same-model, same-type spring.
Each:
$ 19.95 + $ 5.00 refundable core charge



HCP9849 Aftermarket Hitachi idle speed screw rubber GROMMET, fits into the lower carb rack bracket opening where the idle speed screw enters the bracket. This replacement grommet is quite a bit larger than the stock grommet, but fits and works properly. Use a little bit of silicone grease on the screw's shaft where it passes through this grommet and it will be silky-smooth in operation. Fits all XJ650 (except Turbo), XJ700 non-X, and XJ750 models using Hitachi carbs.
$ 3.95


HCP4024 Aftermarket Hitachi carb idle speed screw WASHER, not an original part, but if you use a set of these thin flat plastic shimming washers in-between the spring and the screw, and between the spring and the bracket (in other words, on either end of the spring), it greatly reduces the friction between the two and makes the idle screw silky-smooth to adjust! Fits all XJ650 (except Turbo), XJ700 non-X, and XJ750 models using Hitachi carbs. Each:
$ 3.95

HCP4024SET2 Aftermarket Hitachi carb idle speed screw WASHERS, set of 2:
$ 5.95



If the threaded hole in the lower rack bracket (where the idle speed screw is fitted) is overly tight, you may want to clean ("chase") the threads so you get a like-new feel to them:

HCP28202 Aftermarket THREAD CHASER AND CLEAN-UP TAP, made from a high-speed titanium nitride coated steel. For the following holes: Mikuni and Hitachi synch screw threads in the throttle shaft brackets, and Mikuni and Hitachi idle speed bolt threads in lower rack bracket.
$ 12.95

HCP28170 Aftermarket thread tap or EZ-out extractor TAP HANDLE, featuring offset tap handles and fully adjustable head for all m3-m12 size taps and size 0 to ½” extractors. This is the proper way to hold a tap or extractor to insure that the force is directed straight down and doesn’t “wobble” as you are cutting, reaming, or extracting. Much better than using pliers or vise-grips to hold the tool……..
$ 17.95




HITACHI CARB FUEL SUPPLY AND BOWL OVERFLOW T-FITTINGS and CONNECTOR TUBES:

mtz1) Aftermarket Hitachi fuel supply input T-FITTING AND OVERFLOW T-FITTINGS. The fuel inlet t-fitting is accepts the fuel line from the petcock and, via the connector tubes, "splits" the fuel flow to the other carbs for their incoming fuel supply. While the original inlet t-fittings are no longer available, our solid machined brass replacements use dual o-rings on each leg, and fit and seal as well or better than the originals.

Bowl vent/overflow t-fittings are used only on the HSC33 series carbs (used on XJ700 air-cooled models and XJ750RL models only). These replacement overflow t-fittings are made from solid brass, and have machined grooves to accept dual rubber o-rings.

HCP16327 Aftermarket Hitachi HSC32-series carbs brass fuel inlet T-FITTING, for use on all XJ650 (except Turbo) models, and all 1981-83 XJ750 models. These solid brass tee's include the o-rings on each "leg". Use 1 per carb rack, fitted between carbs #1 and #2. Each:
$ 39.95

HCP16329 Aftermarket Hitachi HSC33-series carbs brass fuel inlet T-FITTING, for use on all XJ700 air-cooled models and XJ750RL models. These solid brass tee's use dual o-rings (included) on each "leg" and thus fits and seals much better than the original fitting. Use 1 per carb rack, fitted between carbs #2 and #3. Each:
$ 39.95


HCP16328 Aftermarket brass fuel bowl vent/overflow T-FITTING, use 2 on all XJ700 air-cooled models and XJ750RL models in-between both the #1/2 and #3/4 carbs. Includes o-rings. These brass tee's fit and seal much better than the original fittings. Each:
$ 36.95



HCP90BR OEM brass fuel SUPPLY TUBE, use 1 each on all HSC32-series carbs as used on all XJ650 (except Turbo), XJ750 Maxim, 1981-83 XJ750 Seca and Euro models, and XJ750P (37H models) between the #2/3 carbs. Note that some models may have used aluminum (rather than brass) tubes originally. Sealing o-rings are included. NOTE: if replacements are ever needed, use o-ring HCP2420 or HCP2421 on these fittings. Each:
$ discontinued

HCP28466 Aftermarket brass fuel SUPPLY TUBE, use 1 each on all HSC32-series carbs as used on all XJ650 (except Turbo), XJ750 Maxim, 1981-83 XJ750 Seca and Euro models, and XJ750P (37H models) between the #2/3 carbs. Note that some models may have used aluminum (rather than brass) tubes originally. Sealing o-rings are NOT included, use 2 of part number HCP2420 or HCP2421 on these fittings. Each:
$ 27.95


HCP91BR OEM brass fuel SUPPLY TUBE, use 1 each on all HSC32-series carbs as used on all XJ650 (except Turbo), XJ750 Maxim, 1981-83 XJ750 Seca and Euro models, and XJ750P (37H models) between the #3/4 carbs. Note that some models may have used aluminum (rather than brass) tubes originally. Sealing o-rings are included. NOTE: if replacements are ever needed, use o-ring HCP2420 or HCP2421 on these fittings. Each:
$ discontinued

HCP28467 brass fuel SUPPLY TUBE, use 1 each on all HSC32-series carbs as used on all XJ650 (except Turbo), XJ750 Maxim, 1981-83 XJ750 Seca and Euro models, and XJ750P (37H models) between the #3/4 carbs. Note that some models may have used aluminum (rather than brass) tubes originally. Sealing o-rings are NOT included, use 2 of part number HCP2420 or HCP2421 on these fittings. Each:
$ 27.95



HCP3811BR OEM brass fuel SUPPLY TUBE, use 2 each on all HSC33-series carbs as used on all XJ700 air-cooled models and 1984 XJ750RL Seca (44X Canadian models) between the #1/2 and the #3/4 carbs. Note that some models may have used aluminum (rather than brass) tubes originally. Sealing o-rings are included. NOTE: if replacements are ever needed, use o-ring HCP2420 or HCP2421 on these fittings. Each:
$ discontinued

HCP28469 brass fuel SUPPLY TUBE, use 2 each on all HSC33-series carbs as used on all XJ700 air-cooled models and 1984 XJ750RL Seca (44X Canadian models) between the #1/2 and the #3/4 carbs. Note that some models may have used aluminum (rather than brass) tubes originally. Sealing o-rings are NOT included, use 2 of part number HCP2420 or HCP2421 on these fittings. Each:
$ 27.95



HITACHI CARB FUEL PIPE O-RINGS:

mmm1) OEM and Aftermarket Hitachi fuel supply t-fittings and connector tube O-RING.....all fours carbs share a common fuel supply, and this fuel supply is distributed to each carb via a brass or aluminum tube that connects one carb to another. These tubes fits into a machined bores in the carb base, and the tubes are sealed in their bores with these rubber o-rings. NOTE: original seals were "D-rings" rather than "O-rings", but are now serviced only as o-rings (both OEM and replacements), but are the correct shape and firmness to provide a leak-proof fit. You will only be able to access these seals if you break the carbs out of their rack! (and if you do break the rack, you need to replace these seals). Aftermarket seals comes in your choice of either a lower-cost Buna-N material, or a longer-life Viton material. Either one will work just fine and last until the next time you take your carbs apart!

The viton material is much harder than the Buna-N material and the use of the viton seals requires quite a bit of effort to install the connector tube into the carb fuel port bores!

- Use 2 seals per tube, or a total of 6 seals per entire carb rack, for HSC32 series carbs (XJ650 except Turbo, 1981-83 XJ750 all models).

- Use 2 seals per tube, or a total of 10 seals per entire carb rack, for HSC33 series carbs (all XJ700 non-X and XJ750RL models). The same seals are used on both the fuel pipes and the carb overflow t-fittings.

- Use 2 seals per tube, or a total of 4 seals per entire carb rack, for HSC34 series carbs (on 1980-81 XS850 all models).

NOTE: make sure you clean the internal bore cavity (where the fuel pipes fit into the carb body) very well, as that cavity accumulates quite a bit of debris and hardened fuel remnants over the years. Our HCP1409SS bristle-wire brush is the perfect tool for this job:

HCP1409SS Aftermarket STAINLESS STEEL WIRE-BRISTLE CLEANING BRUSH, 9.5mm diameter, great for the float valve seat threaded bore in all Hitachi carb bodies, and the fuel supply pipe bores within the carb body.
$ 8.95


Also, make sure that you do not "pinch" the o-rings as the tube is being inserted into the bores; some silicone grease or dish-washing soap on the o-rings will help avoid that problem.


HCP92 OEM Hitachi fuel supply tube O-RING, each:
$ 4.95

HCP2421SET2 OEM Hitachi Buna-N material fuel supply tube O-RINGS, pair:
$ 8.95

HCP2421SET4 OEM Hitachi Buna-N material fuel supply tube O-RINGS, set of 4:
$ 16.95

HCP2421SET6 OEM Hitachi Buna-N material fuel supply tube O-RINGS, set of 6:
$ 23.95

HCP2421SET10 OEM Hitachi Buna-N material fuel supply tube O-RINGS, set of 10:
$ 36.95



HCP2421 Aftermarket Hitachi Buna-N material fuel supply tube O-RING, each:
$ 3.95

HCP2421SET2 Aftermarket Hitachi Buna-N material fuel supply tube O-RINGS, pair:
$ 6.95

HCP2421SET4 Aftermarket Hitachi Buna-N material fuel supply tube O-RINGS, set of 4:
$ 12.95

HCP2421SET6 Aftermarket Hitachi Buna-N material fuel supply tube O-RINGS, set of 6:
$ 17.95

HCP2421SET10 Aftermarket Hitachi Buna-N material fuel supply tube O-RINGS, set of 10:
$ 27.95



HCP2420 Aftermarket Hitachi Viton material fuel supply tube O-RING, each:
$ 3.95

HCP2420SET2 Aftermarket Hitachi Viton material fuel supply tube O-RINGS, pair:
$ 7.75

HCP2420SET4 Aftermarket Hitachi Viton material fuel supply tube O-RINGS, set of 4:
$ 14.95

HCP2420SET6 Aftermarket Hitachi Viton material fuel supply tube O-RINGS, set of 6:
$ 21.95

HCP2420SET10 Aftermarket Hitachi Viton material fuel supply tube O-RINGS, set of 10:
$ 32.95




HITACHI CARB STARTER - ENRICHMENT CIRCUIT - CHOKE SYSTEM PARTS:

The starter (choke) circuit is prone to a number of problems, from clogged passages in the starter jet (down in the bowl) to worn or fractured plunger valves and their related hardware. We've got some of those hard-to-find parts to properly restore your system.

The starter circuit PLUNGER VALVE is the solid brass, needle-tipped valve that actually shuts off or opens the enrichment circuit. Worn tips, gouged seats, or a fractured head renders these valves useless, or will cause them to constantly leak fuel, resulting in an overly-rich fuel mixture. These valves are SPRING-loaded, and retained in the starter valve port in the carb body by a threaded, hollow-center brass SEAT, which is then surrounded by a small rubber DUST CAP.


And if the threaded seat in the carb body where the plunger shaft brass seat screws into has been injured, or if you want to restore the threads to their like-new condition, this thread chaser tap is what you'll need:

HCP2401 THREAD CHASER AND CLEAN-UP TAP, made from a high-speed titanium nitride coated steel. For the following holes: Hitachi starter / enrichment circuit (“choke”) brass plunger seat bore hole.
$ 12.95

HCP28170 Aftermarket thread tap or EZ-out extractor TAP HANDLE, featuring offset tap handles and fully adjustable head for all m3-m12 size taps and size 0 to ½” extractors. This is the proper way to hold a tap or extractor to insure that the force is directed straight down and doesn’t “wobble” as you are cutting, reaming, or extracting. Much better than using pliers or vise-grips to hold the tool……..
$ 17.95



HCP11141 Aftermarket Hitachi starter plunger valve seat DUST CAP, rubber seat cinches to the screw-in brass plunger seats and provides a dust- and air-tight seal that the plunger valves slides through. Most originals are hardened and inflexible due to heat saturation and no longer provide a good (or any!) sealing at all. Fits all XJ650 (except Turbo), XJ700 air-cooled, XJ750 air-cooled, 1984-87 XV700, 1981-83 XV750, 1981-83 XV920, 1984-85 XV1000, and 1986-87 XV1100 Virago carbs. Each:
$ 8.95

HCP11141SET4 Aftermarket Hitachi starter plunger valve seat DUST CAPS, set of 4:
$ 34.95



HCP17580 Aftermarket Hitachi brass STARTER PLUNGER VALVE, fits all XJ650 (except Turbo), all XJ700 air-cooled models, and all 1981-84 XJ750 air-cooled models, each:
$ 21.95

HCP17580SET4 Aftermarket Hitachi brass STARTER PLUNGER VALVES, fits all XJ650 (except Turbo), all XJ700 air-cooled models, and all 1981-84 XJ750 air-cooled models, set of 4:
$ 79.95


HCP11143 Aftermarket Hitachi brass starter plunger valve SPRING, fits all XJ650 (except Turbo), all XJ700 air-cooled models, and all 1981-84 XJ750 air-cooled models, each:
$ 5.95

HCP11143SET4 Aftermarket Hitachi brass starter plunger valve SPRINGS, fits all XJ650 (except Turbo), all XJ700 air-cooled models, and all 1981-84 XJ750 air-cooled models, set of 4:
$ 19.95


Hitachi Carb Starter - Enrichment (“Choke”) Circuit Shaft and Brackets:

Our re-plated Hitachi starter - enrichment (“choke”) circuit SHAFTS AND BRACKETS allow you to re-create the original look and beauty of these carb racks. These parts are available re-plated to their correct original yellow-zinc or black-zinc appearance. If you need to replace any missing hardware, or just want to create a show-winning look, then you should start your shopping list here! NOTE: all enrichment circuit shafts and brackets are re-plated, used parts, and as such, may have minor cosmetic flaws (tooling marks, fastener marks, etc.). Most such marks will not be visible once installed. Also, all re-plated items require a refundable core charge which will be credited back to you once you return a same-model, same-type of item(s) as you purchased. Since these are re-plated used parts, we do require an exchange for your original parts so we can have a steady supply of parts to be processed and re-plated for future sales.


HCP27Y OEM carb starter - enrichment (“choke”) circuit ACTUATING SHAFT, long round shaft that carries the choke plunger lifter “finger” brackets. Beautiful yellow-zinc plating brings the top side of these carbs to life. Fits all HSC32-series carbs as used on XJ650 Maxim, XJ650 Euro, XJ650RJ Seca, 1981-83 XJ750 Maxim and Seca, and XJ750 Euro models. Will also fit all XJ650 Midnight Maxim and XJ750 Midnight Maxim models but has a non-correct finish. Note that some models original came with silver-zinc plating on these shafts.
$ 59.95

HCP27RP OEM re-plated carb starter - enrichment (“choke”) circuit ACTUATING SHAFT, long round shaft that carries the choke plunger lifter “finger” brackets. Beautiful silver-zinc plating brings the top side of these carbs to life. Fits all HSC32-series carbs as used on XJ650 Maxim, XJ650 Euro, XJ650RJ Seca, 1981-83 XJ750 Maxim and Seca, and XJ750 Euro models. Will also fit all XJ650 Midnight Maxim and XJ750 Midnight Maxim models but has a non-correct finish. Note that some models original came with yellow-zinc plating on these shafts. NOTE: requires a $ 20.00 core charge, refundable upon the return of an undamaged, same-model, same-type shaft.
$ 49.95 + $ 20.00 refundable core charge

HCP5249RP OEM re-plated carb starter - enrichment (“choke”) circuit ACTUATING SHAFT, long round shaft that carries the choke plunger lifter “finger” brackets. Black-zinc plating as original. Fits HSC32-series carbs as used on XJ650 Midnight Maxim and XJ750 Midnight Maxim models. NOTE: requires a $ 20.00 core charge, refundable upon the return of an undamaged, same-model, same-type shaft.
$ 59.95 + $ 20.00 refundable core charge

HCP5250RP OEM re-plated carb starter - enrichment (“choke”) circuit ACTUATING SHAFT, long round shaft that carries the choke plunger lifter “finger” brackets. Beautiful silver-zinc plating brings the top side of these carbs to life. Fits HSC33-series carbs as used on XJ700 air-cooled models and 1984 XJ750RL carbs. NOTE: requires a $ 20.00 core charge, refundable upon the return of an undamaged, same-model, same-type shaft.
$ 54.95 + $ 20.00 refundable core charge



HCP5235RP OEM re-plated carb starter - enrichment (“choke”) circuit ACTUATING BRACKET, this is the V-shaped bracket (with the cable-end clasp) which is screwed onto the actuating shaft listed above. Beautiful silver-zinc plating brings the top side of these carbs to life. Fits all HSC32- and HSC33-series carbs as used on all XJ650 Maxim, XJ700 air-cooled, 1981-83 XJ750, and XJ750 Euro models. Will also fit all XJ650 Midnight Maxim and XJ750 Midnight Maxim models but has a non-correct finish. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 39.95 + $ 25.00 refundable core charge

HCP5236RP OEM re-plated carb starter - enrichment (“choke”) circuit ACTUATING BRACKET, long round shaft that carries the choke plunger lifter “finger” brackets. Black-zinc plating as original. Fits HSC32-series carbs as used on XJ650 Midnight Maxim and XJ750 Midnight Maxim models. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 49.95 + $ 25.00 refundable core charge



HCP5251RP-SET4 OEM re-plated carb starter - enrichment (“choke”) circuit PLUNGER LIFTER BRACKETS, set of 4 of the choke plunger-lifter “finger” brackets. Beautiful silver-zinc plating brings the top side of these carbs to life. Fits all HSC32- and HSC33-series carbs as used on all XJ650 Maxim, XJ700 air-cooled, 1981-83 XJ750, and XJ750 Euro models. Will also fit all XJ650 Midnight Maxim and XJ750 Midnight Maxim models but has a non-correct finish. NOTE: requires a $ 20.00 core charge, refundable upon the return of an undamaged, same-model, same-type lifter brackets.
$ 29.95 + $ 20.00 refundable core charge

HCP5252RP-SET4 OEM re-plated carb starter - enrichment (“choke”) circuit PLUNGER LIFTER BRACKETS, set of 4 of the choke plunger-lifter “finger” brackets. Black-zinc plating as original. Fits HSC32-series carbs as used on XJ650 Midnight Maxim and XJ750 Midnight Maxim models. NOTE: requires a $ 20.00 core charge, refundable upon the return of an undamaged, same-model, same-type lifter brackets.
$ 37.95 + $ 20.00 refundable core charge




Hitachi Carb Starter - Enrichment Circuit Cable Brackets:

HCP347RP OEM re-plated carb hat CHOKE CABLE BRACKET, mounted on the #4 hat inner position. Beautiful yellow-zinc plating brings the top side of these carbs to life. Fits all HSC32-series carbs as used on XJ650 Maxim, XJ650 Euro, XJ650RJ Seca, 1981-83 XJ750 Maxim and Seca, and XJ750 Euro models. Will also fit all XJ650 Midnight Maxim and XJ750 Midnight Maxim models but has a non-correct finish. Does not include the HCP2425RP clamp or the HCP2426 clamp screw listed below. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 49.95 + $ 25.00 refundable core charge

HCP23261RP OEM re-plated carb hat CHOKE CABLE BRACKET, mounted on the #4 hat inner position. Beautiful yellow-zinc plating brings the top side of these carbs to life. Fits all HSC33-series carbs as used on XJ700 air-cooled and 1984 XJ750RL Seca models. Does not include the HCP2425RP clamp or the HCP2426 clamp screw listed below. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 59.95 + $ 25.00 refundable core charge

HCP2425RP OEM re-plated carb hat choke cable bracket CLAMP, mounts to the HCP347RP choke cable bracket listed above. Beautiful yellow-zinc plating brings the top side of these carbs to life. Fits all HSC32-series carbs as used on XJ650 Maxim, XJ650 Euro, XJ650RJ Seca, XJ700 air-cooled models, 1981-83 XJ750 Maxim and Seca, and XJ750 Euro models. Will also fit all XJ650 Midnight Maxim and XJ750 Midnight Maxim models but has a non-correct finish. Does not include the HCP2426 clamp screw listed below. NOTE: requires a $ 15.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 24.95 + $ 15.00 refundable core charge


HCP5407RP OEM re-plated carb hat CHOKE CABLE BRACKET, mounted on the #4 hat inner position. Beautiful black-zinc plating brings the top side of these carbs to life. Fits all HSC32-series carbs as used on XJ650 Midnight Maxim and 1983-84 XJ750 Midnight Maxim models. Does not include the HCP5408RP clamp or the HCP2426 clamp screw listed below. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 59.95 + $ 25.00 refundable core charge

HCP5408RP OEM re-plated carb hat choke cable bracket CLAMP, mounts to the HCP347RP choke cable bracket listed above. Black-zinc plating as original. Fits all HSC32-series carbs as used on XJ650 Midnight Maxim and 1983-84 XJ750 Midnight Maxim models. Does not include the HCP2426 clamp screw listed below. NOTE: requires a $ 15.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 29.95 + $ 15.00 refundable core charge

HCP2426RP OEM re-plated carb hat choke cable bracket CLAMP SCREW, mounts the choke cable clamp to the choke cable bracket on all XJ650 Maxim, XJ650 Midnight Maxim, XJ650 Euro, XJ650RJ Seca, XJ700 air-cooled models, 1981-83 XJ750 Maxim and Seca, XJ750 Midnight Maxim, and XJ750 Euro models. Beautiful yellow-zinc plating brings the top side of these carbs to life. NOTE: requires a $ 10.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 14.95 + $ 10.00 refundable core charge



Hitachi Carb Starter - Enrichment Circuit Fasteners:

xx4) Aftermarket Hitachi Starter-Enrichment Circuit Arm-to-Shaft SET SCREW. These replacement screws are used to retain the starter lever "finger" bracket to the starter circuit shaft. Use 4 of these screws per rack. NOTE: originally, these screws had a bright zinc-plated finish, with a straight slot (flat) head style drive. All aftermarket screws feature an allen-head drive and are slightly shorter (about 1mm) or longer (about 1mm) than the original set screws, but that length differences causes no operational or interference problems.


HCP21376 Aftermarket Hitachi enrichment circuit lever arm-to-shaft SET SCREW, original straight-slot design, zinc-plated alloy steel. Slightly shorter than stock. Each:
$ 1.95

HCP21376SET4 Aftermarket Hitachi enrichment circuit lever arm-to-shaft SET SCREWS, set of 4:
$ 5.95


HCP21375 Aftermarket Hitachi enrichment circuit lever arm-to-shaft SET SCREW, original straight-slot design, 18-8 stainless steel. Slightly shorter than stock. Each:
$ 1.95

HCP21375SET4 Aftermarket Hitachi enrichment circuit lever arm-to-shaft SET SCREWS, set of 4:
$ 7.50


HCP299 Aftermarket Hitachi enrichment circuit lever arm-to-shaft SET SCREW, hex-key drive, black oxide coated alloy steel. Slightly longer than stock. Each:
$ 1.25

HCP299SET4 Aftermarket Hitachi enrichment circuit lever arm-to-shaft SET SCREWS, set of 4:
$ 4.75


HCP300 Aftermarket Hitachi enrichment circuit lever arm-to-shaft SET SCREW, hex-key drive, 18-8 stainless steel. Slightly longer than stock. Each:
$ 1.25

HCP300SET4 Aftermarket Hitachi enrichment circuit lever arm-to-shaft SET SCREWS, set of 4:
$ 4.75



xx5) Hitachi Starter-Enrichment SHAFT RETAINING SCREW, used to retain the starter shaft bracket to the starter circuit shaft. Use 1 of these screws per rack. NOTE: originally, these panhead screws had a bright, zinc-plated finish with a phillips-head drive system, and a captive lock washer. All OEM and aftermarket screws do not come with the captive lock washer, and a lock washer needs to be ordered separate.

HCP292 OEM Hitachi enrichment circuit SHAFT RETAINING SCREW, black oxide coated alloy steel, panhead, phillips-drive. Use with the HCP296 or HCP298 lock washer listed further below. Each:
$ 2.95

HCP898 Aftermarket Hitachi enrichment circuit SHAFT RETAINING SCREW, zinc-plated alloy steel, panhead, phillips-drive. Use with the HCP297 lock washer listed further below. Each:
$ 1.95

HCP293 Aftermarket Hitachi enrichment circuit SHAFT RETAINING SCREW, panhead, phillips-drive, 18-8 stainless steel. Use with the HCP297 lock washer listed further below. Each:
$ 2.95

HCP294 Aftermarket Hitachi enrichment circuit SHAFT RETAINING SCREW, 18-8 stainless steel, socket-head, hex-drive. Use with the HCP297 lock washer listed further below. Each:
$ 2.95

HCP21403 Aftermarket Hitachi enrichment circuit SHAFT RETAINING SCREW, 18-8 stainless steel, button-head, hex-drive. Use with the HCP297 lock washer listed further below. Each:
$ 2.95

HCP295 Aftermarket Hitachi enrichment circuit SHAFT RETAINING SCREW, black oxide coated alloy steel, socket-head, hex-drive. Use with the HCP298 lock washer listed further below. Each:
$ 1.95



xx6) Hitachi enrichment shaft retainer screw LOCK WASHER, use with the above retainer screws. Use 1 of these washers per rack. NOTE: originally, the retainer screw came with a captive lock washer; all OEM and aftermarket screws do not come with the captive lock washer, and a lock washer needs to be ordered separate.


HCP296 OEM Hitachi enrichment shaft retainer screw LOCK WASHER, zinc-plated alloy steel. Use with the HCP292 retaining screw listed above. Each:
$ 1.50

HCP297 Aftermarket Hitachi enrichment shaft retainer screw LOCK WASHER, 18-8 stainless steel. Use with the HCP293, HCP898, HCP21403, or HCP294 retaining screw listed above. Each:
$ 0.95

HCP298 Aftermarket Hitachi enrichment shaft retainer screw LOCK WASHER, black oxide coated alloy steel. Use with the HCP292 or HCP295 retaining screw listed above. Each:
$ 0.95



xx7) Aftermarket Hitachi Starter-Enrichment Circuit Arm-to-Shaft SPACER BUSHINGS. These plastic spacers fit onto the starter shaft on the right end, between the #3 and #4 carbs. There is a short, thin bushing (used in-between the starter shaft support post on the #4 carb and the choke lever actuator bracket for the #4 carb) and a much longer bushing (used in-between the #4 carb starter shaft support bracket and the choke shaft actuating bracket). Although these bushings generally never "wear out", they do get very discolored over time (becoming almost brown in color) and nice fresh set of snow-white bushings really spruces up any carb rebuild project. Precision-machined delrin plastic spacer bushings for all HSC32 or HSC33 series carbs used on XJ model bikes. NOTE: originally, these bushings were white on all models, including the otherwise all-black carbs used on Midnight Maxim models. We also offer these bushings in black for a custom-look on those models.

HCP900WH Aftermarket Hitachi starter shaft THIN ("short") SPACER BUSHING, white, use one per carb rack on both the HSC32 and HSC33 model carbs.
$ 10.95

HCP900BL Aftermarket Hitachi starter shaft THIN ("short") SPACER BUSHING, black, use one per carb rack on both the HSC32 and HSC33 model carbs.
$11.95


HCP901WH Aftermarket Hitachi starter shaft THICK ("long") SPACER BUSHING, white, use one per carb rack on HSC32 model carbs.
$ 12.95

HCP901BL Aftermarket Hitachi starter shaft THICK ("long") SPACER BUSHING, black, use one per carb rack on HSC32 model carbs.
$ 13.95


HCP13650 Aftermarket Hitachi starter shaft THICK ("long") SPACER BUSHING, white, use one per carb rack on HSC33 model carbs.
$ 14.95




HITACHI VACUUM DIAPHRAM AND PISTON ASSEMBLY:

fs5) OEM Hitachi HSC32 series carbs VACUUM DIAPHRAM AND PISTON ASSEMBLY, the slide piston with the non-detachable rubber vacuum diaphram seal. Although it is possible to repair thin spots and TINY pin-holes that occur in original diaphragms, anything greater than that will require replacement, as these diaphram are under a lot of pressure and stress and the continued flexing of the rubber will eventually lead to failure. Fits all XJ650 (except Turbo) models, and all XJ750 models. NOTE: HSC32 series carbs are used on all XJ650 (except Turbo) engines, and all XJ750 air-cooled engines except the 1984 XJ750RL engines.....which, along with the XJ700 air-cooled models, used the HSC33 series carbs.

NOTE: carbs that have been modified with aftermarket "jetting kits" may have had the air bleed holes in the bottom of the piston modified (enlarged), as that is what the jetting kit manufactures advise (and typically include a specific size drill bit in their kits). Larger air bleed holes in these pistons will cause them to rise quicker, thus richening the fuel mixture earlier in the rpm range. This is a modification that is not easily "un-done" on modified pistons. Stock bleed holes are about 1.70mm and 1.75mm in diameter on the HSC32 series pistons.

The long slinky SPRING provides the proper pressure and resistance to the movement of the piston unit under a variety of vacuum signal conditions, and modified, stretched, or damaged springs should be replaced. Ideally, all fours springs should be replaced all at once to insure equal response from each vacuum piston.


HCP69 OEM Hitachi carb VACUUM DIAPHRAM AND PISTON ASSEMBLY, brand new, each:
$ discontinued

HCP69SET4 OEM Hitachi carb VACUUM DIAPHRAM AND PISTON ASSEMBLIES, set of 4:
$ discontinued


HCP19365 Aftermarket Hitachi HSC32-series vacuum piston SPRING, fits all XJ650 (except Turbo) and all air-cooled XJ750 (except 1984 XJ750RL) model carbs, each:
$ 14.95

HCP19365SET4 Aftermarket Hitachi HSC32-series vacuum piston SPRINGS, set of 4:
$ 54.95


HCP19366 Aftermarket Hitachi HSC33-series vacuum piston SPRING, fits all XJ700 non-X (air-cooled) and all 1984 XJ750RL air-cooled model carbs, each:
$ 14.95

HCP19366SET4 Aftermarket Hitachi HSC33-series vacuum piston SPRINGS, set of 4:
$ 54.95



HCP8540 Aftermarket carb diaphram rubber RnR FLUID. Dissolved and chlorinated paraffin wax is the best (and perhaps the only) way to safely bring some life back into stiff, worn rubber material... such as that found in those all-important carb piston diaphragms. Years of hard life inside of your carb take their toll, and whenever your carb is apart for service, and generous application of this product will help to clean, maintain, and restore the flexibility, while prolonging their usable service life. 10cc dripper bottle contains enough fluid to do about eight diaphragms. Simple to use, spread on, wait a few minutes, wipe off, repeat and you're done!
$ 14.95



fms76) Aftermarket Hitachi carb vacuum piston DIAPHRAM ONLY allows you to salvage your original pistons by replacing the rubber diaphragm. NOTE: the use of the any of the following vacuum diaphrams will require you to remove both the upper and lower plastic diaphragm “cinch” rings (with wire cutters, etc.) and carefully slide these new diaphrams over the top lip of piston and onto the “neck” of the piston (where those cinch rings used to sit). The diaphragm is held in place entirely by a tight friction fit. Installation instructions are included. These are a decent solution when you have missing, damaged, or leaky vac pistons diaphrams. NOTE: it is strongly suggested that all of your original diaphrams are replaced (even if some in your carb set are still good), as these new diaphrams will not provide exactly the same vacuum-regulated response as old, original diaphrams.


HCP17537 Aftermarket Hitachi HSC32 and HSC33 series carbs VACUUM PISTON DIAPHRAM ONLY, fits all XJ650 (except Turbo), all XJ700 air-cooled models, and all 1981-84 XJ750 models. This is the rubber diaphram only, please see the NOTE above in regards to the installation and use of this product. Each:
$ 27.95

HCP17537SET4 Aftermarket Hitachi VACUUM PISTON DIAPHRAMS ONLY, set of 4:
$ 99.95



HCP17538 Aftermarket Hitachi HSC40 series carbs VACUUM PISTON DIAPHRAM ONLY, fits all 1984-87 XV700, 1981-83 XV750, 1981-83 all XV920, 1984-85 XV1000, and 1986-87 XV1100 models that use Hitachi carbs (note that some XV1100 models use Mikuni carbs). This is the rubber diaphram only, please see the NOTE above in regards to the installation and use of this product. Each:
$ 27.95

HCP17538SET2 Aftermarket Hitachi VACUUM PISTON DIAPHRAMS ONLY, set of 2:
$ 54.95

 

HITACHI CARB HATS:

Reproduction Hitachi CARB DIAPHRAM COVERS, commonly called carb "hats", are the bright polished upper covers with the "sloped dome" shape. Brand new stampings perfectly replace rusted and pitted originals, add a final "crowning" touch to your carb restoration project. All hats will fit any position on all Hitachi HSC32 or HSC33 series carbs as used on the XJ-series bikes.

Original usage is as follows:

North American XJ650 (except Turbo or Midnight Maxim models): uses chrome hats on all 4 carbs.
non-North American XJ650 (except Turbo models): uses chrome hats on the outboard (#1 and #4) carbs, and zinc-plated hats on the two inner carbs (#2 and #3).
XJ650 Midnight Maxim models: use golden-chrome hats on all 4 carbs.

North American XJ700 air-cooled models: uses chrome hats on the outboard (#1 and #4) carbs, and zinc-plated hats on the two inner carbs (#2 and #3).

North American XJ750 air-cooled models (except 1984 XJ750RL Seca and Midnight Maxim models): uses chrome hats on all 4 carbs.
non-North American XJ750 air-cooled models (except 1984 XJ750RL Seca models): uses chrome hats on the outboard (#1 and #4) carbs, and zinc-plated hats on the two inner carbs (#2 and #3).
XJ750 Midnight Maxim models: use golden-chrome hats on all 4 carbs.
1984 XJ750RL models: uses chrome hats on the outboard (#1 and #4) carbs, and zinc-plated hats on the two inner carbs (#2 and #3).


HCP9162 Aftermarket Hitachi POLISHED SILVER CHROME CARB HAT, brilliant mirror finish. Each:
$ 39.95

HCP9162SET2 Aftermarket Hitachi POLISHED SILVER CHROME CARB HATS, set of 2:
$ 74.95

HCP9162SET4 Aftermarket Hitachi POLISHED SILVER CHROME CARB HATS, set of 4:
$ 139.95



HCP9164 Aftermarket Hitachi ZINC-PLATED CARB HAT, dull silver finish. Each:
$ 37.95

HCP9164SET2 Aftermarket Hitachi ZINC-PLATED CARB HAT, set of 2:
$ 69.95



HCP29775 Complete set of 4 CARB HATS, contains two of the HCP9162 polished chrome hats, and two of the HCP9164 zinc-plated hats. This combination of covers is correct for the following models: all XJ650 (except Midnight Maxim or Turbo models), on all XJ700 air-cooled models, and all XJ750 air-cooled carbs (except XJ750 Midnight Maxim models)..
$ 134.95




HCP9163 Aftermarket Hitachi POLISHED GOLDEN CHROME CARB HAT, golden mirror finish as used on all fours carbs on all XJ650 Midnight Maxim and XJ750 Midnight Maxim models. Each:
$ 44.95

HCP9163SET2 Aftermarket Hitachi POLISHED GOLDEN CHROME CARB HATS, set of 2:
$ 84.95

HCP9163SET4 Aftermarket Hitachi POLISHED GOLDEN CHROME CARB HATS, set of 4:
$ 159.95




HCP29368-RP OEM Hitachi HSC34-series RE-PLATED POLISHED GOLDEN-CHROME CARB HAT, golden mirror finish as used on all three carbs on all 1980-81 XS850 Midnight Special models. Will also fit all 1980-81 XS850 Standard and Special carbs. NOTE: requires a $ 45.00 core charge, refundable upon the return of an undamaged, same-model carb hat; “undamaged” means no dents, dings, rust pits (top side), etc. Since these are re-plated used parts, we do require an exchange for your original parts so we can have a steady supply of parts to be processed and re-plated for future sales. These are used original parts, and as such, may have minor cosmetic flaws (tooling marks, fastener marks, etc.). Most such marks will not be visible once installed. Each:
$129 69.95 + refundable $ 45.00 core charge

HCP29368SET3-RP OEM Hitachi HSC34-series RE-PLATED POLISHED GOLDEN-CHROME CARB HATS, golden mirror finish as used on all fours carbs on all 1980-81 XS850 Midnight Special models. Set of 3:
$ 356.95 + refundable $ 135.00 core charge



HCP29830-RP OEM Hitachi HSC40-series RE-PLATED POLISHED GOLDEN-CHROME CARB HAT, golden mirror finish as used on all fours carbs on all 1983 XV750 Midnight Virago and 1983 XV920 Midnight Virago models. Will fit all 1981-83 XC750 and 1981-83 XV920 model carbs. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model carb hat; “undamaged” means no dents, dings, rust pits (top side), etc. Since these are re-plated used parts, we do require an exchange for your original parts so we can have a steady supply of parts to be processed and re-plated for future sales. These are used original parts, and as such, may have minor cosmetic flaws (tooling marks, fastener marks, etc.). Most such marks will not be visible once installed. Each:
$ 139.95 + refundable $ 25.00 core charge

HCP29830SET2-RP OEM Hitachi HSC40-series RE-PLATED POLISHED GOLDEN-CHROME CARB HATS, golden mirror finish as used on both carbs on all 1983 XV750 Midnight Virago and 1983 XV920 Midnight Virago models. Set of 2:
$ 259.95 + refundable $ 100.00 core charge



HITACHI CARB HAT HARDWARE:

Hitachi Carb Hat Brackets:

Our re-plated Hitachi diaphragm cover SHAFTS AND BRACKETS allow you to re-create the original look and beauty of these carb racks. These parts are available re-plated to their correct original yellow-zinc or black-zinc appearance. If you need to replace any missing hardware, or just want to create a show-winning look, then you should start your shopping list here! NOTE: all carb hat brackets and hardware are re-plated, used parts, and as such, may have minor cosmetic flaws (tooling marks, fastener marks, etc.). Most such marks will not be visible once installed. Also, all re-plated items require a refundable core charge which will be credited back to you once you return a same-model, same-type of item(s) as you purchased. Since these are re-plated used parts, we do require an exchange for your original parts so we can have a steady supply of parts to be processed and re-plated for future sales.


HCP347RP OEM re-plated carb hat CHOKE CABLE BRACKET, mounted on the #4 hat inner position. Beautiful yellow-zinc plating brings the top side of these carbs to life. Fits all HSC32-series carbs as used on XJ650 Maxim, XJ650 Euro, XJ650RJ Seca, 1981-83 XJ750 Maxim and Seca, and XJ750 Euro models. Will also fit all XJ650 Midnight Maxim and XJ750 Midnight Maxim models but has a non-correct finish. Does not include the HCP2425RP clamp or the HCP2426 clamp screw listed below. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 49.95 + $ 25.00 refundable core charge

HCP23261RP OEM re-plated carb hat CHOKE CABLE BRACKET, mounted on the #4 hat inner position. Beautiful yellow-zinc plating brings the top side of these carbs to life. Fits all HSC33-series carbs as used on XJ700 air-cooled and 1984 XJ750RL Seca models. Does not include the HCP2425RP clamp or the HCP2426 clamp screw listed below. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 59.95 + $ 25.00 refundable core charge

HCP2425RP OEM re-plated carb hat choke cable bracket CLAMP, mounts to the HCP347RP choke cable bracket listed above. Beautiful yellow-zinc plating brings the top side of these carbs to life. Fits all HSC32-series carbs as used on XJ650 Maxim, XJ650 Euro, XJ650RJ Seca, XJ700 air-cooled models, 1981-83 XJ750 Maxim and Seca, and XJ750 Euro models. Will also fit all XJ650 Midnight Maxim and XJ750 Midnight Maxim models but has a non-correct finish. Does not include the HCP2426 clamp screw listed below. NOTE: requires a $ 15.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 24.95 + $ 15.00 refundable core charge

HCP2426RP OEM re-plated carb hat choke cable bracket CLAMP SCREW, mounts the choke cable clamp to the choke cable bracket on all XJ650 Maxim, XJ650 Midnight Maxim, XJ650 Euro, XJ650RJ Seca, XJ700 air-cooled models, 1981-83 XJ750 Maxim and Seca, XJ750 Midnight Maxim, and XJ750 Euro models. Beautiful yellow-zinc plating brings the top side of these carbs to life. NOTE: requires a $ 10.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 14.95 + $ 10.00 refundable core charge


HCP5407RP OEM re-plated carb hat CHOKE CABLE BRACKET, mounted on the #4 hat inner position. Beautiful black-zinc plating brings the top side of these carbs to life. Fits all HSC32-series carbs as used on XJ650 Midnight Maxim and 1983-84 XJ750 Midnight Maxim models. Does not include the HCP5408RP clamp or the HCP2426 clamp screw listed below. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 59.95 + $ 25.00 refundable core charge

HCP5408RP OEM re-plated carb hat choke cable bracket CLAMP, mounts to the HCP347RP choke cable bracket listed above. Black-zinc plating as original. Fits all HSC32-series carbs as used on XJ650 Midnight Maxim and 1983-84 XJ750 Midnight Maxim models. Does not include the HCP2426 clamp screw listed below. NOTE: requires a $ 15.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 29.95 + $ 15.00 refundable core charge

HCP2426RP OEM re-plated carb hat choke cable bracket CLAMP SCREW, mounts the choke cable clamp to the choke cable bracket on all XJ650 Maxim, XJ650 Midnight Maxim, XJ650 Euro, XJ650RJ Seca, XJ700 air-cooled models, 1981-83 XJ750 Maxim and Seca, XJ750 Midnight Maxim, and XJ750 Euro models. Beautiful yellow-zinc plating brings the top side of these carbs to life. NOTE: requires a $ 10.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 14.95 + $ 10.00 refundable core charge



HCP346RP OEM re-plated carb hat THROTTLE CABLE BRACKET, mounted on the #3 hat inner position. Beautiful yellow-zinc plating brings the top side of these carbs to life. Fits all HSC32- and HSC33-series carbs as used on XJ650 (except Turbo), XJ700 air-cooled, 1981-84 XJ750, and XJ750 Euro models. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 49.95 + $ 25.00 refundable core charge




Hitachi Carb Hat Clips:

HCP21520 Aftermarket Hitachi HSC32-series carb hat VACUUM HOSE ROUTING CLIP, use one on the #2 carb rear inner carb hat screw position, on all XJ650 (except Turbo) and 1981-83 XJ750 engines. This “shepherd’s crook” bright plated clip routes the vacuum hose (in the “crook” part of the clip) away from obstacles. Use 1 per carb bank. Perfectly replaces a commonly missing or rusted original. Use 1 per carb. Each:
$ 12.95

HCP21523 Aftermarket petcock-to-intake manifold VACUUM HOSE ROUTING CLIP, use one on the #2 carb front inner carb hat screw position, on all XJ700 air-cooled engines. This “shepherd’s crook” bright plated clip routes the vacuum hose (in the “crook” part of the clip) away from obstacles. Use 1 per carb bank. Perfectly replaces a commonly missing or rusted original. Use 1 per carb. Each:
$ 12.95

HCP21526 Aftermarket carb body port VACUUM HOSE ROUTING CLIP, use one on the #1 and the #4 carb upper rack bracket outer screw position, on all 1985 XJ700 air-cooled engines. This small bright plated clip routes the long vacuum hose (in the “crook” part of the clip), that comes off the mixture screw ports, away from obstacles. Perfectly replaces a commonly missing or rusted original. Use 2 per carb bank. Each:
$ 12.95




Hitachi Carb Hat Fasteners:

h5) Hitachi carb diaphram cover (chrome "dome" or "Hat") individual MOUNTING SCREWS AND HARDWARE, available in different materials and finishes to suit your needs. Also see our complete CARB HARDWARE KITS listed further below for the best deal and ease of ordering!

Here’s are some quick guides that shows the different fastener head and drive styles:



https://www.boltdepot.com/fastener-information/Printable-Tools/Type-Chart.pdf

http://www.oocities.org/dtmcbride/home_garden/fasteners.html


HSC32 model carbs ----used on all XJ650 and XJ750 with Hitachi carbs except the XJ700 air-cooled models and XJ750RL Seca (1984) models, use the following screw configuration:

The short screws are used in any position that does not have a clip or bracket associated with it. You will need to use a total of 10 of these short screws per complete carb rack.

The mid-length screws are used in any position that has a clip or bracket associated with it. You will need to use a total of 6 of these mid-length screws per complete carb rack on the HSC32 model carbs.


HSC33 model carbs ----used on all XJ700 air-cooled models and the 1984 XJ750RL Seca models, use the following screw configuration:

Eleven of the mid-length screws, used in all positions except for the positions which secure the end covers, and for the position that secures the vacuum line clip on the #2 carb.

Five of the long screws, used on the outer carbs outer positions (with the carb end covers) and on the #2 carb with the vacuum line clip.


NOTE: originally, all carb hat screws had a bright zinc-plated finish, panhead style, phillips-drive with a captive lock washer. Current OEM screws and all aftermarket screws do NOT have an integral lock washer and the lock washer must be ordered separately from the choices listed further below.

Replacement screws come in a variety of different finish and head drive styles, so please review the descriptions below carefully!



- These replacement panhead, phillips-drive screws have a bright, zinc-plated finish and are made from alloy steel. Use with the HCP326 or HCP922 lock washers listed further below:

HCP322 OEM Hitachi carb hat short MOUNTING SCREW, zinc-plated alloy-steel, panhead, phillips-drive, each:
$ 6.95

HCP322SET10 OEM Hitachi carb hat short MOUNTING SCREWS, set of 10:
$ 59.95



HCP323 OEM Hitachi carb hat mid-length MOUNTING SCREW, zinc-plated alloy-steel, panhead, phillips-drive, each:
$ 1.95

HCP323SET6 OEM Hitachi carb hat mid-length MOUNTING SCREWS, set of 6:
$ 10.95

HCP323SET11 OEM Hitachi carb hat mid-length MOUNTING SCREWS, set of 11:
$ 18.25



HCP4190 OEM Hitachi carb hat long MOUNTING SCREW, zinc-plated alloy-steel, panhead, phillips-drive, each:
$ 6.95

HCP4190SET5 OEM Hitachi carb hat long MOUNTING SCREWS, set of 5:
$ 33.95



HCP918 Aftermarket Hitachi carb hat short MOUNTING SCREW, zinc-plated alloy-steel, panhead, phillips-drive, each:
$ 1.95

HCP918SET10 Aftermarket Hitachi carb hat short MOUNTING SCREWS, set of 10:
$ 17.95



HCP25913 Aftermarket Hitachi carb hat short MOUNTING SCREW, bright zinc-plated alloy steel, panhead, phillips drive, JIS small-head design as original, each:
$ 3.95

HCP25913SET10 Aftermarket Hitachi carb hat short MOUNTING SCREWS, set of 10:
$ 36.95



HCP919 Aftermarket Hitachi carb hat mid-length MOUNTING SCREW, zinc-plated alloy-steel, panhead, phillips-drive, each:
$ 1.95

HCP919SET6 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 6:
$ 10.95

HCP919SET11 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 11:
$ 18.25



HCP6418 Aftermarket Hitachi carb hat long MOUNTING SCREW, zinc-plated alloy-steel, panhead, phillips-drive, each:
$ 1.95

HCP6418SET5 Aftermarket Hitachi carb hat long MOUNTING SCREWS, set of 5:
$ 8.50




- These replacement panhead, phillips-drive screws have a polished head and are made from an 18-8 stainless steel. Use with the HCP336 lock washers listed further below:

HCP1355 Aftermarket Hitachi carb hat short MOUNTING SCREW, 18-8 stainless-steel, polished panhead, phillips-drive, each:
$ 2.95

HCP1355SET10 Aftermarket Hitachi carb hat short MOUNTING SCREWS, set of 10:
$ 21.95



HCP2641 Aftermarket Hitachi carb hat mid-length MOUNTING SCREW, 18-8 stainless-steel, polished panhead, phillips-drive, each:
$ 2.95

HCP2641SET6 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 6:
$ 14.95

HCP2641SET11 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 11:
$ 22.95



HCP6420 Aftermarket Hitachi carb hat long MOUNTING SCREW, bright 18-8 stainless steel, panhead phillips-drive screw, each:
$ 1.95

HCP6420SET5 Aftermarket Hitachi carb hat long MOUNTING SCREWS, set of 5:
$ 8.95



HCP6421 Aftermarket Hitachi carb hat long MOUNTING SCREW, bright 18-8 stainless steel, small-head (JIS) panhead phillips-drive like original, each:
$ 3.95

HCP6421SET5 Aftermarket Hitachi carb hat long MOUNTING SCREWS, set of 5:
$ 17.95





- These replacement button-head, hex-drive screws have a polished head and are made from an 18-8 stainless steel. Use with the HCP336 lock washers listed further below:

HCP332 Aftermarket Hitachi carb hat short MOUNTING SCREW, 18-8 stainless-steel, polished button head, hex-drive, each:
$ 2.95

HCP332SET10 Aftermarket Hitachi carb hat short MOUNTING SCREWS, set of 10:
$ 21.95



HCP333 Aftermarket Hitachi carb hat mid-length MOUNTING SCREW, 18-8 stainless-steel, polished button head, hex-drive, each:
$ 2.95

HCP333SET6 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 6:
$ 14.95

HCP333SET11 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 11:
$ 22.95



HCP14239 Aftermarket Hitachi carb hat long MOUNTING SCREW, 18-8 stainless-steel, polished button head, hex-drive, each:
$ 2.95

HCP14239SET5 Aftermarket Hitachi carb hat long MOUNTING SCREWS, set of 5:
$ 11.95




- These replacement socket-head, hex-drive screws have a smooth polished head and are made from an 18-8 stainless steel. Use with the HCP336 lock washers listed further below:

HCP329 Aftermarket Hitachi carb hat short MOUNTING SCREW, 18-8 stainless steel, smooth polished socket head, hex-drive, each:
$ 1.95

HCP329SET10 Aftermarket Hitachi carb hat short MOUNTING SCREWS, set of 10:
$ 17.95



HCP330 Aftermarket Hitachi carb hat mid-length MOUNTING SCREW, 18-8 stainless steel, smooth polished socket head, hex-drive, each:
$ 2.95

HCP330SET6 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 6:
$ 14.95

HCP330SET11 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 11:
$ 22.95



HCP6424 Aftermarket Hitachi carb hat long MOUNTING SCREW, 18-8 stainless steel, smooth polished socket head, hex-drive, each:
$ 2.95

HCP6424SET5 Aftermarket Hitachi carb hat long MOUNTING SCREWS, each:
$ 11.95




- These replacement socket-head, hex-drive screws have a ribbed head with a black oxide-coated finish and are made from alloy steel. Use with the HCP342 lock washers listed further below:

HCP339 Aftermarket Hitachi carb hat short MOUNTING SCREW, black oxide-coated steel, ribbed socket head, hex-drive, each:
$ 1.95

HCP339SET10 Aftermarket Hitachi carb hat short MOUNTING SCREWS, set of 10:
$ 17.95



HCP340 Aftermarket Hitachi carb hat mid-length MOUNTING SCREW, black oxide-coated steel, ribbed socket head, hex-drive, each:
$ 1.95

HCP340SET6 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 6:
$ 10.95

HCP340SET11 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 11:
$ 18.25



HCP6423 Aftermarket Hitachi carb hat long MOUNTING SCREW, black oxide-coated steel, ribbed socket head, hex-drive, each:
$ 1.95

HCP6423SET5 Aftermarket Hitachi carb hat long MOUNTING SCREWS, each:
$ 8.50




k5) Hitachi carb diaphram cover mounting screw LOCK WASHER.

NOTE: originally, these washers were integral to the mounting screws and featured a bright, zinc-plated finish. Current OEM screws and all aftermarket screws do NOT have an integral lock washer and thus the lock washers must be ordered separately from the choices listed below. These lock washers will fit all of the mounting screws listed above.

HSC32 model carbs ----used on all XJ650 and XJ750 with Hitachi carbs except the XJ700 air-cooled models and XJ750RL Seca (1984) models, use lockwashers on the following screw positions:

All sixteen (16) carb hat screw positions.


HSC33 model carbs ----used on all XJ700 air-cooled models and the 1984 XJ750RL Seca models, use lockwashers on the following screw positions:

All positions that use a long hat screw also use a lockwasher -----used on the outer carbs outer positions (with the carb end covers) and on the #2 carb with the vacuum line clip, a total of 5 per rack.


HCP326 OEM Hitachi carb hat mounting screw LOCK WASHER, zinc-plated alloy steel, each:
$ 3.95

HCP326SET4 OEM Hitachi carb hat mounting screw LOCK WASHERS, set of 4:
$ 14.95

HCP326SET5 OEM Hitachi carb hat mounting screw LOCK WASHERS, set of 5:
$ 17.95

HCP326SET16 OEM Hitachi carb hat mounting screw LOCK WASHERS, set of 16:
$ 54.95



HCP922 Aftermarket Hitachi carb hat mounting screw LOCK WASHER, zinc-plated alloy steel, each:
$ 1.95

HCP922SET4 Aftermarket Hitachi carb hat mounting screw LOCK WASHERS, set of 4:
$ 6.95

HCP922SET5 Aftermarket Hitachi carb hat mounting screw LOCK WASHERS, set of 5:
$ 7.95

HCP922SET16 Aftermarket Hitachi carb hat mounting screw LOCK WASHERS, set of 16:
$ 22.95



HCP336 Aftermarket Hitachi carb hat mounting screw LOCK WASHER, 18-8 stainless-steel, each:
$ 2.95

HCP336SET4 Aftermarket Hitachi carb hat mounting screw LOCK WASHERS, set of 4:
$ 10.95

HCP336SET5 Aftermarket Hitachi carb hat mounting screw LOCK WASHERS, set of 5:
$ 12.95

HCP336SET16 Aftermarket Hitachi carb hat mounting screw LOCK WASHERS, set of 16:
$ 29.95



HCP342 Aftermarket Hitachi carb hat mounting screw LOCK WASHER, black oxide-coated alloy steel, each:
$ 1.95

HCP342SET4 Aftermarket Hitachi carb hat mounting screw LOCK WASHERS, set of 4:
$ 6.95

HCP342SET5 Aftermarket Hitachi carb hat mounting screw LOCK WASHERS, set of 5:
$ 7.95

HCP342SET16 Aftermarket Hitachi carb hat mounting screw LOCK WASHERS, set of 16:
$ 22.95



k5) Hitachi carb diaphram cover mounting screw FLAT WASHER.

NOTE: originally, these washers were integral to the mounting screws and featured a bright, zinc-plated finish. Current OEM screws and all aftermarket screws do NOT have an integral lock washer and thus the lock washers must be ordered separately from the choices listed below. These lock washers will fit all of the mounting screws listed above.

HSC32 model carbs ----used on all XJ650 and XJ750 with Hitachi carbs except the XJ700 air-cooled models and XJ750RL Seca (1984) models, use flat washers on the following screw positions:

Use 1 per carb rack, on the #2 carb rear position where the vacuum line clip attaches (this position receives both a lock washer and a flat washer).


HSC33 model carbs ----used on all XJ700 air-cooled models and the 1984 XJ750RL Seca models, use flat washers on the following screw positions:

All positions that use a long hat screw also use a flat washer -----used on the outer carbs outer positions (with the carb end covers) and on the #2 carb with the vacuum line clip, a total of 5 per rack.


HCP328 OEM Hitachi carb hat mounting screw FLAT WASHER, zinc-plated alloy-steel, each:
$ 3.95

HCP328SET5 OEM Hitachi carb hat mounting screw FLAT WASHERS, set of 5:
$ 17.95


HCP924 Aftermarket Hitachi carb hat mounting screw FLAT WASHER, zinc-plated alloy-steel, each:
$ 1.95

HCP924SET5 Aftermarket Hitachi carb hat mounting screw FLAT WASHERS, set of 5:
$ 7.95


HCP338 Aftermarket Hitachi carb hat mounting screw FLAT WASHER, 18-8 stainless-steel, each:
$ 2.95

HCP338SET5 Aftermarket Hitachi carb hat mounting screw FLAT WASHERS, set of 5:
$ 12.95


HCP28050 Aftermarket Hitachi carb hat mounting screw FLAT WASHER, grade 316 stainless-steel, each:
$ 3.95

HCP28050SET5 Aftermarket Hitachi carb hat mounting screw FLAT WASHERS, set of 5:
$ 17.95


HCP1356 Aftermarket Hitachi carb hat mounting screw FLAT WASHER, black oxide-coated alloy steel, each:
$ 1.95

HCP1356SET5 Aftermarket Hitachi carb hat mounting screw FLAT WASHER, set of 5:
$ 7.95




HITACHI CARB LOWER END PARTS:

AIR JET COVER PLATE:

Early Hitachi HSC32 series carbs (XJ650 except Turbo, 1981-83 XJ750 Maxim, Seca, and Euro models) have a crescent-moon shaped flat COVER PLATE over the air jets (top side of carbs, underneath the vacuum piston diaphragm). This plate and it’s special hold-down screw is not present on later versions of these carbs, and you will need to inspect your carbs carefully to see if the “third” (rear-most) hole in the air jet chamber is threaded to accept the hold-down screw (all of the Hitachi carbs have this hole drilled, but only those carbs that used the cover plate has the hole tapped/threaded to accept the cover plate and its hold-down screw).

Our re-plated Hitachi air jet COVER PLATE AND SCREW allow you to re-create the original look and beauty of these carb racks. These parts are available re-plated to their correct original yellow-zinc appearance. If you need to replace any missing hardware, or just want to create a show-winning look, then you should start your shopping list here! NOTE: all jet cover plates and screws are re-plated, used parts, and as such, may have minor cosmetic flaws (tooling marks, fastener marks, etc.). Most such marks will not be visible once installed. Also, all re-plated items require a refundable core charge which will be credited back to you once you return a same-model, same-type of item(s) as you purchased. Since these are re-plated used parts, we do require an exchange for your original parts so we can have a steady supply of parts to be processed and re-plated for future sales.


HCP289RP OEM re-plated air jet chamber COVER PLATE, use 1 per carb on all models that originally used them. Fits all XJ650 (except Turbo) and air-cooled XJ750 engines with Hitachi carbs that have the rear-most hole threaded. Correct yellow-zinc plated cover. NOTE: requires a $ 5.00 core charge, refundable upon the return of an undamaged, same-model, same-type plate.
Each:
$ 27.95 + $ 5.00 refundable core charge

HCP290RP OEM re-plated air jet chamber COVER PLATE SCREW, use 1 per carb on all models that originally used them. Fits all XJ650 (except Turbo) and air-cooled XJ750 engines with Hitachi carbs that have the rear-most hole threaded. Correct yellow-zinc plated, special flanged screw is used with the HCP289RP cover plate above. NOTE: requires a $ 5.00 core charge, refundable upon the return of an undamaged, same-model, same-type screw.
Each:
$ 21.95 + $ 5.00 refundable core charge





HITACHI MAIN FUEL JETS:

ee) Aftermarket Hitachi brass MAIN FUEL JETS, sizes as follows, fits all XJ650 (except Turbo), all XJ750 air-cooled models, all XJ700 air-cooled models, all XS850 models, and all XV (Virago) models using the HSC40-series carbs.

NOTE: stock Hitachi XJ series carbs used the following original sizes:

#102: XJ750E-II models (cylinders #2 & #3)

#105: XJ750E-II models (cylinders #1 & #4)

#106: *1984 XJ750RL Seca models.

#107: all XJ700 non-X models.

#110: all XJ650 North American models (except 1982-84 Canadian models), all 1980-81 XJ650 UK/European (4K0 and 4K1) models, and all XJ650 Police (37G) models.

#112: all 1982-84 XJ650 UK/European (11N and 14R) models and 1982-84 XJ650 Canadian models.

#118: all XJ750 Police (24L and 37H) models.

#120: all XJ750 North American and UK/European models except the 1984 XJ750RL models.

#122: 1981-83 XV750 models and 1986-87 XV1100 models (on the #1 carb only)

#124: 1986-87 XV700 models (on the #1 carb only), 1981-82 XV920 RH/RJ models for the front cylinder (right side) carb, and 1984-85 XV1000 models (on the #1 carb only)

#126: all 1981-83 XV920 models: on 1981-82 XV920 RH/RJ models for the rear cylinder (left side) carb, and on the 1982-83 XV920 J/K/MK models, for the front cylinder (right side) carb.

#128: 1984-85 XV700 models (on the #1 carb), 1986-87 XV700 models (on the #2 carb), 1988 XV750 California models, 1982-83 XV920 J/K/MK models for the rear cylinder (left side) carb, 1986-87 XV1100 models (on the #2 carb only)

#130: 1980-81 XS850 models, but note this is a completely unique style jet which we do not offer

#132: 1984-87 XV700 models (on the #2 carb), 1984-85 XV1000 models (on the rear carb only)

#134: nothing stock


*NOTE: we have observed a number of XJ750RL (44X Canadian models) that use #107 main fuel jets rather than the #106 fuel jets as specified in factory manuals.

All the other sizes are for "tuning" or re-jetting purposes when changing intakes or exhaust systems.


HCP10228 Aftermarket Hitachi brass #102 MAIN FUEL JET, stock size for XJ750E-II models on cylinders #2 and #3, each:
$ 12.95

HCP10228SET4 Aftermarket Hitachi brass #102 MAIN FUEL JETS, set of 4:
$ 49.95


HCP10229 Aftermarket Hitachi brass #105 MAIN FUEL JET, stock size for XJ750E-II models on cylinders #1 and #4, each:
$ 12.95

HCP10229SET4 Aftermarket Hitachi brass #105 MAIN FUEL JETS, set of 4:
$ 49.95


HCP6316 Aftermarket Hitachi brass #106 MAIN FUEL JET, stock size for 1984 XJ750RL Seca models. NOTE: we have observed a number of XJ750RL (44X Canadian models) that use #107 main fuel jets rather than the #106 fuel jets as specified in factory manuals. Each:
$ 12.95

HCP6316SET4 Aftermarket Hitachi brass #106 MAIN FUEL JETS, set of 4:
$ 49.95


HCP6317 Aftermarket Hitachi brass #107 MAIN FUEL JET, stock size for XJ700 non-X models. NOTE: we have observed a number of XJ750RL (44X Canadian models) that use #107 main fuel jets rather than the #106 fuel jets as specified in factory manuals. Each:
$ 9.95

HCP6317SET4 Aftermarket Hitachi brass #107 MAIN FUEL JETS, set of 4:
$ 37.95


HCP6318 Aftermarket Hitachi brass #108 MAIN FUEL JET, not an original size, used for fuel mixture tuning purposes only, each:
$ 12.95

HCP6318SET4 Aftermarket Hitachi brass #108 MAIN FUEL JETS, set of 4:
$ 49.95


HCP6319 Aftermarket Hitachi brass #109 MAIN FUEL JET, not an original size, used for fuel mixture tuning purposes only, each:
$ 12.95

HCP6319SET4 Aftermarket Hitachi brass #109 MAIN FUEL JETS, set of 4:
$ 49.95


HCP10601 Aftermarket Hitachi brass #110 MAIN FUEL JET, stock size for all XJ650 North American models (except 1982-84 Canadian models), all 1980-81 XJ650 UK/European (4K0 and 4K1) models, and all XJ650 Police (37G) models, each:
$ 9.95

HCP10601SET4 Aftermarket Hitachi brass #110 MAIN FUEL JETS, set of 4:
$ 37.95


HCP10602 Aftermarket Hitachi brass #112 MAIN FUEL JET, stock size for all 1982-84 XJ650 UK/European (11N and 14R) models and 1982-84 XJ650 Canadian models, each:
$ 9.95

HCP10602SET4 Aftermarket Hitachi brass #112 MAIN FUEL JETS, set of 4:
$ 37.95


HCP8366 Aftermarket Hitachi brass #114 MAIN FUEL JET, not an original size, used for fuel mixture tuning purposes only, each:
$ 9.95

HCP8366SET4 Aftermarket Hitachi brass #114 MAIN FUEL JETS, set of 4:
$ 37.95


HCP10082 Aftermarket Hitachi brass #116 MAIN FUEL JET, not an original size, used for fuel mixture tuning purposes only, each:
$ 9.95

HCP10082SET4 Aftermarket Hitachi brass #116 MAIN FUEL JETS, set of 4:
$ 37.95


HCP10606 Aftermarket Hitachi brass #118 MAIN FUEL JET, stock size for all XJ750 Police (24L and 37H) models, each:
$ 9.95

HCP10606SET4 Aftermarket Hitachi brass #118 MAIN FUEL JETS, set of 4:
$ 37.95


HCP8365 Aftermarket Hitachi brass #120 MAIN FUEL JET, stock size for all XJ750 North American and UK/European models except the 1984 XJ750RL models, each:
$ 9.95

HCP8365SET4 Aftermarket Hitachi brass #120 MAIN FUEL JETS, set of 4:
$ 37.95


HCP10607 Aftermarket Hitachi brass #122 MAIN FUEL JET, stock size for 1981-83 XV750 models, 1986-87 XV1100 models (on the #1 carb only), each:
$ 9.95

HCP10607SET4 Aftermarket Hitachi brass #122 MAIN FUEL JETS, set of 4:
$ 37.95


HCP10608 Aftermarket Hitachi brass #124 MAIN FUEL JET, stock size for 11986-87 XV700 models (on the #1 carb only), 1981-82 XV920 RH/RJ models, and 1984-85 XV1000 models (on the #1 carb only), each:
$ 9.95

HCP10608SET4 Aftermarket Hitachi brass #124 MAIN FUEL JETS, set of 4:
$ 37.95


HCP10609 Aftermarket Hitachi brass #126 MAIN FUEL JET, stock size for all 1981-82 XV920 models, each:
$ 9.95

HCP10609SET4 Aftermarket Hitachi brass #126 MAIN FUEL JETS, set of 4:
$ 37.95


HCP10610 Aftermarket Hitachi brass #128 MAIN FUEL JET, stock size for 1984-85 XV700 models (on the #1 carb), 1986-87 XV700 models (on the #2 carb), 1988 XV750 California models, 1982-83 XV920 J/K/MK models, 1986-87 XV1100 models (on the #2 carb only), each:
$ 12.95

HCP10610SET4 Aftermarket Hitachi brass #128 MAIN FUEL JETS, set of 4:
$ 49.95


HCP10611 Aftermarket Hitachi brass #130 MAIN FUEL JET, not an original size, used for fuel mixture tuning purposes only, each:
$ 12.95

HCP10611SET4 Aftermarket Hitachi brass #130 MAIN FUEL JETS, set of 4:
$ 49.95


HCP10612 Aftermarket Hitachi brass #132 MAIN FUEL JET, stock size for 1984-87 XV700 models (on the #2 carb), 1984-85 XV1000 models (on the rear carb only), each:
$ 12.95

HCP10612SET4 Aftermarket Hitachi brass #132 MAIN FUEL JETS, set of 4:
$ 49.95


HCP11152 Aftermarket Hitachi brass #134 MAIN FUEL JET, not an original size, used for fuel mixture tuning purposes only, each:
$ 12.95

HCP11152SET4 Aftermarket Hitachi brass #134 MAIN FUEL JETS, set of 4:
$ 49.95




xx3) Aftermarket Hitachi main fuel jet SPACER WASHER, round flat copper washer goes under the head of the main fuel jet. Perfectly replaces missing or bowed originals on all HSC32/33/34/40-series carbs as used on all XJ650 (except Turbo), all XJ700 air-cooled, all XJ750 air-cooled, 1984-87 XV700, 1981-83 XV750, 1988 XV750 California models only, 1980-81 XS850, 1981-83 XV920, 1984-85 XV1000, and 1986-87 XV1100 carbs.

HCP887 Aftermarket Hitachi carbs main fuel jet SPACER WASHER, each:
$ 7.95

HCP887SET2 Aftermarket Hitachi carbs main fuel jet SPACER WASHER, set of 2:
$ 14.95

HCP887SET3 Aftermarket Hitachi carbs main fuel jet SPACER WASHER, set of 3:
$ 21.95

HCP887SET4 Aftermarket Hitachi carbs main fuel jet SPACER WASHERS, set of 4:
$ 27.95




HITACHI MAIN AIR JETS:

The main air jets on all Hitachi HSCxx series carbs are located under the vacuum piston diaphram, and are a small, brass "headless" screw-in jet. On some model carbs, these air jets live under a small, curved flay metal "cover plate" which is retained by a special shouldered screw (most later-model Hitachi carbs seem to have dispensed with this air jet cover plate, although its threaded mounting hole still remains in the carb body).

Replacement Hitachi main air jets are now available for these model carbs, in both their original sizes and in optional "tuning" sizes for use with pod filters or other special tuning purposes.


#50: all XJ650 models except Police models.

#55: all XJ650 Police (37G) models.

#70: all XJ700 non-X models, XJ750RL Seca models, and XJ750E-II models.

#80: all 1981-83 XJ750 North American models, 1981-84 XJ750 UK/European (11M) models, and XJ750 Police (24L and 37H) models.


NOTE: the Haynes workshop manual for the XJ650 and XJ750 models has the incorrect placement noted for these air jets----the main air jet and pilot air jets are reversed in their picture and caption. Just remember that the main air jet goes directly above the main fuel jet, and is thus located in the "center" of the three holes in this area:

www.xjbikes.com/forums/threads/carb-trouble.90485/page-2


HCP6305 Aftermarket Hitachi brass MAIN AIR JET #40, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6305SET4 Aftermarket Hitachi brass MAIN AIR JETS #40, set of 4:
$ 49.95


HCP6306 Aftermarket Hitachi brass MAIN AIR JET #45, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6306SET4 Aftermarket Hitachi brass MAIN AIR JETS #45, set of 4:
$ 49.95


HCP6307 Aftermarket Hitachi brass MAIN AIR JET #50, original size for all XJ650 (except 37G Police bikes) models. Each:
$ 12.95

HCP6307SET4 Aftermarket Hitachi brass MAIN AIR JETS #50, set of 4:
$ 49.95


HCP6308 Aftermarket Hitachi brass MAIN AIR JET #55, correct for XJ650 Police (37G) models. Each:
$ 12.95

HCP6308SET4 Aftermarket Hitachi brass MAIN AIR JETS #55, set of 4:
$ 49.95


HCP6309 Aftermarket Hitachi brass MAIN AIR JET #60, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6309SET4 Aftermarket Hitachi brass MAIN AIR JETS #60, set of 4:
$ 49.95


HCP6310 Aftermarket Hitachi brass MAIN AIR JET #65, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6310SET4 Aftermarket Hitachi brass MAIN AIR JETS #65, set of 4:
$ 49.95


HCP6311 Aftermarket Hitachi brass MAIN AIR JET #70, original size for all XJ700 non-X (air-cooled) models, XJ750RL Seca models, and XJ750E-II models. Each:
$ 12.95

HCP6311SET4 Aftermarket Hitachi brass MAIN AIR JETS #70, set of 4:
$ 49.95


HCP6312 Aftermarket Hitachi brass MAIN AIR JET #75, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6312SET4 Aftermarket Hitachi brass MAIN AIR JETS #75, set of 4:
$ 49.95


HCP6313 Aftermarket Hitachi brass MAIN AIR JET #80, original size for all 1981-83 XJ750 North American models, 1981-84 XJ750 UK/European (11M) models, and XJ750 Police (24L and 37H) models. Each:
$ 12.95

HCP6313SET4 Aftermarket Hitachi brass MAIN AIR JETS #80, set of 4:
$ 49.95


HCP6314 Aftermarket Hitachi brass MAIN AIR JET #85, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6314SET4 Aftermarket Hitachi brass MAIN AIR JETS #85, set of 4:
$ 49.95


HCP6315 Aftermarket Hitachi brass MAIN AIR JET #90, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6315SET4 Aftermarket Hitachi brass MAIN AIR JETS #90, set of 4:
$ 49.95





HITACHI PILOT FUEL JETS:

ff) Aftermarket Hitachi PILOT FUEL JET, sizes as follows, fits all XJ650 (except Turbo), all XJ750 air-cooled models, all XJ700 air-cooled models, and all XV700 and XV920 models using the Hitachi HSC40-series carbs.

NOTE: most bikes of this era were jetted quite lean from the factory, in order to meet EPA emissions regs at that time, and thus all of them --- even if everything else is completely stock --- can benefit from increasing the pilot jet size by 1 or 2 steps (example: if your stock jets are a size #40, going to a size #41 or #42 will likely provide a benefit in performance and drivability).


NOTE: stock Hitachi XJ series carbs used the following original sizes:

#36.5: all XJ700 air-cooled models.

#40: all 1980-83 XJ650 USA models, 1980-81 XJ650 Canadian models, 1982 XJ650RJ and RJC Seca Canadian models, 1980-82 XJ650 UK/European (4K0) models, 1981-83 all XJ750 USA models, XJ750E-II models, and 1984 XJ750RL Seca (Canada) models.

#41: all 1984 XJ750RL Seca (Australia), all 1981-83 XV750, and all XV920 models

#43: all 1982-84 XJ650 Canadian models, 1982-84 XJ650 UK/European (11N and 14R) models, 1981-83 XJ750 Maxim, Midnight Maxim Canadian models, 1981-84 XJ750 UK/European (11M) models, and XJ750 Police (24L and 37H) models.

#45: all XJ650 Police (37G) models.

Any of the fuel jet sizes can also be used for "tuning" or re-jetting purposes when changing intakes or exhaust systems.


NOTE: ensuring that your pilot fuel circuit is internally clear and free is one of the most difficult tasks to perform on these carbs due to its incredibly small size (so fuel varnish will accumulate and solidify in there over time):

www.xj4ever.com/inside%20your%20carbs.pdf

To make sure that your internal pilot fuel circuit is truly “zestfully clean” after your clearing efforts:

1. Drill out an old pilot fuel jet so that the straw from the carb cleaner fits snuggly in the hole (or some other suitable method of “sealing off” a straw into the pilot fuel jet passage where the jet screws into the carb body).
2. Leave the pilot air jet in, but block it off with a wooden q-tip that is covered with a bit of heat shrink tubing (or use your finger to firmly block it off).
3. Install the pilot screw without its o-ring, and set it to about 2.5 turns out from soft bottoming.
4. Blast the carb cleaner through the modified pilot jet and it should look something like this:

www.youtube.com/watch?v=5Qr2Y6G2Ejg

By the way, when using the spray-stream method of checking the passage, don't even THINK of putting your eye or face anywhere even NEAR the outflow path, unless you like a painful and potentially serious trip to the emergency room.


HCP6321 Aftermarket Hitachi brass #36.5 PILOT FUEL JET, original size for all XJ700 non-X (air-cooled) models, each:
$ 9.95

HCP6321SET4 Aftermarket Hitachi brass #36.5 PILOT FUEL JETS, set of 4:
$ 37.95


HCP13606 Aftermarket Hitachi brass #38 PILOT FUEL JET, not an original size, used for fuel mixture tuning purposes only, each:
$ 9.95

HCP13606SET4 Aftermarket Hitachi brass #38 PILOT FUEL JETS, set of 4:
$ 37.95


HCP13607 Aftermarket Hitachi brass #39 PILOT FUEL JET, not an original size, used for fuel mixture tuning purposes only, each:
$ 9.95

HCP13607SET4 Aftermarket Hitachi brass #39 PILOT FUEL JETS, set of 4:
$ 37.95


HCP885 Aftermarket Hitachi brass #40 PILOT FUEL JET, original size for all 1980-83 XJ650 USA models, 1980-81 XJ650 Canadian models, 1982 XJ650RJ and RJC Seca Canadian models, 1980-82 XJ650 UK/European (4K0) models, 1981-83 all XJ750 USA models, XJ750E-II models, and 1984 XJ750RL Seca (Canada) models. Each:
$ 9.95

HCP885SET4 Aftermarket Hitachi brass #40 PILOT FUEL JETS, set of 4:
$ 37.95


HCP886 Aftermarket Hitachi brass #41 PILOT FUEL JET, original size for all 1984 XJ750RL Seca (Australia), all 1981-83 XV750, and all XV920 models, each:
$ 9.95

HCP886SET4 Aftermarket Hitachi brass #41 PILOT FUEL JETS, set of 4:
$ 37.95


HCP6326 Aftermarket Hitachi brass #42 PILOT FUEL JET, not an original size, used for fuel mixture tuning purposes only, each:
$ 9.95

HCP6326SET4 Aftermarket Hitachi brass #42 PILOT FUEL JETS, set of 4:
$ 37.95


HCP6320 Aftermarket Hitachi brass #43 PILOT FUEL JET, original size for all 1982-84 XJ650 Canadian models, 1982-84 XJ650 UK/European (11N and 14R) models, 1981-83 XJ750 Maxim, Midnight Maxim Canadian models, 1981-84 XJ750 UK/European (11M) models, and XJ750 Police (24L and 37H) models, each:
$ 9.95

HCP6320SET4 Aftermarket Hitachi brass #43 PILOT FUEL JETS, set of 4:
$ 37.95


HCP24234 Aftermarket Hitachi brass #44 PILOT FUEL JET, not an original size, used for fuel mixture tuning purposes only, each:
$ 9.95

HCP24234SET4 Aftermarket Hitachi brass #44 PILOT FUEL JETS, set of 4:
$ 37.95


HCP9661 Aftermarket Hitachi brass #45 PILOT FUEL JET, original size for all XJ650 Police (37G) models, each:
$ 9.95

HCP9661SET4 Aftermarket Hitachi brass #45 PILOT FUEL JETS, set of 4:
$ 37.95


HCP9815 Aftermarket Hitachi brass #46 PILOT FUEL JET, not an original size, used for fuel mixture tuning purposes only, each:
$ 12.95

HCP9815SET4 Aftermarket Hitachi brass #46 PILOT FUEL JETS, set of 4:
$ 49.95


HCP9816 Aftermarket Hitachi brass #47 PILOT FUEL JET, not an original size, used for fuel mixture tuning purposes only, each:
$ 12.95

HCP9816SET4 Aftermarket Hitachi brass #47 PILOT FUEL JETS, set of 4:
$ 49.95


HCP12616 Aftermarket Hitachi brass #50 PILOT FUEL JET, not an original size, used for fuel mixture tuning purposes only, each:
$ 12.95

HCP12616SET4 Aftermarket Hitachi brass #50 PILOT FUEL JETS, set of 4:
$ 49.95



HITACHI PILOT AIR JETS:

The pilot air jets on all Hitachi HSCxx series carbs are located under the vacuum piston diaphram, and are a small, brass "headless" screw-in jet. On some model carbs, these air jets live under a small, curved "cover plate" which is retained by a special shouldered screw (most later-model Hitachi carbs seem to have dispensed with this air jet cover plate, although its threaded mounting hole still remains in the carb body).

Replacement Hitachi pilot air jets are now available for these model carbs, in both their original sizes and in optional "tuning" sizes for use with pod filters or other special tuning purposes.


#195: all 1980-81 all XJ650 North American models, all 1982 XJ650RJ and RJC Seca, all 1980-82 XJ650 UK/European (4K0 and 4K1) models, 1981-83 XJ750 Canadian, and all XJ650 Police (37G) and XJ750 Police (24L and 37H) models.

#205: all 1982-84 XJ650 Maxim North American models, 1982-84 XJ650 UK/European (11N) models, and 1981-84 XJ750 UK/European (11M) models.

#210: all XJ700 non-X models.

#225: all 1982 XJ650 UK/European (14R) models, all 1981-83 XJ750 USA models, XJ750E-II models, and XJ750RL models.


NOTE: the Haynes workshop manual for the XJ650 and XJ750 models has the incorrect placement noted for these air jets----the main air jet and pilot air jets are reversed in their picture and caption. Just remember that the main air jet goes directly above the main fuel jet, and is thus located in the "center" of the three holes in this area:

www.xjbikes.com/forums/threads/carb-trouble.90485/page-2


HCP6289 Aftermarket Hitachi brass PILOT AIR JET #175, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6289SET4 Aftermarket Hitachi brass PILOT AIR JETS #175, set of 4:
$ 49.95


HCP6290 Aftermarket Hitachi brass PILOT AIR JET #180, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6290SET4 Aftermarket Hitachi brass PILOT AIR JETS #180, set of 4:
$ 49.95


HCP6291 Aftermarket Hitachi brass PILOT AIR JET #185, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6291SET4 Aftermarket Hitachi brass PILOT AIR JETS #185, set of 4:
$ 49.95


HCP6292 Aftermarket Hitachi brass PILOT AIR JET #190, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6292SET4 Aftermarket Hitachi brass PILOT AIR JETS #190, set of 4:
$ 49.95


HCP6293 Aftermarket Hitachi brass PILOT AIR JET #195, original size for all 1980-81 all XJ650 North American models, all 1982 XJ650RJ and RJC Seca, 1980-82 XJ650 UK/European (4K0 and 4K1) models, 1981-83 XJ750 Canadian, and some XJ750 Euro models. Each:
$ 12.95

HCP6293SET4 Aftermarket Hitachi brass PILOT AIR JETS #195, set of 4:
$ 49.95


HCP6294 Aftermarket Hitachi brass PILOT AIR JET #200, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6294SET4 Aftermarket Hitachi brass PILOT AIR JETS #200, set of 4:
$ 49.95


HCP6295 Aftermarket Hitachi brass PILOT AIR JET #205, original size for all 1982-84 XJ650 Maxim North American models, 1982-84 XJ650 UK/European (11N) models, and 1981-84 XJ750 UK/European (11M) models. Each:
$ 12.95

HCP6295SET4 Aftermarket Hitachi brass PILOT AIR JETS #205, set of 4:
$ 49.95


HCP6296 Aftermarket Hitachi brass PILOT AIR JET #210, original size for all 1985-86 XJ700 air-cooled engines. Each:
$ 12.95

HCP6296SET4 Aftermarket Hitachi brass PILOT AIR JETS #210, set of 4:
$ 49.95


HCP6297 Aftermarket Hitachi brass PILOT AIR JET #215, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6297SET4 Aftermarket Hitachi brass PILOT AIR JETS #215, set of 4:
$ 49.95


HCP6298 Aftermarket Hitachi brass PILOT AIR JET #220, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6298SET4 Aftermarket Hitachi brass PILOT AIR JETS #220, set of 4:
$ 49.95


HCP6299 Aftermarket Hitachi brass PILOT AIR JET #225, original size for all 1982 XJ650 UK/European (14R) models, all 1981-83 XJ750 USA models, XJ750E-II models, and XJ750RL models. Each:
$ 12.95

HCP6299SET4 Aftermarket Hitachi brass PILOT AIR JETS #225, set of 4:
$ 49.95


HCP6300 Aftermarket Hitachi brass PILOT AIR JET #230, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6300SET4 Aftermarket Hitachi brass PILOT AIR JETS #230, set of 4:
$ 49.95


HCP6301 Aftermarket Hitachi brass PILOT AIR JET #235, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6301SET4 Aftermarket Hitachi brass PILOT AIR JETS #235, set of 4:
$ 49.95


HCP6302 Aftermarket Hitachi brass PILOT AIR JET #240, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6302SET4 Aftermarket Hitachi brass PILOT AIR JETS #240, set of 4:
$ 49.95


HCP6303 Aftermarket Hitachi brass PILOT AIR JET #245, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6303SET4 Aftermarket Hitachi brass PILOT AIR JETS #245, set of 4:
$ 49.95


HCP6304 Aftermarket Hitachi brass PILOT AIR JET #250, not an original size, used for fuel mixture tuning purposes only. Each:
$ 12.95

HCP6304SET4 Aftermarket Hitachi brass PILOT AIR JETS #250, set of 4:
$ 49.95



WHAT ABOUT RE-JETTING FOR PODS, ETC?:

Before we even start down this bumpy road, let's get this out of the way: changing the mufflers (only) will generally not require re-jetting, as the stock mufflers are pretty darn free-flowing as it is. The major airflow restrictions (by design) in these engines is on the INTAKE side (the airbox system and its pleated paper filter). Changing to a high-flow air filter (like a K&N) will definitely require increased fuel jet sizing.

That being said, all of these bikes were jetted a bit lean from the factory, in order to satisfy EPA emissions requirements of that era. So even a stock engine can benefit from slightly larger fuel jets; for example, a stock XJ650 non-Turbo USA model, increasing fuel jet sizes to #112 on the mains (from the stock #110 size) and to a #41 on the pilot (stock is a #40 size) can be beneficial. Note that the pilot jet size is not as critical as the main jet size, since the pilot circuit mixture screw allows you to “open up” the pilot circuit independent of the jet size.


But what about when you do make other intake/exhaust system changes? It's a question we get asked often and unfortunately, one that we cannot answer honestly about your specific bike besides with "it depends".

Which is a nice way of saying "you're about to enter the seventh circle of hell......."!

Carb jet tuning required by aftermarket modifications is somewhat of a black art, part science, part skill, part luck. It depends on the current state of tune of your engine, your altitude, the mix of aftermarket parts on your bike, etc........a lot of variables.

The best advice we can offer is: Just Say No!. Don't do it! Leave everything stock!

But, since most people---with good reason, I might add---don't always listen to our well-intentioned advice, then the next best recommendation we can offer is: "if you want more power get a bigger bike!".

And since that doesn't cut it with many owners, either, for the remaining stalwarts out there who insist on "experimenting" with aftermarket intake and exhaust systems, here's the best information that we've come across to give you some GUIDANCE, which you should take as just that, and not as ANSWERS, because it isn't!

Definitely not plug-and-play:



And some pod filters make a difficult situation even worse.........read all about it:

http://www.caferacer.net/forum/technical/19639-pod-filter-thread-geeto.html

Yoji himself cautions against it:

http://xjbikes.com/forums/index.php?attachments/mikuni-article-jpg.15101



Also, if you’ve ever wondered what the numbers on your jets refer to:

- on Hitachi fuel jets, the numbers refer to the actual physical size of the passage hole expressed in millimeters, i.e. a #114 fuel jet is 1.14mm in diameter, a #42 fuel jet is 0.42mm in diameter, etc. Hitachi air jets are a whole different animal, measuring airflow volume at some (unknown) specific level of vacuum, and thus there is no direct (easily computed) relationship between the air jet passage diameter and the Hitachi "size" on their air jets.

- on Mikuni fuel jets, the numbers are a measurement of the volume (cc’s of gasoline) that will flow thru the jet when poured in from a height of 50cm. There is no direct (easily computed) relationship between the jet passage diameter and the Mikuni "size" on their fuel jets. And we do not know what Mikuni air jet numbers refer to…….although we suspect, as with Hitachi air jets, that it's a volume of air that can pass through the jet at some level of vacuum. Anyone who has insight into this issue please let us know more!



MAIN FUEL JET SIZE CHANGES NEEDED PER TYPICAL MODIFICATION:

Typical Exhaust Changes:

+2 main fuel jet size for custom 4-into-2 exhaust

or

+4 main fuel jet sizes for 4-into-1 exhaust

or

+4 main jet sizes for no muffler (open headers)


Typical Intake Changes:

+2 main fuel jet sizes for single K&N filter (inside a stock airbox)

or

+2 main fuel jet size for drilling holes in the airbox with stock filter

or

+4 main fuel jet sizes for individual pod filters (no airbox)


Additional changes:

- Add up all the main fuel jet size increases and subtract 2 sizes.

- Decrease main fuel jet size by 2 sizes per every 2000' above sea level.

- Under a mis-match condition, such as when using pod filters with a 100% stock exhaust, or 4-into-1 header with stock filter and air box, then subtract 2 main fuel jet sizes.



PILOT FUEL JET SIZES CHANGES NEEDED PER TYPICAL MODIFICATION:

Pilot fuel jet size changes are related only to the change in main fuel jet sizes according to the main fuel jet size formula described above. Note that this pilot fuel jet rule is for the main fuel jet size change BEFORE any main fuel jet altitude compensation is factored in:

Increase the pilot fuel jet size +1 for every +3 main fuel jet size increases.

Additional changes:

- Decrease pilot fuel jet size by 1 for every 6000' above sea level.



PRECAUTIONS:

- Make sure your carbs are in perfect working order before making ANY jet changes....meaning fully cleaned internally and rebuilt, operating properly in their stock configuration, proper sized air jets and needles, etc. Otherwise, you'll like find that all of your efforts are going to be a HUGE waste of time.

- Check plug color often and adjust as needed, 2 main fuel jet sizes at a time and 1 pilot fuel jet size at a time. Bright white plug insulators are a sign of an overly lean fuel mixture condition and WILL cause damage to your engine over time, up to and including engine seizure!

- Synch the carbs after each jet change.

- Make sure the floats are set correctly

- Seriously consider purchasing a Colortune Plug Tuning kit.

- You may find it necessary to make changes to the size or shimming of the main jet needle. There are no guidelines on what or how to do these changes, this is true trial-and-error tuning!



EXAMPLE:

A 1982 XJ750RJ Seca using an aftermarket Supertrapp 4-into-1 exhaust and a single K&N air filter in the stock, unmodified airbox. Bike is primarily operated at an altitude of 2600 feet above sea level.

XJ750 Seca Stock Hitachi HSC32 Carb Jetting:

#120 Main Fuel Jet
#40 Pilot Fuel Jet
#50 Main Air Jet
#225 Pilot Air Jet
Y-13 Needle


MAIN FUEL JET SIZE CALCULATIONS:

Changes made:

Exhaust:
4 into 1 with Supertrapp = +4 Sizes Main Fuel Jet

Intake:
K&N Pod Filters = +4 sizes Main Fuel Jet
----------------------------
Equals: +8 main fuel jet sizes above baseline
Subtract: -2 main fuel jet size per formula above
----------------------------
Equals: +6 main fuel jet sizes due to modifications, thus:

Stock main fuel jet size is: #120
+ 6 additional sizes
= a #126 main fuel jet size
---------------------------
Subtract: -2 main fuel jet sizes for Altitude of 2500' Average

= #126 calculated from above
-2 jet sizes for altitude adjustment

= a #124 main fuel jet size.


PILOT FUEL JET SIZE CALCULATIONS:

The formula is: +1 pilot jet size increase for every +3 main jet sizes increased.

Stock pilot fuel jet size is: #40
+ 2 additional jet sizes (since we went up +6 main fuel jet sizes before the altitude compensation was factored in):

= a #42 pilot fuel jet size.

Note that no altitude compensation is needed on the pilot fuel jet since our elevation is less than 6000' a-s-l.


------------------------------

RESULT:

A #124 Main and #42 Pilot is A GOOD STARTING POINT.

******************************************************

Note that the above calculations do NOT take into account any possible changes in the sizes of the main or pilot air jets, the main needle or main needle jet size, and thus are additional variables and opportunities for tuning excellence. These are areas which are largely unexplored by most tuners, but logically should allow for additional fine tuning or additional rage and frustration.........


Normally, changing to an aftermarket exhaust does NOT require re-jetting, (or minimal re-jetting) as almost ALL of the airflow restriction in the airflow path thru the engine (meaning: ATMOSPHERE > AIRBOX > FILTER > AIRBOX BOOTS > CARBS > INTAKE MANIFOLDS > CYLINDER HEAD PASSAGES > EXHAUST SYSTEM > BACK OUT INTO THE ATMOSPHERE) is within the intake side of this air flow path, and primarily within the stock airbox/air filter. Your stock EXHAUST system can already flow more air volume than the stock INTAKE system allows.

Thus changing only the stock EXHAUST system, with no changes to the intake side of the heads, normally makes NO DIFFERENCE IN TOTAL AIRFLOW, and "no difference in total airflow" means "no difference in TOTAL FUEL FLOW" either, and thus bigger jets are not needed.


But once you start freeing up the INTAKE side of the entire system, you will produce more system airflow, even with a stock exhaust system (because, the stock exhaust system has the capability to flow more air through it than what the stock intake system allows).

This is why re-jetting is usually needed even if you keep the stock airbox and the stock exhaust, but use a K&N low-restriction filter, or even if you drill holes in the stock airbox, or leave the filter lid off.

All such actions free up the intake side airflow restrictions; the stock exhaust will move this additional airflow, and without providing addition FUEL flow to match the increased airflow (within limits, an engine will gobble up the maximum amount of airflow that it can; an internal combustion engine is actually just a self-powered AIR PUMP) then the engine will run "lean"---meaning not enough fuel to match the amount of airflow that the engine can (and now will) gulp.

Most pod type filters allow for vastly increased airflow, and thus require fuel re-jetting, and although no one really talks much about it, probably also require AIR JET changes to match the additional fuel flow, but since no one likes to deal with two parameters at once, it becomes a "tuning nightmare".


BUT, when you read all of the common symptoms of people who use pods, you quickly come to the conclusion that it's not possible to reproduce the stock "smooth in all rpm ranges" engine response. The reality is that you SHOULD be able to match it pretty darn closely, even with the increased airflow through the system, but ONLY changing the fuel jets isn't going to accomplish that. There are also air jets in the system, and they are there for a reason, as well as needle tapers and vacuum piston responsiveness issues.


For further insights and understanding, the Holy Grail (meaning: the whole miserable, un-varnished truth of what a real chore carb tuning is going to be, written by people who actually know what they're talking about, rather than by people who are trying to sell you something) can be found at:

www.factorypro.com

and then click on the "Product Support/Technical Support" link at the top of the page, then on the "Motorcycle Tuning Tech" link, and then the "CV Carb Tuning" link........and then read, weep, study, and do....if you still dare to! HINT: if reading through it makes you think to yourself "sheesh, this sounds like an incredible amount of effort!", well, you're right! That's just some of the joys (and pitfalls) of getting to play "tuning engineer", which is what you're going to be doing. Yamaha probably has 10 of those types of guys on staff, and millions of dollars of test equipment, both physical and computer-aided, that allowed them to get the mixture settings just right---from an overall drivability AND power output standpoint----and now, since you're changing the airflow parameters thru the engine, you'll have to figure it all out "from scratch", but WITHOUT the benefit of 10 trained engineers and all that test equipment and experience.

That's why we warn you that setting up a bike for pods can be quite a bit of trial-and-error procedure. You can make the calculations according to what is shown in that guideline and then order the jets that the "formula" recommends, and that should serve as a good STARTING POINT............you may (or may not!) have to do more tuning and trial-and-erroring substitution of different jet sizes, etc. to get it performing to you satisfaction, with the recognition that you may ALWAYS end up with a situation that has some kinds of trade-offs.....lazy at the lower end but runs well at mid/upper-ranges, or runs well at the lower end but a "flat-spot" at some other rpm range, etc. Unfortunately there is no magic formula........you might want to read through the factorypro.com article that I list at the end of that section, and you will get a better understanding of what is involved to get the carbs set-up properly in a non-stock configuration.

As one of our favorite experts says about pod filters: "Get a Rubik's Cube instead.....it's less trouble and actually has an eventual solution!"

 

HITACHI MAIN FUEL JET NEEDLES:

Attached to the vacuum piston assembly is the MAIN JET NEEDLE, and as the vacuum piston is raised or lowered due to the vacuum signal through the carb throat, the main jet needle is raised or lowered into the brass emulsion tube (also described as the "main jet" or "power valve" in some technical literature). These jet needles control the overall fuel flow in the main jet circuit of each carb.

These precisely made aluminum replacement needles correctly replace worn, damaged, or incorrectly sized original needles in all Hitachi HSC32 or HSC33 series carbs. The needle "size" is inscribed on the shaft of all original needles, just below the plastic head cap. Although all needles are interchangeable between any type Hitachi HSC32 or HSC33 series carb, their different "sizes" are designed to be used in specific applications as determined by factory design engineers.

However, as long as all four carbs on your bike are using the same size needle, you can swap needle sizes between different carbs. So, for instance, you can use the Y-20 size needle (XJ700 USA models using the HSC33 series carbs) in an XJ750 engine (which normally used the Y-13 size needle in their HSC32 series carbs). This type of swapping of needles can be useful in situation where you may wish to fine-tune the fuel mixture in an engine, for instance when changing the air-flow through an engine using pod filters and/or aftermarket exhaust systems.

NOTE: many original Hitachi main jet needles have a depression on the bottom of the plastic cap, and this should be oriented with the half-circle bump inside the diaphragm


Original main needle size configurations are as follows:

Y-10: used on all USA market XJ650 (except Turbo) models, 1982-84 XJ650 Canadian bikes, and 1982 XJ650 Euro (model 14R) carbs.

Y-11: used on all 1980-81 XJ650 Euro (model 4K0 and 4K1) and XJ650 Police (37G) carbs.

Y-12: used on all Canadian 1980-81 XJ650 Maxim, Midnight Maxim, and Canadian 1982 XJ650RJC Seca (non-yics) models.

Y-13: used on all USA market XJ750 (1981-83) models.

Y-14: used on all non-USA market XJ750 (1981-84, except XJ750RL and XJ750E-II) models and XJ750 Police (24L and 37H) models.

Y-17: used on all XJ750E-II models.

Y-18: used on all XJ750RL Seca models (1984) only.

Y-19: used on all XJ700 air-cooled models (Canada)

Y-20: used on all XJ700 air-cooled models (USA)

All of the following size needles are used on Hitachi HSC40 series carbs, and are much longer (and do not interchange with) the HSC32/33 series needles above.

Y-22: 1981-82 XV920 RH/RJ models and 1981-83 XV750 models

Y-23: 1981-83 XV750 models

Y-24: 1982 XV920 J models

Y-25: 1982 XV920 J models

Y-29: all 1984-85 XV700 models, 1986 XV700SS on the #1 cylinder, and 1988 XV750 California models

Y-31: 1983 XV920 K models and 1983 XV920 MK models

Y-32: all 1986-87 XV700 models on the #1 cylinder

Y-33: all 1986-87 XV700 models on the #2 cylinder, 1983 XV920 K models, all 1984-85 XV1000 models, and all 1986-87 XV1100 models

Y-34: all 1984-85 XV1000 models


Original main needle size characteristics:

As noted previously, as long as all four needles are the same between all the carbs on your engine, you can swap around different sizes for "tuning" purposes. Although we have no guidelines nor experience available to assist you in your tuning exercises, we can offer these needle shape characteristics to help you in analyzing your needs. Be aware that the thickness of the needle at any position along its length determines the fuel flow through the main fuel circuit, and the rate of change of the needle thickness (the "taper" amount) determines when and how much the needle allows the fuel mixture to become leaner or richer.


- the Y-19 needles (XJ700 models Canada) are "skinnier" at the bottom of their shaft than all of the other stock Hitachi needles, thus the Y-19 needles are the "richest" needles at higher rpm ranges than any of the other needles (including the Y-20 or the HCP20965 needles).

- the Y-20 needles (XJ700 models USA) are "skinnier" at the bottom of their shaft than either the Y-13 (XJ750) or the Y-10 needles (XJ650). Thus the Y-20 needles are "richer" at higher rpm ranges than either the Y-10 or Y-13 needles.

- the Y-10 needles (XJ650 models) are "skinnier" at the bottom of their shaft than either the XJ750 Y-13 or Y-14 needles. Thus the Y-10 needles are "richer" than either the Y-13 or Y-14 needles, although the Y-20 (XJ700) needles are even richer, but only at wide-open throttle positions.

- the Y-11 needles (XJ650 Euro) are a bit leaner than Y-10 all the way through the rpm (needle position) range, especially at wide-open-throttle position. They are a bit richer than Y-13 needles, except at the wide-open-throttle position.

- the Y-13 needles (USA XJ750) are "richer" than the Y-20 needles (XJ700) throughout the rest of their overall length.

- the Y-14 needles (non-USA XJ750) are "richer" than the Y-13 needles (USA market XJ750) at 3/4-throttle positions and beyond; otherwise, almost identical to the Y-13 needle.

- the HCP20965 needles (custom) are the "richest" at all throttle positions except for the wide-open-throttle position characteristics of the Y-20 needles (XJ700).

- Summary: of all the stock needles, the Y-10 (XJ650) needles are, except for their lowest section, the "richest" stock needles available. The Y-19 (XJ700 air-cooled Canada) needles are the "richest" needles available for their lowest section, but then quickly become "leaner" needles past their lowest 1/3 range of length. The HCP20965 needles are the 2nd richest needles available at all throttle positions overall, and people who are running pods and other modifications on XJ700 and XJ750 air-cooled engines may wish to keep this thought in mind when trying to tune their engines.


One last thought: remember than fuel system tuning is mostly an art, rather than a science. The different size needles can produce very differing characteristics on any given engine, not only due to their relative "richness" or "leaness" characteristics, but also their rate of richness or leaness at any given needle position, along with the differences in main fuel jet sizing.


HCP8420 Aftermarket Hitachi Y-10 MAIN JET NEEDLE, correct for all USA market XJ650 (except Turbo) models, 1982-84 XJ650 Canadian bikes, and 1982 XJ650 Euro (model 14R) carbs. Original style aluminum shafts and plastic head cap. Each:
$ discontinued

HCP8420SET4 Aftermarket Hitachi Y-10 MAIN JET NEEDLES, set of 4:
$ discontinued



HCP15784 Aftermarket Hitachi Y-10 MAIN JET NEEDLE, correct for all USA market XJ650 (except Turbo) models, 1982-84 XJ650 Canadian bikes, and 1982 XJ650 Euro (model 14R) carbs. Brass needle with head cap. Each:
$ 21.95

HCP15784SET4 Aftermarket Hitachi Y-10 MAIN JET NEEDLES, set of 4:
$ 79.95



HCP17170 Aftermarket Hitachi Y-11 MAIN JET NEEDLE, correct for all 1980-81 XJ650 Euro (model 4K0 and 4K1) carbs. Brass needle with head cap. NOTE: Y-11 needles are a bit leaner than the Y-10 size needles (above) especially at wide-open throttle. The Y-11 needles are richer than the Y-13 size needles (below) except at wide-open-throttle positions, where they are a bit leaner. These differences can be used (via trial-and-error!) to facilitate further fine-tuning of your carbs, especially is "pod" air filter elements are used. Each:
$ 21.95

HCP17170SET4 Aftermarket Hitachi Y-11 MAIN JET NEEDLES, set of 4:
$ 79.95



HCP18211 Aftermarket Hitachi Y-12 MAIN JET NEEDLE, correct for all Canadian 1980-81 XJ650 Maxim and Midnight Maxim models, and Canadian 1982 XJ650RJC Seca (non-yics) models. Original style aluminum shafts and plastic head cap. Each:
$ discontinued

HCP18211SET4 Aftermarket Hitachi Y-12 MAIN JET NEEDLES, set of 4:
$ discontinued



HCP17588 Aftermarket Hitachi Y-13 MAIN JET NEEDLE, correct for all USA market XJ750 (1981-83) models. Original style aluminum shafts and plastic head cap. Each:
$ 21.95

HCP17588SET4 Aftermarket Hitachi Y-13 MAIN JET NEEDLES, set of 4:
$ 79.95



HCP17600 Aftermarket Hitachi Y-14 MAIN JET NEEDLE, correct for all non-USA market air-cooled XJ750 models (1981-84, except XJ750RL), and XJ750 Police (24L and 37H) models with Hitachi carbs. Original style aluminum shafts and plastic head cap. Each:
$ 21.95

HCP17600SET4 Aftermarket Hitachi Y-14 MAIN JET NEEDLES, set of 4:
$ 79.95



HCP17589 Aftermarket Hitachi Y-20 MAIN JET NEEDLE, correct for all XJ700 (1985-86) air-cooled models with Hitachi carbs. Original style aluminum shafts and plastic head cap. Each:
$ 21.95

HCP17589SET4 Aftermarket Hitachi Y-20 MAIN JET NEEDLES, set of 4:
$ 79.95



HCP20965 Aftermarket Hitachi MAIN JET NEEDLE, correct for all models with Hitachi carbs. This needle is richer than all other stock Hitachi needles except for the Y-19 version, and is a good candidate to use in modified (i.e. pods) engines to allow for the extra fuel flow required in higher air-flow situations. Original style aluminum shafts and plastic head cap. Each:
$ 21.95

HCP20965SET4 Aftermarket Hitachi MAIN JET NEEDLES, set of 4:
$ 79.95




HCP15786 Aftermarket Hitachi main jet NEEDLE TENSION SPRING, fits all XJ650 (except) Turbo, all 1981-84 XJ750 with air-cooled engines, and all XJ700 air-cooled models. Each:
$ 7.95

HCP15786SET4 Aftermarket Hitachi main jet NEEDLE TENSION SPRINGS, set of 4:
$ 29.95



mjw1) Aftermarket Hitachi main fuel jet needle TUNING WASHERS, these precision ground stainless steel shim washers (1010 carbon steel on the HCP14511 size) are used to raise the main jet needle height slightly, in order to allow ultra-fine performance tuning modifications. Tuning washers fit under the plastic needle cap rest on the bottom of the needle bore hole in the vacuum piston. Washers are available in a variety of thickness, can be stacked, and multiple washers can be used to provide the proper tuning desired. Fits all HSC32 and HSC33 series Hitachi carbs.


HCP14512SET4 Aftermarket 18-8 stainless steel TUNING WASHER, .025mm (.001") thick, sold in sets of 4 washers only:
$ 5.95

HCP14513SET8 Aftermarket 18-8 stainless steel TUNING WASHER, .050mm (.002") thick, sold in sets of 8 washers only:
$ 9.95

HCP14514SET8 Aftermarket 18-8 stainless steel TUNING WASHER, .075mm (.003") thick, sold in sets of 8 washers only:
$ 9.95

HCP14511SET8 Aftermarket 18-8 stainless steel TUNING WASHER, .100mm (.004") thick, sold in sets of 8 washers only:
$ 9.95




HITACHI MAIN NEEDLE JET a/k/a EMULSION TUBE:

Called by a variety of names, the main fuel jet tube is technically known as the MAIN NEEDLE JET, although they also go by the name of "power valves", "emulsion tubes", or some choice four-letter words while you are trying to remove them from their bore hole in the carb body! These 2" long brass tubes have a series of very precise, very small holes that actually atomize the fuel from the main fuel jet around the jet needle, and are what provide the final, precise metering of the fuel mixture through the main jet.



Commonly clogged and dirty-filthy beyond belief, they are easy to damage while removing them or during the cleaning process. If the holes are enlarged, if the end of the tube (where the needle enters it) worn or egg-shaped, or if the threads in the jet end damaged, these nozzles should be replaced, or your bike will never run properly.


HCP8418 Aftermarket Hitachi brass MAIN NEEDLE JET or EMULSION TUBE, fits all XJ650 (except Turbo) and 1981-84 XJ750 air-cooled models with the HSC32 or HSC33 series carbs, each:
$ 22.95

HCP8418SET4 Aftermarket Hitachi brass MAIN NEEDLE JETS or EMULSION TUBES, fits all XJ650 (except Turbo) and 1981-84 XJ750 air-cooled models with the HSC32 or HSC33 series carbs, set of 4:
$ 84.95



HCP17585 Aftermarket Hitachi brass MAIN NEEDLE JET or EMULSION TUBE, fits all XJ700 air-cooled models using the HSC33 series carbs, each:
$ 22.95

HCP17585SET4 Aftermarket Hitachi brass MAIN NEEDLE JETS or EMULSION TUBES, fits all XJ700 air-cooled models using the HSC33 series carbs, set of 4:
$ 84.95



HITACHI FUEL INLET "FLOAT" VALVES:

Original and aftermarket FUEL INLET "FLOAT" VALVE UNITS and KITS are a critical item to replace when performing a carb rebuild. Worn or damaged float valve seats or needles will cause bowl overflow and carb "flooding", making it impossible to set the fuel levels and float heights correctly, and leading to dangerous and damaging fuel overflow issues.

NOTE on fuel inlet/float valve seats, filter screens, and needles:

- original fuel inlet - float valve brass seats had a fuel inlet boss (where the inlet filter screen sits) of either 5.10mm (and thus uses the HCP9855 flat screen) or a 6.57mm boss with a 7.30mm "capture lip" (and this style float valve seat uses the HCP869 domed screen).

- The HCP10 (OEM) kit comes with a screen. The screen boss on the seat is 5.10mm OD and it comes with the HCP9855 flat screen. The needle is the same length as, and is rubber-tipped, just like the original. The float valve seat washer is made of copper as original.

- The HCP18795 kits (aftermarket) comes without a screen. The screen boss on the seat is 5.10mm OD and it accepts the HCP9855 flat screen. The needle is the same length as the OEM needle and is rubber-tipped just like the original. The float valve seat washer is made of aluminum rather than copper.

- The HCP17176 kits comes without a screen. The screen boss on the seat is 6.57mm OD and it accepts the HCP869 domed screen. The needle is slightly longer than the OEM needle and is metal-tipped (rather than rubber-tipped like the original needle). The float valve seat washer is made of aluminum rather than copper. These metal-tipped needles are a desirable option for people who live in an area where there is a significant amount of E-85 (alcohol) fuel blended with the gasoline. Ethanol tends to soften and attack rubber products, including the rubber tip of the original style float needles, which can then cause the float valve unit to stick (closed) or leak fuel even when in the closed position.

- The HCP1 lower end kits contain the HCP18795 float valves (above) and thus come without a screen. The screen boss on the seat is 5.10mm OD and it accepts the HCP9855 flat screen. The needle is the same length as the OEM needle and is rubber-tipped just like the original. The float valve seat washer is made of copper as original.

- The HCP18210 lower end kits also contains the HCP18795 float valves (above) but they come with a screen. The screen boss on the seat is 5.10mm OD and it includes the HCP9855 flat screen. The needle is the same length as the OEM needle and is rubber-tipped just like the original. The float valve seat washer is made of copper as original.


NOTE: all of the float needles that have a rubber tip also use a retaining clip to secure the needle to the float arm. Please note that the clip can be installed in two different ways (orientations). User experience indicates that the clip should be positioned so that the "open" area of the clip (that part of the clip that snaps over the ridge on the top of the needle) should be oriented towards the "back" of the carbs; in other words, the open area of the clip should be towards the airbox.

By the way, the purpose of this clip is to prevent the rubber tip of the needle from "seizing" within the float valve seat (due to the rubber swelling), or fuel varnish forming around it (and "gluing" it to the brass seat). Since the clip is attached to the float, as the fuel bowl empties the weight of the float pulling down on the needle will tend to overcome any needle tip seizure and prevent that float valve from remaining closed, even as the float bowl empties of fuel.

Metal-tipped needles, although not original on Hitachi carbs, were used on many original Mikuni carbs. The metal needle tips are much less prone to tip seizure and thus metal-tipped needles do not need, nor use (or even accept) the needle retaining clip.


NOTE: on all of the float needles that use a central, spring-loaded "plunger" at the float end, please note that this plunger is designed to act as a "shock absorber" and is not normally depressed in normal operation, and the float heights and fuel levels should not be set with this plunger depressed. Doing so will result in a vastly incorrect fuel level setting and will lead to carb flooding.


QUESTION: does it matter which style fuel inlet - float valve seat/needle/etc. is used in your carbs?

ANSWER: Not really, although it's probably best (but not absolutely necessary) to make sure that all 4 carbs use the same style set-up. The installation of any replacement fuel inlet - float valve seats and needles will require checking and re-adjustment of the fuel level and float heights after installation. You should ALWAYS check and adjust your float levels anytime you go into your carbs----and periodically even if you don't! I know, it's a pain-in-the-tail light to adjust the float levels----but correct float levels really will insure that your bike performs at its best and will also prevent problems with carb flooding.


HELPFUL HINT: in many cases, a float valve brass seat may get small scars, burrs, or other deformities in the area where the rubber needle tip contacts the seat opening, and thus preventing the fuel flow from being completely shut off even when the bowl is full. Such minor flaws can sometimes be polished out with some very fine (600-grit or higher) polishing paper rolled up into a very tight "cigarette" and then moved back-and-forth thru the opening. Likewise, any flaws on the internal bore of the seat......where the needle slides.....can sometimes be polished away. You should inspect the seat and needle very carefully, under good light and with strong magnification, in order to inspect these crucial parts during any rebuild process, or if carb flooding is indicated.


And if the threaded seat in the carb body where the float valve seat screws into the carb body has been injured, or if you want to restore the threads to their like-new condition, this thread chaser tap is what you'll need:

HCP2400 Aftermarket THREAD CHASER AND CLEAN-UP TAP, made from a high-speed titanium nitride coated steel. For the following holes: Hitachi float valve brass seat hole, and Mikuni starter / enrichment circuit (“choke”) brass plunger seat hole on all XJ550, FJ600, FZ600, YX600, XJ600, XJ650 Turbo, XJ700-X, and XJ750-X carbs.
$ 14.95

HCP28170 Aftermarket thread tap or EZ-out extractor TAP HANDLE, featuring offset tap handles and fully adjustable head for all m3-m12 size taps and size 0 to ½” extractors. This is the proper way to hold a tap or extractor to insure that the force is directed straight down and doesn’t “wobble” as you are cutting, reaming, or extracting. Much better than using pliers or vise-grips to hold the tool……..
$ 17.95



For all XJ650 (except Turbo), all XJ750 air-cooled models, all XJ700 air-cooled models:

HCP10 OEM Hitachi FUEL INLET - FLOAT VALVE ASSEMBLY, contains the fuel inlet - float valve needle with retainer clip, the brass screw-in valve seat, the seat washer, and the valve seat filter screen, each:
$ 129.95



HCP18795 Aftermarket Hitachi FUEL INLET - FLOAT VALVE ASSEMBLY, contains the fuel inlet - float valve needle with its retainer clip, the brass screw-in valve seat, and the seat washer. NOTE: this set contains an oem style clipped rubber-tipped needle. The HCP9855 flat float valve screen is not included and should be ordered separate. Each.
$ 24.95

HCP18795SET4 Aftermarket Hitachi FUEL INLET - FLOAT VALVE ASSEMBLIES, set of 4:
$ 89.95



HCP17176 Aftermarket Hitachi FUEL INLET - FLOAT VALVE ASSEMBLY, contains the fuel inlet - float valve needle, the brass screw-in valve seat, and the seat washer. NOTE: this set contains a non-clipped, metal-tipped needle (rather than the original rubber-tipped needle). The HCP869 domed float valve screen is not included and should be ordered separate. NOTE: these metal-tipped needles are a desirable option for people who live in an area where there is a significant amount of E-85 (alcohol) fuel blended with the gasoline. Ethanol tends to soften and attack rubber products, including the rubber tip of the original style float needles, which can then cause the float valve unit to stick (closed) or leak fuel even when in the closed position.
$ 24.95

HCP17176SET4 Aftermarket Hitachi FUEL INLET - FLOAT VALVE ASSEMBLIES, set of 4:
$ 89.95



fnv8) OEM Hitachi fuel inlet - float valve needle SEAT WASHER. This special "stepped" copper washer is needed to properly seal and space the float valve seat off of the carb body.

HCP6 OEM Hitachi fuel inlet - float valve SEAT WASHER, each:
$ discontinued

HCP6SET4 OEM Hitachi fuel inlet - float valve SEAT WASHERS, set of 4:
$ discontinued



fnv2) Aftermarket Hitachi fuel inlet - float valve needle seat FILTER SCREEN. These small mesh screen filters snap onto the top of the float needle valve seat and help to keep crud, junk, and other kinds of cosmic debris out of the carbs. These filter screens are included in some of the replacement float needle valve assemblies and lower end rebuild kits listed above; but, if you want to re-use your original valve seats, we still recommend the replacement of these screens. Fits all Hitachi HSC32/33/40-series carbs.

NOTE: screens are not interchangeable between different style seats, since the style and diameter of the screen seat boss is different between each type of seat. Make sure that you properly identify which style seat you have before ordering replacement filters.

HCP9855 Aftermarket Hitachi fuel inlet - float valve needle seat FLAT FILTER SCREEN, use one per carb, for use with float valve seats that have a 5.10mm screen boss (used on some original seats, on the HCP10 oem seats, and on the HCP18795 aftermarket float valve seats). This style screen pushes straight onto the brass seat screen boss. Each:
$ 7.95

HCP9855SET4 Aftermarket Hitachi fuel inlet - float valve needle seat FLAT FILTER SCREENS, use one per carb, set of 4:
$ 29.95



HCP2644 Aftermarket Hitachi fuel inlet - float valve needle seat FLAT FILTER SCREEN, use one per carb, for use with float valve seats that have a 4.53mm screen boss (used on some original float valve seats). This style screen pushes straight onto the brass seat screen boss. Each:
$ 7.95

HCP2644SET4 Aftermarket Hitachi fuel inlet - float valve needle seat FLAT FILTER SCREENS, use one per carb, set of 4:
$ 28.95



HCP869 Aftermarket Hitachi fuel inlet - float valve needle seat DOMED FILTER SCREEN, use one per carb, for use with float valve seats that have a a 6.57mm boss with a 7.30mm "capture lip" (used on some original float valve seats and on the HCP17176 aftermarket float valve seats). This style screen "snaps" onto the capture lip of the brass seat screen boss. Each:
$ 7.95

HCP869SET4 Aftermarket Hitachi fuel inlet - float valve needle seat DOMED FILTER SCREENS, use one per carb, set of 4:
$ 29.95




For all 1984-87 XV700 Virago, all 1981-83 and 1988 XV750 Virago, and all 1981-83 XV920 Virago models:

HCP872 Aftermarket Hitachi FUEL INLET - FLOAT VALVE ASSEMBLY, contains the fuel inlet - float valve needle with its retainer clip, the brass screw-in valve seat, and the seat washer. NOTE: this set contains an oem style clipped rubber-tipped needle. The HCP2644 flat float valve screen is included. Each.
$ 24.95

HCP872SET2 Aftermarket Hitachi FUEL INLET - FLOAT VALVE ASSEMBLIES, set of 2:
$ 44.95



HCP2644 Aftermarket Hitachi fuel inlet - float valve needle seat FLAT FILTER SCREEN, use one per carb, for use with float valve seats that have a 4.53mm screen boss (used on some original float valve seats). This style screen pushes straight onto the brass seat screen boss. Each:
$ 7.95

HCP2644SET2 Aftermarket Hitachi fuel inlet - float valve needle seat FLAT FILTER SCREENS, use one per carb, set of 2:
$ 14.95




HITACHI CARBS RUBBER PARTS KITS:

nn) Aftermarket Hitachi carbs RUBBER PARTS KITS contain all of the rubber parts needed when rebuilding a carb set: the throttle shaft seals, the fuel pipe o-rings, the choke plunger shaft dust seals, and the mixture screw o-rings and their washers (yes, we know the washers aren’t rubber, but you’ll probably need them, so they are included!). Note that the float needles / valve assemblies are not included. Can be used in conjunction with our lower-end rebuild kits listed below, but in most situations, you’ll be better off purchasing one of our complete carb rebuild kits (listed further below), but some people prefer to just do a “rubber refresh” periodically, and this kit gives you everything you’ll need to do an entire set of the Hitachi HSC32 or HSC33 series carbs.

HCP29063 Aftermarket Hitachi HSC32 and HSC33 series CARB RUBBER PARTS KITS.
$ 99.95



HITACHI CARBS LOWER END REBUILD KITS:

nn) Aftermarket Hitachi carbs LOWER END REBUILD KITS --- available in both a standard and deluxe version. Both kits contain the fuel inlet - float valve needle, float valve brass screw-in seat, the seat washer, idle mixture screw block-off cap, and an standard bowl gasket. The standard rebuild kits feature a float seat that can use, but does NOT include, the seat filter screen. The deluxe rebuild kits contain the filter screens, already installed on the seats, and an aftermarket hi-performance bowl gasket.

NOTE: the float valve needle that comes with these sets are approximately the same height as a factory Yamaha needle, and it may not be necessary to re-adjust the float level height after installation, but for safety and performance reasons you should always check the fuel level after any carb work or parts replacement!

These lower-end kits contain just the basic parts you'll need if doing a quick carb re-fresh or fighting leaking fuel inlet ("float") valves. All kits fit all XJ650 (except Turbo), all XJ700 air-cooled models, and all XJ750 air-cooled models.

For complete carb rebuild kits, see further below for our partial or complete carb rebuild kits.

NOTE: kits that contain the original style rubber-tipped needles include the needle hanger clip. By the way, the purpose of this clip is to prevent the rubber tip of the needle from "seizing" within the float valve seat (due to the rubber swelling), or fuel varnish forming around it (and "gluing" it to the brass seat). Since the clip is attached to the float, as the fuel bowl empties the weight of the float pulling down on the needle will tend to overcome any needle tip seizure and prevent that float valve from remaining closed, even as the float bowl empties of fuel.

Metal-tipped needles, although not original on Hitachi carbs, were used on many original Mikuni carbs. The metal needle tips are much less prone to tip seizure and thus metal-tipped needles do not need, nor use (or even accept) the needle retaining clip.


NOTE: neither the lower end nor the complete rebuild kits include the mixture screw block-off plug, and you should consider ordering those when doing your carb service:

ims3) Aftermarket idle mixture screw bore hole TAMPER CAPS replaces the original metal cap. These rubber plugs makes installation and removal much easier, and are highly recommended as a replacement for the original style metal cap (which,once installed, have to be drilled thru to be removed).

The HCP14731 plugs are a bit longer and may (probably will) require trimming of the base of the plug to fit properly/tightly, whereas the HCP7376 plugs have a much shorter ‘shaft” (below the head) and fit better (but both versions should use a small dab of adhesive to insure that they don’t vibrate loose out of the hole, as neither one is an exact-fit).


HCP14731 Aftermarket Hitachi idle mixture screw bore hole RUBBER PLUG, tapered design with mushroom head allows repeated removal and re-use. NOTE: may be a slightly loose fit on some models; if so, use a small amount of gasket or rubber adhesive to secure firmly in place (just a thin smear will do). Bottom part of shaft may need to be trimmed short for a perfect fit. Waterproof and dustproof design keeps the screw away from dirt and moisture, while also allowing for easy removal for tuning purposes. Fits all Hitachi HSC32 and HSC33 model carbs as used on all XJ650 (except Turbo), XJ700 non-X, and all XJ750 air-cooled models. Each:
$ 4.95

HCP14731SET4 Aftermarket Hitachi idle mixture screw bore hole RUBBER PLUGS, set of 4:
$ 17.95


HCP7376 Aftermarket Hitachi idle mixture screw bore hole RUBBER PLUG, tapered design with mushroom head allows repeated removal and re-use. NOTE: may be a slightly loose fit on some models; if so, use a small amount of gasket or rubber adhesive to secure firmly in place (just a thin smear will do). Waterproof and dustproof design keeps the screw away from dirt and moisture, while also allowing for easy removal for tuning purposes. A much better solution compared to the original metal anti-damper plugs! Fits all Hitachi HSC32 and HSC33 model carbs as used on all XJ650 (except Turbo), XJ700 non-X, and all XJ750 air-cooled models. Each:
$ 5.95

HCP7376SET4 Aftermarket Hitachi idle mixture screw bore hole RUBBER PLUGS, set of 4:
$ 22.95



HSC32 and HSC33 series carbs:

All of the following models use HSC32 carbs:
XJ650 Maxim, Midnight Maxim, XJ650RJ Seca (non-turbo), XJ650 Euro
XJ750 all USA 1981-83 models
XJ750 all Canadian 1981-83 models
XJ750 UK/Europe 11M models, XJ750-P Police models 24L and 37H versions

All of the following models use HSC33 series carbs:
1983 XJ750E-II model
1984 XJ750RL models
1984 XJ750 Euro 41Y models
1985-86 XJ700 air-cooled models.

The following kits contain the original style rubber-tipped float valve needles:

HCP1 Aftermarket Hitachi HSC32 and HSC33 series carbs LOWER END STANDARD REBUILD KIT, with rubber-tipped needle, needle clip, brass seat, and a standard bowl gasket; does not include the valve seat filter screen. Single kit does one carb. Each:
$ 27.95

HCP1SET4 Aftermarket Hitachi carb LOWER END STANDARD REBUILD KITS, set of 4:
$ 99.95


HCP18210 Aftermarket Hitachi carb LOWER END DELUXE REBUILD KIT, with rubber-tipped needle, needle clip, brass seat, seat filter screen, and a performance bowl gasket. Single kit does one carb. Each:
$ 32.95

HCP18210SET4 Aftermarket Hitachi carb LOWER END DELUXE REBUILD KITS, set of 4:
$ 119.95



All of the following kits contain aftermarket style metal-tipped float valve needles, recommended for people who live in an area where there is a significant amount of E-85 (alcohol) fuel blended with the gasoline. Ethanol tends to soften and attack rubber products, including the rubber tip of the original style float needles, which can then cause the float valve unit to stick (closed) or leak fuel even when in the closed position.

HCP18896 Aftermarket Hitachi carb LOWER END STANDARD REBUILD KIT, with metal-tipped needle, brass seat, and standard bowl gasket; does not include the valve seat filter screen. Single kit does one carb. Each:
$ 27.95

HCP18896SET4 Aftermarket Hitachi carb LOWER END STANDARD REBUILD KITS, set of 4:
$ 99.95


HCP18897 Aftermarket Hitachi carb LOWER END DELUXE REBUILD KIT, with metal-tipped needle, brass seat, seat filter screen, and a performance bowl gasket. Single kit does one carb. Each:
$ 32.95

HCP18897SET4 Aftermarket Hitachi carb LOWER END DELUXE REBUILD KITS, set of 4:
$ 119.95




HITACHI CARBS COMPLETE REBUILD KITS:

Aftermarket Hitachi HSC-xx series carb REBUILD KITS--- available in a variety of versions, depending on how far you plan to go into your carbs.

Our partial rebuild kits contains the basic parts you'll need to do a carb re-fresh when you are not breaking the individual carbs off the rack....float valve seats, needles, and washers, as well as the mixture screw o-rings, washers, and springs, a bowl gasket and bowl drain screw.

The complete rebuild kits have all of those items along with all of the additional parts you'll typically need when doing a full rack teardown......throttle shaft seals, shims, clips, and screws, as well as the fuel supply tube o-rings.

The standard kits contain a die-cut paper bowl gasket and a brass straight-blade bowl drain screw, while the deluxe kits have the upgraded hi-performance bowl gaskets and allen-drive bowl drain screws.

Note that both style kits contain only the typical "wear items" (gaskets, rubber parts, etc.) and do not include any of the various "hard parts" that you may also discover you'll need (jets, emulsion tubes, needles, choke plungers, attaching screws or hardware, etc.) that you may need or desire once you dig into your specific set of carbs.

NOTE: the needle that comes with all of these sets are approximately the same height as a factory Yamaha needle, and it may not be necessary to re-adjust the float level height after installation, but for safety and performance reasons you should always check the fuel level after any carb work or parts replacement!


NOTE: kits that contain the original style rubber-tipped needles include the needle hanger clip. By the way, the purpose of this clip is to prevent the rubber tip of the needle from "seizing" within the float valve seat (due to the rubber swelling), or fuel varnish forming around it (and "gluing" it to the brass seat). Since the clip is attached to the float, as the fuel bowl empties the weight of the float pulling down on the needle will tend to overcome any needle tip seizure and prevent that float valve from remaining closed, even as the float bowl empties of fuel.

Metal-tipped needles, although not original on Hitachi carbs, were used on many original Mikuni carbs. The metal needle tips are much less prone to tip seizure and thus metal-tipped needles do not need, nor use (or even accept) the needle retaining clip.



NOTE: neither the lower end nor the complete rebuild kits include the mixture screw block-off plug, and you should consider ordering those when doing your carb service:

ims3) Aftermarket idle mixture screw bore hole TAMPER CAPS replaces the original metal cap. These rubber plugs makes installation and removal much easier, and are highly recommended as a replacement for the original style metal cap (which,once installed, have to be drilled thru to be removed).

The HCP14731 plugs are a bit longer and may (probably will) require trimming of the base of the plug to fit properly/tightly, whereas the HCP7376 plugs have a much shorter ‘shaft” (below the head) and fit better (but both versions should use a small dab of adhesive to insure that they don’t vibrate loose out of the hole, as neither one is an exact-fit).


HCP14731 Aftermarket Hitachi idle mixture screw bore hole RUBBER PLUG, tapered design with mushroom head allows repeated removal and re-use. NOTE: may be a slightly loose fit on some models; if so, use a small amount of gasket or rubber adhesive to secure firmly in place (just a thin smear will do). Bottom part of shaft may need to be trimmed short for a perfect fit. Waterproof and dustproof design keeps the screw away from dirt and moisture, while also allowing for easy removal for tuning purposes. Fits all Hitachi HSC32 and HSC33 model carbs as used on all XJ650 (except Turbo), XJ700 non-X, and all XJ750 air-cooled models. Each:
$ 4.95

HCP14731SET4 Aftermarket Hitachi idle mixture screw bore hole RUBBER PLUGS, set of 4:
$ 17.95


HCP7376 Aftermarket Hitachi idle mixture screw bore hole RUBBER PLUG, tapered design with mushroom head allows repeated removal and re-use. NOTE: may be a slightly loose fit on some models; if so, use a small amount of gasket or rubber adhesive to secure firmly in place (just a thin smear will do). Waterproof and dustproof design keeps the screw away from dirt and moisture, while also allowing for easy removal for tuning purposes. A much better solution compared to the original metal anti-damper plugs! Fits all Hitachi HSC32 and HSC33 model carbs as used on all XJ650 (except Turbo), XJ700 non-X, and all XJ750 air-cooled models. Each:
$ 5.95

HCP7376SET4 Aftermarket Hitachi idle mixture screw bore hole RUBBER PLUGS, set of 4:
$ 22.95



Carb Rebuild Chemicals Kit:

Upgrade your carb rebuild kit order with our CARB REBUILD CHEMICALS KIT which contains the extra “tools” you’ll need to do a more complete and professional job. Each kit contains the following items….and yes, we know that the screwdriver bits aren’t really “chemicals”, but you’ll need them, too!

- a packet of our HCP28407 silicone grease…contains enough grease to do the throttle shaft seals, the choke plunger caps, the fuel supply tube o-rings, and --- if you’re not wasteful --- a thin smear for the bowl gaskets or bowl o-rings.

- a packet of the HCP29921 aluminum anti-seize paste…..for use on all fasteners (and bowl drain screws!) besides the carb rack screws or butterfly valve screws, which should use a thread-locking fluid instead:

- a tube of the HCP24844 low-strength thread-locker fluid, used on the carb rack screws and the butterfly valve screws.

- a bottle of the HCP8540 rubber RnR fluid,to be used on the vacuum piston diaphrams to keep them soft and flexible.

- a set of the HCP28226 complete JIS screwdriver bits set, which contains a complete set of short and long bits: one each of the #0, #1, #2, and #3 short (1”) bits, and one each of the #2 and #3 size long (3”) bits. These bits fit into a standard 1/4” bit holder.

HCP29920 Aftermarket CARB REBUILD CHEMICALS KIT, for use on all Hitachi and Mikuni carbs.
$ 39.95



HSC32 and HSC33 series carbs:

All of the following models use HSC32 carbs:
XJ650 Maxim, Midnight Maxim, XJ650RJ Seca (non-turbo), XJ650 Euro
XJ750 all USA 1981-83 models
XJ750 all Canadian 1981-83 models
XJ750 UK/Europe 11M models, XJ750-P Police models 24L and 37H versions

All of the following models use HSC33 series carbs:
1983 XJ750E-II model
1984 XJ750RL models
1985-86 XJ700 air-cooled models.


All of the following kits contain the original style rubber-tipped float valve needles:

Each set of our HCP18720 Hitachi standard partial rebuild kits listed below include:

- HCP18795 float valve sets (4)
- HCP862 standard bowl gasket (4)
- HCP895 mixture screw o-rings (4)
- HCP896 mixture screw washers (4)
- HCP6573 mixture screw springs (4)
- HCP11141 choke plunger valve rubber dust caps (4)
- HCP15785 fuel bowl brass straight-slot drain screws (4)

HCP18720 Aftermarket Hitachi HSCxx-series carb STANDARD PARTIAL REBUILD KITS, for use on all XJ650 (except Turbo), 1985-86 XJ700 air-cooled models, and all 1981-84 XJ750 air-cooled models. Contains enough parts needed to do an entire rack of carbs:
$ 179.95



Each set of our HCP18862 Hitachi deluxe partial rebuild kits listed below include:

- all of the items in the HCP18720 standard partial rebuild kits but with the following upgraded parts:
* the HCP15785 brass bowl drain screws are replaced with the HCP8878 allen-drive bowl drain screws.
* the HCP862 standard bowl gaskets are replaced with the HCP18411 hi-performance bowl gaskets

HCP18862 Aftermarket Hitachi HSCxx-series carb DELUXE PARTIAL REBUILD KITS, for use on all XJ650 (except Turbo), 1985-86 XJ700 air-cooled models, and all 1981-84 XJ750 air-cooled models. Contains enough parts needed to do an entire rack of carbs:
$ 189.95




Each set of our HCP18721 Hitachi standard complete rebuild kits listed below include:

- HCP18795 float valve sets (4)
- HCP9855 float valve screens installed onto the valve seats (4)
- HCP862 standard bowl gasket (4)
- HCP895 mixture screw o-rings (4)
- HCP896 mixture screw washers (4)
- HCP6573 mixture screw springs (4)
- HCP11141 choke plunger valve rubber dust caps (4)
- HCP15785 fuel bowl brass straight-slot drain screws (4)
- HCP38B throttle shaft seals (8)
- HCP3991 throttle shaft shim washers (8)
- HCP1348 throttle shaft butterfly valve screws (8)
- HCP905 throttle shaft e-clips (2)
- HCP2421 fuel supply tube o-rings (10)

HCP18721 Aftermarket Hitachi HSCxx-series carb STANDARD COMPLETE REBUILD KITS, for use on all XJ650 (except Turbo), 1985-86 XJ700 air-cooled models, and all 1981-84 XJ750 air-cooled models. NOTE: these kits contain ten (10) of the fuel supply/overflow tube o-rings, which is enough to accommodate the HSC33 series carbs; owners of the HSC32 series carbs will find that they have 4 extra o-rings leftover, as those carbs only require 6 of those o-rings for the fuel supply tubes. Also included are eight (8) of the throttle shaft plastic shim washers, which will leave you with one extra shim (HSC32 carbs) or three extra shims (HSC33 carbs). Contains all the parts needed to do an entire rack of carbs:
$ 269.95



Each set of our HCP18863 Hitachi deluxe complete rebuild kits listed below include:

- all of the items in the HCP18721 standard complete rebuild kits but with the following upgraded parts:
* the HCP15785 brass bowl drain screws are replaced with the HCP8878 allen-drive bowl drain screws.
* the HCP862 standard bowl gaskets are replaced with the HCP18411 hi-performance bowl gaskets

HCP18863 Aftermarket Hitachi HSCxx-series carb DELUXE COMPLETE REBUILD KITS, for use on all XJ650 (except Turbo), 1985-86 XJ700 air-cooled models, and all 1981-84 XJ750 air-cooled models. NOTE: these kits contain ten (10) of the fuel supply/overflow tube o-rings, which is enough to accommodate the HSC33 series carbs; owners of the HSC32 series carbs will find that they have 4 extra o-rings leftover, as those carbs only require 6 of those o-rings for the fuel supply tubes. Also included are eight (8) of the throttle shaft plastic shim washers, which will leave you with one extra shim (HSC32 carbs) or three extra shims (HSC33 carbs). Contains all the parts needed to do an entire rack of carbs:
$ 279.95




All of the following kits contain aftermarket style metal-tipped float valve needles, recommended for people who live in an area where there is a significant amount of E-85 (alcohol) fuel blended with the gasoline. Ethanol tends to soften and attack rubber products, including the rubber tip of the original style float needles, which can then cause the float valve unit to stick (closed) or leak fuel even when in the closed position.

Each set of our HCP18880 Hitachi standard partial rebuild kits listed below include:

- HCP17176 float valve sets (4)
- HCP862 standard bowl gaskets (4)
- HCP895 mixture screw o-rings (4)
- HCP896 mixture screw washers (4)
- HCP6573 mixture screw springs (4)
- HCP11141 choke plunger valve rubber dust caps (4)
- HCP15785 fuel bowl brass straight-slot drain screws (4)

HCP18880 Aftermarket Hitachi HSCxx-series carb STANDARD PARTIAL REBUILD KITS, for use on all XJ650 (except Turbo), 1985-86 XJ700 air-cooled models, and all 1981-84 XJ750 air-cooled models. Contains enough parts needed to do an entire rack of carbs:
$ 179.95



Each set of our HCP18881 Hitachi deluxe partial rebuild kits listed below include:

- all of the items in the HCP18880 standard partial rebuild kits but with the following upgraded parts:
* the HCP15785 brass bowl drain screws are replaced with the HCP8878 allen-drive bowl drain screws.
* the HCP862 standard bowl gaskets are replaced with the HCP18411 hi-performance bowl gaskets

HCP18881 Aftermarket Hitachi HSCxx-series carb DELUXE PARTIAL REBUILD KITS, for use on all XJ650 (except Turbo), 1985-86 XJ700 air-cooled models, and all 1981-84 XJ750 air-cooled models. Contains enough parts needed to do an entire rack of carbs:
$ 189.95




Each set of our HCP18882 Hitachi standard complete rebuild kits listed below include:

- HCP17176 float valve sets (4)
- HCP869 screens installed onto the valve seats (4)
- HCP862 standard bowl gasket (4)
- HCP895 mixture screw o-ring (4)
- HCP896 mixture screw washers (4)
- HCP6573 mixture screw spring (4)
- HCP11141 choke plunger valve rubber dust caps (4)
- HCP15785 fuel bowl brass straight-slot drain screw (4)
- HCP38B throttle shaft seals (8)
- HCP3991 throttle shaft shim washers (8)
- HCP1348 throttle shaft butterfly valve screws (8)
- HCP905 throttle shaft e-clips (2)
- HCP2421 fuel supply tube o-rings (10)

HCP18882 Aftermarket Hitachi HSCxx-series carb STANDARD COMPLETE REBUILD KITS, for use on all XJ650 (except Turbo), 1985-86 XJ700 air-cooled models, and all 1981-84 XJ750 air-cooled models. NOTE: these kits contain ten (10) of the fuel supply/overflow tube o-rings, which is enough to accommodate the HSC33 series carbs; owners of the HSC32 series carbs will find that they have 4 extra o-rings leftover, as those carbs only require 6 of those o-rings for the fuel supply tubes. Also included are eight (8) of the throttle shaft plastic shim washers, which will leave you with one extra shim (HSC32 carbs) or three extra shims (HSC33 carbs). Contains all the parts needed to do an entire rack of carbs:
$ 269.95



Each set of our HCP18883 Hitachi deluxe complete rebuild kits listed below include:

- all of the items in the HCP18882 standard complete rebuild kits but with the following upgraded parts:
* the HCP15785 brass bowl drain screws are replaced with the HCP8878 allen-drive bowl drain screws.
* the HCP862 standard bowl gaskets are replaced with the HCP18411 hi-performance bowl gaskets

HCP18883 Aftermarket Hitachi HSCxx-series carb DELUXE COMPLETE REBUILD KITS, for use on all XJ650 (except Turbo), 1985-86 XJ700 air-cooled models, and all 1981-84 XJ750 air-cooled models. NOTE: these kits contain ten (10) of the fuel supply/overflow tube o-rings, which is enough to accommodate the HSC33 series carbs; owners of the HSC32 series carbs will find that they have 4 extra o-rings leftover, as those carbs only require 6 of those o-rings for the fuel supply tubes. Also included are eight (8) of the throttle shaft plastic shim washers, which will leave you with one extra shim (HSC32 carbs) or three extra shims (HSC33 carbs). Contains all the parts needed to do an entire rack of carbs:
$ 279.95



HSC34 series carbs:
1980-81 XS850


Each set of our HCP26628 Hitachi standard partial rebuild kits listed below include:

1 - bowl gasket
1 - bowl drain screw copper crush washer (fits 1980 model bowls only)
1 - bowl drain brass screw (fits 1981 model bowls only)
1 - air valve gasket
1 - fuel inlet / float valve assembly with rubber-tipped needle, needle hanger clip, seat, screen, seat washer
1 - pilot mixture screw with o-ring, spring, and washer
1 - main jet needle and clip
1 each - #130 main fuel jet
1 each - #40 pilot fuel jet
1 each - #40 starter jet
1 each - #50, #142, and #155 air jets
2 - throttle shaft seals
2 - throttle shaft butterfly valve screws

HCP26628 Aftermarket Hitachi HSC34-series carb STANDARD PARTIAL REBUILD KIT, for use on all 1980-81 XS850 models. Contains enough parts needed to do one carb. Each:
$ 49.95

HCP26628SET3 Aftermarket Hitachi HSC34-series carb STANDARD PARTIAL REBUILD KITS, set of 3 kits:
$ 139.95



HSC40 series carbs:

All of the following models use HSC40 carbs:
1984-86 XV700 Virago
1981-83 XV750 Virago
1981-83 XV920 Virago
1984-85 XV1000 Virago
1986-87 XV1100 Virago

All of the following kits contain the original style rubber-tipped float valve needles:

Each set of our HCP26624 Hitachi standard partial rebuild kits listed below include:

1 - bowl gasket
4 - bowl screws and lockwashers
1 - standard brass bowl drain screw
1 - fuel inlet / float valve assembly with rubber-tipped needle, needle hanger clip, seat, screen, seat washer
1 - pilot mixture screw with o-ring, spring, washer, and port anti-tamper plug
1 each - main fuel jets # 124, #128, and #132
2 - throttle shaft seals
2 - throttle shaft butterfly valve screws
2 - choke plunger valve rubber dust seals

HCP26624 Aftermarket Hitachi HSC40-series carb STANDARD PARTIAL REBUILD KIT, for use on all 1984-85 XV700 Virago and 1984-85 XV1000 Virago models. Contains enough parts needed to do one carb. Note that main fuel jet size varies between different years and models: #124 is used on 1984-85 XV1000 models (on the #1 carb only), #128 is used on 1984-85 XV700 models (on the #1 carb), and #132 is used on 1984-85 XV700 models (on the #2 carb) and 1984-85 XV1000 models (on the #2 carb only). Each:
$ 54.95

HCP26624SET2 Aftermarket Hitachi HSC40-series carb STANDARD PARTIAL REBUILD KITS, set of 2 kits:
$ 99.95




Each set of our HCP29443 Hitachi standard partial rebuild kits listed below include:

1 - float bowl gasket
1 - fuel inlet / float valve assembly with rubber-tipped needle, needle hanger clip, threaded seat, and seat washer
1 - main jet needle
1 - main fuel jet #122
1 - pilot fuel jet #41
2 - throttle shaft seals
2 - throttle shaft plastic shim washers (note: these shim washers are slightly smaller in OD than originals but makes no difference. On the front carb, use 1 washer on both inner and outer sides of throttle shaft. On the rear carb, use 1 on outer end and 2 on inner end of throttle shaft.
2 - throttle shaft butterfly valve screws
2 - choke plunger valve rubber dust seals

HCP29443 Aftermarket Mikuni carb STANDARD PARTIAL REBUILD KIT, for use on all 1981-83 XV750 Virago models. Contains enough parts needed to do one carb. Each:
$ 47.95

HCP29443SET2 Aftermarket Hitachi HSC40-series carb STANDARD PARTIAL REBUILD KITS, set of 2 kits:
$ 89.95




Each set of our HCP26629 Hitachi standard partial rebuild kits listed below include:

1 - bowl gasket 1981-82 models
1 - bowl gasket 1983 models
1 - brass bowl drain screw
4 - bowl screws and lockwasher
1 - fuel inlet / float valve assembly with rubber-tipped needle, needle hanger clip, seat, screen, seat washer
1 - pilot mixture screw with o-ring, spring, washer, and port anti-tamper plug
1 each - main fuel jets #124, #126, and #128
1 - pilot fuel jet #41
2 - throttle shaft seals
2 - throttle shaft butterfly valve screws
2 - choke plunger valve rubber dust seals

HCP26629 Aftermarket Hitachi HSC40-series carb STANDARD PARTIAL REBUILD KIT, for use on all 1981-83 XV920 Virago models. Contains enough parts needed to do one carb. Note that main fuel jet size varies between different years and models: #124 is used on 1981-82 XV920 RH/RJ carbs, #126 on all XV920 models, and #128 on 1982-83 XV920 J/K/MK models 1981-82 models use the “V”-shaped bowl gasket, while 1983 models use the fully “square” gasket. Each:
$ 69.95

HCP26629SET2 Aftermarket Hitachi HSC40-series carb STANDARD PARTIAL REBUILD KITS, set of 2 kits:
$ 129.95




NOTE: good used carb bodies, float bowls, and other miscellaneous carb parts are sometimes available, please inquire. Please note that we have many more carb parts than what is listed above, if you want the whole list, or want to just buy some of the individual component pieces, please review the information at:

http://www.xjbikes.com/forums/index.php?threads/xj-parts-catalog-section-c-fuel-system.44642

 

kl7) Aftermarket Hitachi FLOATS, FLOAT PINS, AND SHIMS:

Unlike the Mikuni carbs, Hitachi carb FLOATS used a loose-fitting hinge PIN to secure the float to the cast float posts in the bottom of the carb body. Additionally, the formed "tube" that the float pin slides thru on the float bracket arm is somewhat "short" in overall length compared to the distance between the float posts, resulting in a float that typically has quite a bit of side-to-side "slop" in its motion and movement. This slop can allow quite a bit of erratic movement in the float on the pin, and can contribute to difficulties with getting the fuel level set properly and consistently on these carbs.

We offer some very precise SHIMMING WASHERS that allow you to take up this slack. Unfortunately, due to variations in the machining of the float post inside distance on various car bodies, there is no "one-size-fits-all" solution that we can offer as to what thickness shims are going to be correct to use. The best guidance that we can offer is that you want to eliminate equal amounts of slop on both sides of the float pin tube, while still allowing for enough clearance on both sides to eliminate any chance of the float binding on the pin.

Our research shows that a typical carb body will have float posts that have approximately an 18.10mm inside-to-inside distance, at the level where the pin goes thru the float posts. The pin tube on the float, however, is only about 17.05mm wide.......giving almost a total amount of "slop of 1.00mm between the pin tube and the float posts......note that this 1.00mm of slop is equally divided on both ends of the float pin tube, resulting in a clearance of approximately 0.50mm on each side of the pin tube.

Our thoughts and experience shows that you can safely reduce this clearance to 0.25mm per side.


HCP2 OEM Hitachi FLOAT & PIN SET, fits all XJ650 (except Turbo), XJ700 air-cooled, all 1981-84 XJ750 air-cooled engines, and 1983 XV750MK Virago models that use the Hitachi HSC40 series carbs. Each:
$ 49.95

HCP2SET4 OEM Hitachi FLOAT & PIN SETS, set of 4:
$ 149.95


HCP866 Aftermarket Hitachi FLOAT & PIN SET, fits all XJ650 (except Turbo), XJ700 air-cooled, all 1981-84 XJ750 air-cooled engines, and 1983 XV750MK Virago models that use the Hitachi HSC40 series carbs. Each:
$ 22.95

HCP866SET4 Aftermarket Hitachi FLOAT & PIN SETS, set of 4:
$ 79.95



HCP288 Aftermarket Hitachi FLOAT PIN, fits all XJ650 (except Turbo), XJ700 air-cooled, all 1981-84 XJ750 air-cooled engines, and the following Virago models: 1984-87 XV700, 1981-83 XV750, 1981-83 XV920, 1984-85 XV1000, and 1986-87 XV1100 carbs. Each:
$ 5.95

HCP288SET2 Aftermarket Hitachi FLOAT PINS, set of 2:
$ 10.95

HCP288SET4 Aftermarket Hitachi FLOAT PINS, set of 4:
$ 18.95




HCP18328 Aftermarket float pin tube SHIMMING WASHER, for use with all Hitachi original floats. Each stainless steel shim measures 0.0254mm thickness. Use as required or in conjunction with other size shimming washers to take up the proper amount of slop. Each:
$ 1.50

HCP18328SET8 Aftermarket float pin tube SHIMMING WASHER, set of 8:
$ 9.95


HCP18329 Aftermarket float pin tube SHIMMING WASHER, for use with all Hitachi original floats. Each stainless steel shim measures 0.0508mm thickness. Use as required or in conjunction with other size shimming washers to take up the proper amount of slop. Each:
$ 1.50

HCP18329SET8 Aftermarket float pin tube SHIMMING WASHER, set of 8:
$ 9.95


HCP18330 Aftermarket float pin tube SHIMMING WASHER, for use with all Hitachi original floats. Each stainless steel shim measures 0.0762mm thickness. Use as required or in conjunction with other size shimming washers to take up the proper amount of slop. Each:
$ 1.50

HCP18330SET8 Aftermarket float pin tube SHIMMING WASHER, set of 8:
$ 9.95


HCP18331 Aftermarket float pin tube SHIMMING WASHER, for use with all Hitachi original floats. Each stainless steel shim measures 0.1016mm thickness. Use as required or in conjunction with other size shimming washers to take up the proper amount of slop. Each:
$ 1.50

HCP18331SET8 Aftermarket float pin tube SHIMMING WASHER, set of 8:
$ 9.95


HCP18332 Aftermarket float pin tube SHIMMING WASHER, for use with all Hitachi original floats. Each stainless steel shim measures 0.1270mm thickness. Use as required or in conjunction with other size shimming washers to take up the proper amount of slop. Each:
$ 1.50

HCP18332SET8 Aftermarket float pin tube SHIMMING WASHER, set of 8:
$ 9.95


HCP18333 Aftermarket float pin tube SHIMMING WASHER, for use with all Hitachi original floats. Each stainless steel shim measures 0.1524mm thickness. Use as required or in conjunction with other size shimming washers to take up the proper amount of slop. Each:
$ 1.50

HCP18333SET8 Aftermarket float pin tube SHIMMING WASHER, set of 8:
$ 9.95



HCP18334 Aftermarket float pin tube SHIMMING WASHER, for use with all Hitachi original floats. Each stainless steel shim measures 0.1778mm thickness. Use as required or in conjunction with other size shimming washers to take up the proper amount of slop. Each:
$ 2.50

HCP18334SET8 Aftermarket float pin tube SHIMMING WASHER, set of 8:
$ 12.95



HCP18335 Aftermarket float pin tube SHIMMING WASHER, for use with all Hitachi original floats. Each stainless steel shim measures 0.2032mm thickness. Use as required or in conjunction with other size shimming washers to take up the proper amount of slop. Each:
$ 1.50

HCP18335SET8 Aftermarket float pin tube SHIMMING WASHER, set of 8:
$ 9.95



HCP18336 Aftermarket float pin tube SHIMMING WASHER, for use with all Hitachi original floats. Each stainless steel shim measures 0.2540mm thickness. Use as required or in conjunction with other size shimming washers to take up the proper amount of slop. Each:
$ 1.50

HCP18336SET8 Aftermarket float pin tube SHIMMING WASHER, set of 8:
$ 9.95




FLOAT BOWL GASKETS:

OEM bowl gaskets are typically made from an asbestos or graphite-impregnated board material, while the standard-duty aftermarket gaskets are made from a treated fiber (cardboard) type material. We recommend the use of the aftermarket hi-performance gaskets which are made from an anti-stick material that is designed to slightly swell in the presence of petroleum products (fuel or oil), thus creating a super-tight, leak-proof flange seal. All versions of our die-cut replacement carb bowl-to-carb body gaskets correctly replace your torn or leaking originals. NOTE: replacement bowl gaskets are already included in the various lower end and complete carb rebuild kits listed above.

HCP50 OEM standard-duty, die-cut vegetable-fiber material carb FLOAT BOWL GASKET, fits all XJ650 (except Turbo), all XJ700 non-X, and all XJ750 models with the HSC32 or HSC33 series Hitachi carbs, each:
$ 17.95

HCP50SET4 OEM standard-duty carb FLOAT BOWL GASKETS, set of 4:
$ 69.95



HCP862 Aftermarket standard-duty, die-cut vegetable-fiber material carb FLOAT BOWL GASKET, fits all XJ650 (except Turbo), all XJ700 non-X, and all XJ750 models with the HSC32 or HSC33 series Hitachi carbs, each:
$ 8.95

HCP862SET4 Aftermarket standard-duty carb FLOAT BOWL GASKETS, set of 4:
$ 29.95



HCP18411 Aftermarket hi-performance material carb FLOAT BOWL GASKET, fits all XJ650 (except Turbo), all XJ700 non-X, and all XJ750 models with the HSC32 or HSC33 series Hitachi carbs, each:
$ 10.95

HCP18411SET4 Aftermarket hi-performance material carb FLOAT BOWL GASKETS, set of 4:
$ 39.95



HCP11618 Aftermarket standard-duty, die-cut vegetable-fiber material carb FLOAT BOWL GASKET, fits all 1984-86 XV700, all 1983 XV920, 1984-85 XV1000, and 1986-87 XV1100 Virago models with Hitachi HSC40-series carbs, each:
$ 8.95

HCP11618SET2 Aftermarket standard-duty carb FLOAT BOWL GASKETS, set of 2:
$ 14.95


HCP29410 Aftermarket hi-performance, die-cut anti-stick material carb FLOAT BOWL GASKET, fits all 1984-86 XV700, all 1983 XV920, 1984-85 XV1000, and 1986-87 XV1100 Virago models with Hitachi HSC40-series carbs, each:
$ 9.95

HCP29410SET2 Aftermarket standard-duty carb FLOAT BOWL GASKETS, set of 2:
$ 17.95



HCP11978 Aftermarket standard-duty, die-cut vegetable-fiber material carb FLOAT BOWL GASKET, fits all 1981-83 XV750 and all 1981-82 XV920 Virago models with Hitachi HSC40-series carbs, each:
$ 8.95

HCP11978SET2 Aftermarket standard-duty carb FLOAT BOWL GASKETS, set of 2:
$ 14.95


HCP29411 Aftermarket hi-performance material carb FLOAT BOWL GASKET, fits all 1981-83 XV750 and all 1981-82 XV920 Virago models with Hitachi HSC40-series carbs, each:
$ 9.95

HCP29411SET2 Aftermarket hi-performance material carbb FLOAT BOWL GASKETS, set of 2:
$ 17.95




NOTE: if you use any type of sealant on these gaskets, use it on the BOWL side of the gasket (something like Permatex Copper Spray-A-Gasket is a fine choice). On the carb body side of the gasket, use a light oil....like Marvel Mystery Oil or the like....and barely moisten the gasket surface. This will allow the new gasket to soften slightly and allows the gasket to form itself to the raised mounting ridge that is cast onto the carb body mating flange.....and also allows for an easy, no-stick removal of the float bowl in the future!




HITACHI CARB FLOAT BOWL HARDWARE:

fff) OEM Hitachi carb BOWL-TO-BODY MOUNTING SCREW, stock. Does not come with the lock washer, which has to be ordered below separately. NOTE: original screws had integral captured lock washers, the replacement ones do not. These replacement panhead, phillips-drive screws have a black-oxide finish, as opposed to the bright, zinc-plated finish used originally. Use with the HCP59 lock washers listed below.

HCP2940 OEM Hitachi carb bowl-to-body MOUNTING SCREW, panhead, phillips-drive, black oxide finish, each:
$ 4.95

HCP2940SET4 OEM Hitachi carb bowl-to-body MOUNTING SCREWS, set of 4:
$ 18.95

HCP2940SET16 OEM Hitachi carb bowl-to-body MOUNTING SCREWS, set of 16:
$ 72.95



m5) Aftermarket Hitachi carb BOWL-TO-BODY MOUNTING SCREW, stock style. Does not come with the lock washer, which has to be ordered below separately. NOTE: original screws had integral captured lock washers, the replacement ones do not.

Replacement screws come in a variety of different finish and head drive styles, so please review the descriptions below carefully!

Here are some quick guides that shows the different head and drive styles:



https://www.boltdepot.com/fastener-information/Printable-Tools/Type-Chart.pdf

http://www.oocities.org/dtmcbride/home_garden/fasteners.html



These replacement panhead, phillips-drive screws have a bright, zinc-plated finish as used originally. Use with the HCP913 lock washers listed further below:

HCP2643 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREW, panhead, phillips-drive, bright, zinc-plated finish, each:
$ 1.50

HCP2643SET4 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 4:
$ 5.25

HCP2643SET16 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 16:
$ 14.95



These replacement panhead, phillips-drive screws have a polished finish and are made from 18-8 stainless steel. Use with the HCP57 lock washers listed further below:

HCP302 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREW, 18-8 stainless steel, panhead, phillips-drive, each:
$ 1.50

HCP302SET4 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 4:
$ 4.95

HCP302SET16 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 16:
$ 12.95



These replacement button-head, hex-key drive screws have a polished finish, and are made from a 18-8 polished stainless steel. Use with the HCP57 lock washers listed further below:

HCP303 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREW, button-head, hex-drive, 18-8 stainless steel, each:
$ 1.95

HCP303SET4 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 4:
$ 5.95

HCP303SET16 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 16:
$ 14.95



These replacement socket head, hex-key drive screws have a polished finish, as and are made from a 18-8 polished stainless steel. Use with the HCP57 lock washers listed further below:

HCP56 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREW, socket head, hex-drive, 18-8 stainless steel, each:
$ 1.95

HCP56SET4 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 4:
$ 4.95

HCP56SET16 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 16:
$ 13.95



These replacement socket head, hex-key drive screws have a black-oxide finish, and are made from alloy steel material. Use with the HCP59 lock washers listed further below:

HCP58 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREW, socket head, hex-drive, black oxide coated alloy steel, each:
$ 1.50

HCP58SET4 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 4:
$ 4.95

HCP58SET16 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 16:
$ 9.95



These replacement panhead, phillips-drive screws have a golden chromate finish, as opposed to the bright, zinc-plated finish used originally, and come with the integral captured lockwasher as original:

HCP1358 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREW with lockwasher, panhead, phillips-drive, gold chromate finish, each:
$ 1.95

HCP1358SET4 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS with lockwasher, set of 4:
$ 6.95

HCP1358SET16 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS with lockwasher, set of 16:
$ 19.95




ggg) Replacement Hitachi carb Bowl-to-Body Mounting Screw LOCK WASHERS, available in a variety of finishes to match the above screws,

These replacement lock washers have a black-oxide finish. Use with the HCP2940 or the HCP58 screws listed above:

HCP59 Aftermarket Hitachi carb bowl-to-body black oxide LOCK WASHER, each:
$ 1.95

HCP59SET4 Aftermarket Hitachi carb bowl-to-body black oxide LOCK WASHERS, set of 4:
$ 7.50

HCP59SET16 Aftermarket Hitachi carb bowl-to-body black oxide LOCK WASHERS, set of 16:
$ 21.95



These replacement lock washers have a bright, zinc-plated finish as used originally. Use with the HCP2643 screws listed above:

HCP913 Aftermarket Hitachi carb bowl-to-body bright zinc-plated LOCK WASHER, each:
$ 1.75

HCP913SET4 Aftermarket Hitachi carb bowl-to-body bright zinc-plated LOCK WASHERS, set of 4:
$ 5.95

HCP913SET16 Aftermarket Hitachi carb bowl-to-body bright zinc-plated LOCK WASHERS, set of 16:
$ 17.95



These replacement lock washers are made from an 18-8 stainless steel material for durability. Use with the HCP56, HCP302, or HCP303 screws listed above:

HCP57 Aftermarket Hitachi carb bowl-to-body stainless LOCK WASHER, each:
$ 2.95

HCP57SET4 Aftermarket Hitachi carb bowl-to-body stainless LOCK WASHERS, set of 4:
$ 10.95

HCP57SET16 Aftermarket Hitachi carb bowl-to-body stainless LOCK WASHERS, set of 16:
$ 29.95




HITACHI CARB FLOAT BOWL DRAIN SCREW:

e5) OEM and aftermarket Hitachi carb BOWL DRAIN SCREW. Available in a variety of versions, these taper-point screws will exactly replace the mangled or damaged original screws. Use 1 per bowl on all Hitachi-equipped models: all XJ650 (except Turbo), all XJ700 air-cooled models, and all XJ750 air-cooled models. These drain screws will also fit all 1981 (only) XS850 models, 1984-87 Virago XV700, 1981-83 Virago XV750, 1981-83 Virago XV920, 1984-85 Virago XV1000, and 1986-87 XV1100 carbs.

And if the threaded port in the float bowl where the drain screw fits been injured, or if you want to restore the threads to their like-new condition, this thread chaser tap is what you'll need:

HCP2399 Aftermarket THREAD CHASER AND CLEAN-UP TAP, made from a high-speed titanium nitride coated steel. For the following threaded holes listed below, as well as many other areas of the bike. This 6 x 1.00 pitch is a very common sized thread.
$ 9.95

- Hitachi HSC32 air compensator jet holes.
- Hitachi lower carb rack mount screw holes.
- Hitachi pilot and main air jets port holes (in carb throat, below vacuum piston).
- Hitachi carb bowl drain screw hole.
- All models: gas tank mounting holes for the petcock.
- All models: gas tank fuel sending unit mounting holes.
- Mikuni XJ550, FJ/FZ/YX600, XJ600 Seca Ii, XJ650 Turbo, XJ700-X, XJ750-X, XJ900, XJ1100, and XS1100 lower carb rack bracket screw holes.
- All XJ550 - XJ900 models cylinder head exhaust port stud holes.
- All XJ550 - XJ1100 models cylinder head valvecover mounting bolt holes.
- All XJ550 - XJ1100 and XS1100 models cylinder head cam bearing cap bolt holes.
- All XJ550 - XJ1100 and XS1100 models cylinder head intake manifold bolt holes.
- All XJ550 - XJ1100 and XS1100 models cylinder head valvecover mounting bolt holes.
- All XJ550 - XJ1100 and XS1100 models engine side covers mounting bolt holes.
- All XJ550 - XJ1100 and XS1100 models engine oil pan mounting bolt holes.
- All XJ550 - XJ1100 and XS1100 models engine upper-to-lower crankcase cinch bolt holes (note: some of the mounting holes are different size, and require the use of the larger HCP11028 tap below).
- XJ700-X and XJ750-X cylinder heads and jugs coolant jacket bolt holes.
- Some models: cylinder head cam chain tunnel-to-cylinder jugs cinching studs, for engines that have 2 studs on both the front and rear of the tunnel (models with a single tunnel stud use the HCP11028 tap listed further below).
- Most models: upper crankcase to cylinder jugs stud.
- All models: cam chain tensioner mounting bolt holes.
- Some models: mechanical tachometer drive housing mounting hole.
- exhaust headpipe gas test bolt threaded hole in the bottom of each header pipe.
- exhaust collector input (from header pipe) pinch clamp.
- collector chrome cover retaining bolt hole (XJ1100 models)
- collector chrome cover rear retaining screw hole (XJ1100 models).
- XJ650 Turbo models, turbo housing hole for the right muffler “joiner pipe” mounting bolt holes.


HCP28170 Aftermarket thread tap or EZ-out extractor TAP HANDLE, featuring offset tap handles and fully adjustable head for all m3-m12 size taps and size 0 to ½” extractors. This is the proper way to hold a tap or extractor to insure that the force is directed straight down and doesn’t “wobble” as you are cutting, reaming, or extracting. Much better than using pliers or vise-grips to hold the tool……..
$ 17.95


NOTE: it is recommended that anti-seize compound be used on the screw threads when fitting screws back into the carb bowl passage.


HCP864 OEM Hitachi carb BOWL DRAIN SCREW, panhead, phillips-drive, cad-plated alloy-steel each:
$ 21.95

HCP864SET2 OEM Hitachi carb BOWL DRAIN SCREWS, set of 2:
$ 42.95

HCP864SET3 OEM Hitachi carb BOWL DRAIN SCREWS, set of 3:
$ 61.95

HCP864SET4 OEM Hitachi carb BOWL DRAIN SCREWS, set of 4:
$ 79.95



HCP15785 Aftermarket Hitachi carb BOWL DRAIN SCREW, cheesehead, straight-slot, brass, each:
$ 10.95

HCP15785SET2 Aftermarket Hitachi carb BOWL DRAIN SCREWS, set of 2:
$ 18.95

HCP15785SET3 Aftermarket Hitachi carb BOWL DRAIN SCREWS, set of 3:
$ 24.95

HCP15785SET4 Aftermarket Hitachi carb BOWL DRAIN SCREWS, set of 4:
$ 32.95



g5) Aftermarket Hitachi carb BOWL DRAIN SCREW. Bright finish 18-8 stainless steel hex-drive, socket head, taper-point screw fits into the drain hole passage of each carb bowl. Works better than the original Yamaha screw; not only is it made of stainless steel, but the larger socket-head design allows for more torque to be applied to the screw, forever ending the stripped/stuck/ruined drain screw problem that has plagued Yamaha owners forever!

Note that by their design, the large socket head portion of this drain screw will be located OUTSIDE of the drain screw bore hole in the bowl, and sticks out about 1/4" from the bowl body. This additional length does not cause any problems, and after looking at them (installed) on the carb bowls, at first glance they might look "odd" the way the stick out, but after the third or fourth look, they appear normal and oddly interesting with that extended length.

NOTE: do NOT "bottom" the heads of these screws against the bowl! Tighten them to 4-5 foot-pounds of torque, just enough to seat them snugly. That is all that is necessary to prevent fuel leakage from the drain port.

Fits all XJ650 (except Turbo), all XJ700 air-cooled models, and all XJ750 air-cooled models. These drain screws will also fit all 1981 (only) XS850 models, 1984-87 Virago XV700, 1981-83 Virago XV750, 1981-83 Virago XV920, and 1984-85 Virago XV1000, and 1986-87 XV1100 carbs..


HCP8878 Aftermarket Hitachi socket-head, hex-drive, stainless-steel carb BOWL DRAIN SCREW, each:
$ 12.95

HCP8878SET2 Aftermarket Hitachi carb BOWL DRAIN SCREWS, set of 2:
$ 24.95

HCP8878SET3 Aftermarket Hitachi carb BOWL DRAIN SCREWS, set of 3:
$ 34.95

HCP8878SET4 Aftermarket Hitachi carb BOWL DRAIN SCREWS, set of 4:
$ 44.95



e5c) OEM and aftermarket Hitachi HSC34 carb bowl drain screw CRUSH WASHER. Use 1 per bowl on all 1980 (only) XS850 models with the drain screw in the bottom center of the bowl.

HCP29922 Aftermarket bowl drain screw CRUSH WASHER. Fits the drain screw used on 1980-only XS850 models with the drain bolt in the bottom center of the bowl……1981 XS850 bowls use a side-entry bowl drain screw (like all other Hitachi carbs). Each:
$ 5.95

HCP29922SET3 Aftermarket bowl drain screw CRUSH WASHERS, set of 3:
$ 14.95



Anti-Seize Lubricants:

xx1) Fastener ANTI-SEIZE PASTE. Yeah, it's smelly and makes a slippery mess on your fingers, but this stuff is a life-saver for any true wrencher, because it prevents problems down the road. Use it on any metal fastener that does not require a "loctite" thread-locker material to be used. This means on just about every fastener that is carb, engine case, or suspension-related! (except for carb upper and lower rack-mount screws and butterfly valve screws, which do require the use of a thread-lock fluid). If you think that it might, sometime, in the future, need to come off: use anti-seize compound! NOTE: the "base" metal material used in the different anti-seize pastes below do not determine what type of fastener to use such pastes on; it merely signifies what base material is used to create the anti-seize paste. You can use any "base-metal" anti-seize paste on any type of fastener and metal.

NOTE: the use of anti-seize compounds will result in a TORQUE-MULTIPLYING EFFECT……..the result of a reduction in friction between the threaded contact points……and thus fasteners treated with anti-seize compound should have their torque values reduced by at least 10-15% when installed into steel material, and up to 25% into aluminum materials or other “soft” metals” (such as spark plugs into cylinder heads, or almost any other type of fastener into the engine) …… note that this rule applies only to service manual torque specifications on fasteners that are not indicated to be treated with anti-seize fluid by the factory …. if the factory manual specifies the use of an anti-seize coating, then the specified torque value for that fitting already takes into account the “reduced torque” necessary.

http://raskcycle.com/techtip/webdoc14.html

http://www.cncexpo.com/MetricBoltTorqueNm.aspx

http://www.bmwmotorcycletech.info/sparkplugs.htm

http://www.antiseize.com/pdf/torque_specifications.pdf


HCP1264 Aftermarket fastener ANTI-SEIZE PASTE, standard grade aluminum-based in a 1-ounce squeeze tube, for smaller jobs.
$ 8.95

HCP29921 Aftermarket fastener ANTI-SEIZE PASTE, standard grade aluminum-based in a 4-gram pillow pack, for individual jobs (enough for a single carb rack, or front-end rebuild, brake system rebuild, etc.)
$ 3.95

HCP1265 Aftermarket fastener ANTI-SEIZE PASTE, standard grade aluminum-based formula in a 4-ounce tub with a brush-lid, for larger jobs.
$ 11.95

HCP9784 Aftermarket fastener ANTI-SEIZE PASTE, standard grade aluminum-based formula in an 8-ounce tub with a brush-lid, a lifetime supply for your motorcycle!
$ 17.95

HCP9763 Aftermarket fastener ANTI-SEIZE PASTE, standard-grade copper-based formula in an 8-ounce tub with a brush-lid, a lifetime supply for your motorcycle!
$ 17.95

HCP9764 Aftermarket fastener ANTI-SEIZE PASTE, premium-grade nickel-based formula in an 8-ounce tub with a brush-lid, a lifetime supply for your motorcycle!
$ 24.95



NOTE: the following product(s) can only be shipped via ground transport (which thus eliminates the postal Priority Mail, postal Express Mail, or private carrier Expedited levels of service for this item) and cannot (and will not----don't even ask!) be shipped outside of the continental USA. Additionally, there may be a per-package weight or quantity restriction, and thus multiple-unit orders of this product may have to be shipped in separate packages and will incur additional shipping charges.

HCP20860 Aftermarket industrial-strength ASSEMBLY LUBE, in a standard 12-ounce aerosol can. Heavy-duty formula includes graphite to not only enhance and speed up the penetrant action, but also gets down into the pores of the metal for the greatest possible lubrication possible. Won't wash away, protect against rust and corrosion, stable from 0-degrees up to 250-F. This fluid is also a great choice for use as a drive cable lubricant.
$ 41.95

HCP20862 Aftermarket super-duty ASSEMBLY LUBE, in a generous 10-ounce aerosol can. The cat's-meow of lubricants, infused with pure moly disulfide, it goes on wet and then dries in 1-2 hours to a super-slick, high-pressure, hi-temp, bearing-like finish which provides the ultimate level of protection. Prevents rust and corrosion, won't wash off, throw off, and won't attract dust or dirt. Surfaces must be clean and dry of previous oils, etc. before application. Can even be used as an engine, tranny, and drivetrain assembly lube!
$ 44.95

HCP20863 Aftermarket super-duty GRAPHITE LUBE, in a generous 10-ounce aerosol can. The 800-pound gorilla of lubricants, it's infused with pure graphite, goes on wet, and then dries in 10 minutes to a super-slick, high-pressure, bearing-like finish which provides the ultimate level of protection. Prevents rust, won't wash off, throw off, and won't attract dust or dirt. Surfaces must be clean and dry of previous oils, etc. before application. Can be used as an engine assembly lube, bearing or bushing pre-lube, great for lock cylinders, and all metallic sliding surfaces. Use where dusty or dirty conditions render oil-based lubricants ineffective or undesirable.
$ 42.95

 

HITACHI FUEL SYSTEM HARDWARE:

HITACHI CARB HARDWARE KITS:

chk1) While you’re completing your carb rebuild efforts, you’ve probably noticed that many of the fasteners and associated hardware pieces are buggered, rusty, incorrect, or worse. Since your carbs will soon be performing as new, why not make them look like new, too? These HITACHI CARB FASTENERS KITS and HITACHI CARB HARDWARE KITS contain all of the major external hardware or fasteners needed to refresh them like a pro, and at an affordable price.


Hitachi Carb Fasteners Kits:

These fastener kits contain all of the major and minor fasteners that you’ll need to refresh a set of carbs, and are available in a variety of material and finishes to suit your particular preferences. NOTE: throttle shaft hardware (butterfly valves screws, shaft end clips, etc) and bowl drain screws are not included in any of these kits, since those items are already contained in the various carb rebuild kits listed previously.

Each kit contains the following items in matching finishes and head styles:
* matched assortment of carb “hat” screws, lockwashers, and a flat washer.
* matched assortment of carb bowl-to-body screws and lockwashers.
* matched assortment of carb upper rack bracket screws, lockwashers, and a flat washer.
* matched assortment of carb lower rack bracket screws and lockwashers.
* matched set of starter shaft retaining screw and lockwasher.
* matched set of starter plunger bracket-to-shaft set screws.
* an idle speed screw plastic washer (not original, but a great addition to have!)

Here are some quick guides that shows the different head and drive styles:



https://www.boltdepot.com/fastener-information/Printable-Tools/Type-Chart.pdf

http://www.oocities.org/dtmcbride/home_garden/fasteners.html


And since you'll want your new hardware to not only look nice, but fit well, the following professional quality tool-steel thread chaser taps will allow you to either "clean-up" or re-thread distorted or stripped threads in all metals, soft (aluminum) to hard (steel).

NOTE: THE FOLLOWING TOOL KITS ARE AVAILABLE FOR RENTAL!!: some tools are a one-time or infrequent use tool, so it may be more economical for you to rent them from us, rather than to purchase outright. Please see the “rental” section within the THE TOOLBOX section of our catalog at:

http://xjbikes.com/forums/index.php?threads/xj-parts-catalog-section-p-the-toolbox.44630

and review the availability and procedures in the TOOL RENTAL section.

HCP28194 Aftermarket carb body THREAD CHASER BASIC TAPS SET. This basic set of 6 taps contains all of the different sizes for the most commonly needed threaded holes on all Hitachi and Mikuni carb bodies. Almost all threaded will exhibit some type of thread wear (distortion) or minor injury that should be repaired, especially to the smaller, more “fragile” threads on the mixture screw bores, the fuel and are jets threads, the bowl, hat, and bracket mounting holes, etc. Running thread taps thru all of these threaded holes in the carb bodies will not only make the re-assembly process easier, smoother, and more secure, but there is a certain satisfaction and surety that comes with having like-new threads that can only be described as “machinist porn” (those of you that know, will know what I mean!). Correct size taps will do the upper and lower rack bracket holes, the float bowl attachment holes, the float bowl drain screw holes, the carb hat attachment holes, synch screws and idle speed bolt holes, the Mikuni float valve seat bracket hole, Mikuni main jet needle retainer plate holes (inside the vacuum piston), all air jet and fuel jet holes, enrichment plunger lifter bracket holes, and throttle shaft butterfly valve mounting holes. Comes with a can of cutting fluid and a t-handle tap holder tool. Note that unlike the complete taps set below (HCP28121), the taps for the Hitachi float valve seat and the choke plunger seat bores (on all Hitachi and Mikuni models) are not included in this set (those larger taps are what add significantly to the cost of the complete taps set). NOTE: due to the reality that you may use these tools only once, it is suggested that you use the tool rental option for this tap set. However, under the rental option, if you use the taps for actual thread tapping (cutting brand new threads in a newly drilled hole), then the return option is not allowed!
$ 99.95

HCP28121 Aftermarket carb body THREAD CHASER COMPLETE TAPS SET. This complete set of 9 taps contains all of the different sizes of threads found on all Hitachi and Mikuni carb bodies. Almost all threaded will exhibit some type of thread wear (distortion) or minor injury that should be repaired, especially to the smaller, more “fragile” threads on the mixture screw bores, the fuel and are jets threads, etc. Running thread taps thru all of the threaded holes in the carb bodies will not only make the re-assembly process easier, smoother, and more secure, but there is a certain satisfaction and surety that comes with having like-new threads that can only be described as “machinist porn” (those of you that know, will know what I mean!). Correct size taps will do the upper and lower rack bracket holes, the float bowl attachment holes, the float bowl drain screw holes, the carb hat attachment holes, synch screws and idle speed bolt holes, the choke plunger seat holes, the Mikuni float valve seat bracket hole, the Hitachi float valve seat hole, Mikuni main jet needle retainer plate holes (inside the vacuum piston), all air jet and fuel jet holes, enrichment plunger lifter bracket holes, and throttle shaft butterfly valve mounting holes. Comes with a can of cutting fluid and a t-handle tap holder tool. NOTE: due to the expense of this kit, and the reality that you may use these tools only once, it is suggested that you use the tool rental option for this tap set. However, under the rental option, if you use the taps for actual thread tapping (cutting brand new threads in a newly drilled hole), then the return option is not allowed!
$ 149.95




HCP21600 Aftermarket HSC32 series HITACHI CARB FASTENERS KIT, featuring zinc-plated alloy steel components with original-style panhead, phillips-drive screws. Note that the starter bracket set screws contained in this kit has the straight-slot drive (as original) rather than a phillips-drive.
$ 39.95

HCP21612 Aftermarket HSC33 series HITACHI CARB FASTENERS KIT, featuring zinc-plated alloy steel components with original-style panhead, phillips-drive screws. Note that the starter bracket set screws contained in this kit has the straight-slot drive (as original) rather than a phillips-drive.
$ 39.95



HCP21601 Aftermarket HSC32 series HITACHI CARB FASTENERS KIT, featuring bright 18/8 stainless steel components with original-style panhead, phillips-drive screws. Note that the starter bracket set screws contained in this kit has the straight-slot drive (as original) rather than a phillips-drive.
$ 44.95

HCP21607 Aftermarket HSC33 series HITACHI CARB FASTENERS KIT, featuring bright 18/8 stainless steel components with original-style panhead, phillips-drive screws. Note that the starter bracket set screws contained in this kit has the straight-slot drive (as original) rather than a phillips-drive.
$ 47.95



HCP21602 Aftermarket HSC32 series HITACHI CARB FASTENERS KIT, featuring bright 18/8 stainless steel components with polished button-head, hex-drive screws.
$ 43.95

HCP21608 Aftermarket HSC33 series HITACHI CARB FASTENERS KIT, featuring bright 18/8 stainless steel components with polished button-head, hex-drive screws.
$ 44.95



HCP21603 Aftermarket HSC32 series HITACHI CARB FASTENERS KIT, featuring bright 18/8 stainless steel components with smooth socket-head, hex-drive screws.
$ 41.95

HCP21609 Aftermarket HSC33 series HITACHI CARB FASTENERS KIT, featuring bright polished 18/8 stainless steel components with smooth socket-head, hex-drive screws.
$ 42.95



HCP21604 Aftermarket HSC32 series HITACHI CARB FASTENERS KIT, featuring black alloy steel components with knurled socket-head, hex-drive screws.
$ 37.95

HCP21611 Aftermarket HSC33 series HITACHI CARB FASTENERS KIT, featuring black alloy steel components with knurled socket-head, hex-drive screws.
$ 38.95



Hitachi Carb Brackets Kits:

Kick it up a notch (or two)……..heck, kick it up to an 11 with these carb bracket kits which contain beautifully re-plated original major and minor brackets, hose clips, and more. Kits vary from model to model in their contents. NOTE: most of the pieces in these kits are re-plated, used parts, and as such, may have minor cosmetic flaws (tooling marks, fastener marks, etc.). Most such marks will not be visible once installed. Also, all re-plated items require a refundable core charge which will be credited back to you upon the return of all of the same-model, same-type kit contents. Since these are re-plated used parts, we do require an exchange for your original parts so we can have a steady supply of parts to be processed and re-plated for future sales.

HCP23820 Aftermarket HSC32 series HITACHI CARB BRACKETS KIT features a complete set of new or re-plated original brackets listed below. Fits all 1980-81 XJ650 Maxim carbs with the short style lower rack bracket and some 1982 XJ650RJ Seca models with the short style lower rack bracket ---- the short style bracket has a small, “split loop” where the idle speed control bolt passes tightly thru it, whereas the “long” style bracket has a larger, “full-circle loop” where the idle speed control bolt passes thru it, and the long style bracket requires the use of the HCP9849 rubber grommet within the loop (or else the idle speed bolt will flop around loosely inside the loop). Please check your original lower bracket to properly identify the “short” vs. “long” style lower bracket, and many 1980-81 models and 1982 XJ650RJ Seca models could have used either the short or long style bracket. NOTE: requires a $ 125.00 core charge, refundable upon the return of all undamaged, same-model, same-type kit contents.
$ 279.95 + $ 125.00 refundable core charge

1 x HCP85 re-plated upper rack bracket
1 x HCP21001 re-plated lower rack bracket (with the “short” style idle speed bracket)
1 x HCP27 re-plated choke shaft
1 x HCP5235 re-plated choke shaft hinge bracket
4 x HCP5251 re-plated choke plunger lifter brackets
1 x HCP347 re-plated choke cable bracket (on #4 hat inner position)
1 x HCP2425 re-plated choke cable bracket clamp
1 x HCP2426 re-plated choke cable bracket clamp screw
1 x HCP900WH choke shaft short bushing
1 x HCP901WH choke shaft long bushing
1 x HCP346 re-plated throttle cable bracket (on #3 hat inner position)
3 x HCP47 re-plated synch screws
3 x HCP45 re-plated synch screw springs
3 x HCP46A re-plated synch plungers
3 x HCP46B re-plated synch plunger springs
1 x HCP95 re-plated idle speed bolt
1 x HCP84 re-plated idle speed bolt spring
1 x HCP21520 reproduction vacuum hose hat clip (on #2 hat rear inner position)
1 x HCP21525 reproduction clutch cable up bracket clip (on upper rack bracket, #3 carb outer position)
1 x HCP289 re-plated air jet cover plate
1 x HCP290 re-plated air jet cover plate screw



HCP23822 Aftermarket HSC32 series HITACHI CARB BRACKETS KIT features a complete set of new or re-plated original brackets listed below. Fits all 1980-83 XJ650 Maxim, 1982 XJ650RJ Seca, 1981-84 XJ750 Maxim, 1981-83 XJ750 Seca, and XJ750 Euro model carbs with the long style lower rack bracket with the long style lower rack bracket ---- the short style bracket has a small, “split loop” where the idle speed control bolt passes tightly thru it, whereas the “long” style bracket has a larger, “full-circle loop” where the idle speed control bolt passes thru it, and the long style bracket requires the use of the HCP9849 rubber grommet within the loop (or else the idle speed bolt will flop around loosely inside the loop). Please carefully check your original lower bracket to properly identify the “short” vs. “long” style lower bracket, and many 1980-81 models and 1982 XJ650RJ Seca models could have used either the short or long style bracket. NOTE: requires a $ 125.00 core charge, refundable upon the return of all undamaged, same-model, same-type kit contents.
$ 269.95 + $ 125.00 refundable core charge

1 x HCP85 re-plated upper rack bracket
1 x HCP86 re-plated lower rack bracket (with the “long” style idle speed bracket)
1 x HCP27 re-plated choke shaft
1 x HCP5235 re-plated choke hinge bracket
4 x HCP5251 re-plated choke plunger lifter brackets
1 x HCP347 re-plated choke cable bracket (on #4 hat inner position)
1 x HCP2425 re-plated choke cable bracket clamp
1 xHCP2426 re-plated choke cable bracket clamp screw
1 x HCP900WH choke shaft short bushing
1 x HCP901WH choke shaft long bushing
1 x HCP346 re-plated throttle cable bracket (on #3 hat inner position)
3 x HCP47 re-plated synch screws
3 x HCP45 re-plated synch screw springs
3 x HCP46A re-plated synch plungers
3 x HCP46B re-plated synch plunger springs
1 x HCP95 re-plated idle speed bolt
1 x HCP84 re-plated idle speed bolt spring
1 x HCP9849 reproduction idle speed screw grommet
1 x HCP21520 reproduction vacuum hose hat clip (on #2 hat rear inner position)
1 x HCP21525 reproduction clutch cable up bracket clip (on upper rack bracket, #3 carb outer position)
NOTE: since the HCP289 air jet cover plate and its HCP290 air jet cover plate screw may not have been used on many of the later model carbs, they are not included in this set.



HCP23821 Aftermarket HSC32 series HITACHI CARB BRACKETS KIT features a complete set of new or re-plated original brackets listed below. Fits 1981 XJ650 Midnight Maxim carbs with the short style lower rack bracket and some 1982 XJ650RJ Seca models with the short style lower rack bracket ---- the short style bracket has a small, “split loop” where the idle speed control bolt passes tightly thru it, whereas the “long” style bracket has a larger, “full-circle loop” where the idle speed control bolt passes thru it, and the long style bracket requires the use of the HCP9849 rubber grommet within the loop (or else the idle speed bolt will flop around loosely inside the loop). Please check your original lower bracket to properly identify the “short” vs. “long” style lower bracket, and many 1980-81 models and 1982 XJ650RJ Seca models could have used either the short or long style bracket. NOTE: requires a $ 125.00 core charge, refundable upon the return of all undamaged, same-model, same-type kit contents.
$ 299.95 + $ 125.00 refundable core charge

1 x HCP5405 re-plated upper rack bracket
1 x HCP5406 re-plated lower rack bracket (with the “short” style idle speed bracket)
1 x HCP5249 re-plated choke shaft
1 x HCP5236 re-plated choke hinge bracket
4 x HCP5252 re-plated choke plunger lifter brackets
1 x HCP5407 re-plated choke cable bracket (on #4 hat inner)
1 x HCP5408 re-plated choke cable bracket clamp
1 x HCP2426 re-plated choke cable bracket clamp screw
1 x HCP900WH choke shaft short bushing
1 x HCP901WH choke shaft long bushing
1 x HCP346 re-plated throttle cable bracket (on #3 hat inner)
3 x HCP47 re-plated synch screws
3 x HCP45 re-plated synch screw springs
3 x HCP46A re-plated synch plungers
3 x HCP46B re-plated synch plunger springs
1 x HCP95 re-plated idle speed bolt
1 x HCP84 re-plated idle speed bolt spring
1 x HCP21520 reproduction vacuum hose hat clip (on #2 hat rear inner position)
1 x HCP21525 reproduction clutch cable up bracket clip (on upper rack bracket, #3 carb outer position)
1 x HCP289 re-plated air jet cover plate
1 x HCP290 re-plated air jet cover plate screw




HCP23844 Aftermarket HSC32 series HITACHI CARB BRACKETS KIT features a complete set of new or re-plated original brackets listed below. Fits 1981 XJ650 Midnight Maxim carbs with the short style lower rack bracket and some 1982 XJ650RJ Seca models with the short style lower rack bracket ---- the short style bracket has a small, “split loop” where the idle speed control bolt passes tightly thru it, whereas the “long” style bracket has a larger, “full-circle loop” where the idle speed control bolt passes thru it, and the long style bracket requires the use of the HCP9849 rubber grommet within the loop (or else the idle speed bolt will flop around loosely inside the loop). Please check your original lower bracket to properly identify the “short” vs. “long” style lower bracket, and many 1980-81 models and 1982 XJ650RJ Seca models could have used either the short or long style bracket. NOTE: requires a $ 125.00 core charge, refundable upon the return of all undamaged, same-model, same-type kit contents.
$ 299.95 + $ 125.00 refundable core charge

1 x HCP5405 re-plated upper rack bracket
1 x HCP21002 re-plated lower rack bracket (with the “long” style idle speed bracket)
1 x HCP5249 re-plated choke shaft
1 x HCP5236 re-plated choke hinge bracket
4 x HCP5252 re-plated choke plunger lifter brackets
1 x HCP5407 re-plated choke cable bracket (on #4 hat inner)
1 x HCP5408 re-plated choke cable bracket clamp
1 x HCP2426 re-plated choke cable bracket clamp screw
1 x HCP900WH choke shaft short bushing
1 x HCP901WH choke shaft long bushing
1 x HCP346 re-plated throttle cable bracket (on #3 hat inner)
3 x HCP47 re-plated synch screws
3 x HCP45 re-plated synch screw springs
3 x HCP46A re-plated synch plungers
3 x HCP46B re-plated synch plunger springs
1 x HCP95 re-plated idle speed bolt
1 x HCP84 re-plated idle speed bolt spring
1 x HCP9849 reproduction idle speed screw grommet
1 x HCP21520 reproduction vacuum hose hat clip (on #2 hat rear inner position)
1 x HCP21525 reproduction clutch cable up bracket clip (on upper rack bracket, #3 carb outer position)
1 x HCP289 re-plated air jet cover plate
1 x HCP290 re-plated air jet cover plate screw




HCP23823 Aftermarket HSC32 series HITACHI CARB BRACKETS KIT features a complete set of new or re-plated original brackets listed below. Fits all 1983 XJ750 Midnight Maxim carbs with the long style lower rack bracket with the long style lower rack bracket ---- the short style bracket has a small, “split loop” where the idle speed control bolt passes tightly thru it, whereas the “long” style bracket has a larger, “full-circle loop” where the idle speed control bolt passes thru it, and the long style bracket requires the use of the HCP9849 rubber grommet within the loop (or else the idle speed bolt will flop around loosely inside the loop). Please carefully check your original lower bracket to properly identify the “short” vs. “long” style lower bracket, and many 1980-81 models and 1982 XJ650RJ Seca models could have used either the short or long style bracket. NOTE: requires a $ 125.00 core charge, refundable upon the return of all undamaged, same-model, same-type kit contents.
$ 289.95 + $ 125.00 refundable core charge

1 x HCP5405 re-plated upper rack bracket
1 x HCP21002 re-plated lower rack bracket (with the “long” style idle speed bracket)
1 x HCP5249 re-plated choke shaft
1 x HCP5236 re-plated choke hinge bracket
4 x HCP5252 re-plated choke plunger lifter brackets
1 x HCP5407 re-plated choke cable bracket (#4 hat inner)
1 x HCP5408 re-plated choke cable bracket clamp
1 x HCP2426 re-plated choke cable bracket clamp screw
1 x HCP900WH choke shaft short bushing
1 x HCP901WH choke shaft long bushing
1 x HCP346 re-plated throttle cable bracket (#3 hat inner)
3 x HCP47 re-plated synch screws
3 x HCP45 re-plated synch screw springs
3 x HCP46A re-plated synch plungers
3 x HCP46B re-plated synch plunger springs
1 x HCP95 re-plated idle speed bolt
1 x HCP84 re-plated idle speed bolt spring
1 x HCP9849 reproduction idle speed screw grommet
1 x HCP21520 reproduction vacuum hose hat clip (on #2 hat rear inner position)
1 x HCP21525 reproduction clutch cable up bracket clip (on upper rack bracket, #3 carb outer position)
NOTE: since the HCP289 air jet cover plate and its HCP290 air jet cover plate screw may not have been used on many of the later model carbs, they are not included in this set.



HCP23824 Aftermarket HSC33 series HITACHI CARB BRACKETS KIT features a complete set of new or re-plated original brackets listed below. Fits all 1985 XJ700 N/NC air-cooled models and the 1984 XJ750RL model carbs. This bracket set is for carbs that originally had a natural aluminum finish; models that used the black-painted carbs can use this brackets set, but many of the brackets will have incorrect finishes. NOTE: requires a $ 125.00 core charge, refundable upon the return of all undamaged, same-model, same-type kit contents.
$ 299.95 + $ 125.00 refundable core charge

1 x HCP20992 re-plated upper rack bracket
1 x HCP20991 re-plated lower rack bracket
1 x HCP5250 re-plated choke shaft
1 x HCP5235 re-plated choke hinge bracket
4 x HCP5251 re-plated choke plunger lifter brackets
1 x HCP23261 re-plated choke cable bracket (on #4 hat inner position)
1 x HCP2425 re-plated choke cable bracket clamp
1 x HCP2426 re-plated choke cable bracket clamp screw
1 x HCP900WH thin choke shaft bushing
1 x HCP13650 thick choke shaft bushing
1 x HCP346 re-plated throttle cable bracket (on #3 hat inner positon)
3 x HCP47 re-plated synch screws
3 x HCP45 re-plated synch screw springs
3 x HCP46A re-plated synch plungers
3 x HCP46B re-plated synch plunger springs
1 x HCP95 re-plated idle speed bolt
1 x HCP84 re-plated idle speed bolt spring
1 x HCP9849 reproduction idle speed screw grommet
1 x HCP21523 reproduction vacuum hose hat clip (on #2 hat front inner position)
1 x HCP21525 reproduction clutch cable up bracket clip (on upper rack bracket, #3 carb outer position)
2 x HCP21526 reproduction vacuum hose up rack bracket clip (on #1 carb outer position)




HITACHI CARB HAT HARDWARE:

Hitachi Carb Hat Brackets:

Our re-plated Hitachi diaphragm cover SHAFTS AND BRACKETS allow you to re-create the original look and beauty of these carb racks. These parts are available re-plated to their correct original yellow-zinc or black-zinc appearance. If you need to replace any missing hardware, or just want to create a show-winning look, then you should start your shopping list here! NOTE: all carb hat brackets and hardware are re-plated, used parts, and as such, may have minor cosmetic flaws (tooling marks, fastener marks, etc.). Most such marks will not be visible once installed. Also, all re-plated items require a refundable core charge which will be credited back to you once you return a same-model, same-type of item(s) as you purchased. Since these are re-plated used parts, we do require an exchange for your original parts so we can have a steady supply of parts to be processed and re-plated for future sales.


HCP347RP OEM re-plated carb hat CHOKE CABLE BRACKET, mounted on the #4 hat inner position. Beautiful yellow-zinc plating brings the top side of these carbs to life. Fits all HSC32-series carbs as used on XJ650 Maxim, XJ650 Euro, XJ650RJ Seca, 1981-83 XJ750 Maxim and Seca, and XJ750 Euro models. Will also fit all XJ650 Midnight Maxim and XJ750 Midnight Maxim models but has a non-correct finish. Does not include the HCP2425RP clamp or the HCP2426 clamp screw listed below. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 49.95 + $ 25.00 refundable core charge

HCP23261RP OEM re-plated carb hat CHOKE CABLE BRACKET, mounted on the #4 hat inner position. Beautiful yellow-zinc plating brings the top side of these carbs to life. Fits all HSC33-series carbs as used on XJ700 air-cooled and 1984 XJ750RL Seca models. Does not include the HCP2425RP clamp or the HCP2426 clamp screw listed below. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 59.95 + $ 25.00 refundable core charge

HCP2425RP OEM re-plated carb hat choke cable bracket CLAMP, mounts to the HCP347RP choke cable bracket listed above. Beautiful yellow-zinc plating brings the top side of these carbs to life. Fits all HSC32-series carbs as used on XJ650 Maxim, XJ650 Euro, XJ650RJ Seca, XJ700 air-cooled models, 1981-83 XJ750 Maxim and Seca, and XJ750 Euro models. Will also fit all XJ650 Midnight Maxim and XJ750 Midnight Maxim models but has a non-correct finish. Does not include the HCP2426 clamp screw listed below. NOTE: requires a $ 15.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 24.95 + $ 15.00 refundable core charge

HCP2426RP OEM re-plated carb hat choke cable bracket CLAMP SCREW, mounts the choke cable clamp to the choke cable bracket on all XJ650 Maxim, XJ650 Midnight Maxim, XJ650 Euro, XJ650RJ Seca, XJ700 air-cooled models, 1981-83 XJ750 Maxim and Seca, XJ750 Midnight Maxim, and XJ750 Euro models. Beautiful yellow-zinc plating brings the top side of these carbs to life. NOTE: requires a $ 10.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 14.95 + $ 10.00 refundable core charge



HCP5407RP OEM re-plated carb hat CHOKE CABLE BRACKET, mounted on the #4 hat inner position. Beautiful black-zinc plating brings the top side of these carbs to life. Fits all HSC32-series carbs as used on XJ650 Midnight Maxim and 1983-84 XJ750 Midnight Maxim models. Does not include the HCP5408RP clamp or the HCP2426 clamp screw listed below. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 59.95 + $ 25.00 refundable core charge

HCP5408RP OEM re-plated carb hat choke cable bracket CLAMP, mounts to the HCP347RP choke cable bracket listed above. Black-zinc plating as original. Fits all HSC32-series carbs as used on XJ650 Midnight Maxim and 1983-84 XJ750 Midnight Maxim models. Does not include the HCP2426 clamp screw listed below. NOTE: requires a $ 15.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 29.95 + $ 15.00 refundable core charge

HCP2426RP OEM re-plated carb hat choke cable bracket CLAMP SCREW, mounts the choke cable clamp to the choke cable bracket on all XJ650 Maxim, XJ650 Midnight Maxim, XJ650 Euro, XJ650RJ Seca, XJ700 air-cooled models, 1981-83 XJ750 Maxim and Seca, XJ750 Midnight Maxim, and XJ750 Euro models. Beautiful yellow-zinc plating brings the top side of these carbs to life. NOTE: requires a $ 10.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 14.95 + $ 10.00 refundable core charge



HCP346RP OEM re-plated carb hat THROTTLE CABLE BRACKET, mounted on the #3 hat inner position. Beautiful yellow-zinc plating brings the top side of these carbs to life. Fits all HSC32- and HSC33-series carbs as used on XJ650 (except Turbo), XJ700 air-cooled, 1981-84 XJ750, and XJ750 Euro models. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 49.95 + $ 25.00 refundable core charge




Hitachi Carb Hat Clips:

HCP21520 Aftermarket Hitachi HSC32-series carb hat VACUUM HOSE ROUTING CLIP, use one on the #2 carb rear inner carb hat screw position, on all XJ650 (except Turbo) and 1981-83 XJ750 engines. This “shepherd’s crook” bright plated clip routes the vacuum hose (in the “crook” part of the clip) away from obstacles. Use 1 per carb bank. Perfectly replaces a commonly missing or rusted original. Use 1 per carb. Each:
$ 12.95

HCP21523 Aftermarket petcock-to-intake manifold VACUUM HOSE ROUTING CLIP, use one on the #2 carb front inner carb hat screw position, on all XJ700 air-cooled engines. This “shepherd’s crook” bright plated clip routes the vacuum hose (in the “crook” part of the clip) away from obstacles. Use 1 per carb bank. Perfectly replaces a commonly missing or rusted original. Use 1 per carb. Each:
$ 12.95

HCP21526 Aftermarket carb body port VACUUM HOSE ROUTING CLIP, use one on the #1 and the #4 carb upper rack bracket outer screw position, on all 1985 XJ700 air-cooled engines. This small bright plated clip routes the long vacuum hose (in the “crook” part of the clip), that comes off the mixture screw ports, away from obstacles. Perfectly replaces a commonly missing or rusted original. Use 2 per carb bank. Each:
$ 12.95




Hitachi Carb Hat Fasteners:

HSC32 model carbs ----used on all XJ650 and XJ750 with Hitachi carbs except the XJ700 air-cooled models and XJ750RL Seca (1984) models, use the following screw configuration:

The short screws are used in any position that does not have a clip or bracket associated with it. You will need to use a total of 10 of these short screws per complete carb rack.

The mid-length screws are used in any position that has a clip or bracket associated with it. You will need to use a total of 6 of these mid-length screws per complete carb rack on the HSC32 model carbs.


HSC33 model carbs ----used on all XJ700 air-cooled models and the 1984 XJ750RL Seca models, use the following screw configuration:

Eleven of the mid-length screws, used in all positions except for the positions which secure the end covers, and for the position that secures the vacuum line clip on the #2 carb.

Five of the long screws, used on the outer carbs outer positions (with the carb end covers) and on the #2 carb with the vacuum line clip.


NOTE: originally, all carb hat screws had a bright zinc-plated finish, panhead style, phillips-drive with a captive lock washer. Current OEM screws and all aftermarket screws do NOT have an integral lock washer and the lock washer must be ordered separately from the choices listed further below.

Replacement screws come in a variety of different finish and head drive styles, so please review the descriptions below carefully!



- These replacement panhead, phillips-drive screws have a bright, zinc-plated finish and are made from alloy steel. Use with the HCP326 or HCP922 lock washers listed further below:

HCP322 OEM Hitachi carb hat short MOUNTING SCREW, zinc-plated alloy-steel, panhead, phillips-drive, each:
$ 6.95

HCP322SET10 OEM Hitachi carb hat short MOUNTING SCREWS, set of 10:
$ 59.95



HCP323 OEM Hitachi carb hat mid-length MOUNTING SCREW, zinc-plated alloy-steel, panhead, phillips-drive, each:
$ 1.95

HCP323SET6 OEM Hitachi carb hat mid-length MOUNTING SCREWS, set of 6:
$ 10.95

HCP323SET11 OEM Hitachi carb hat mid-length MOUNTING SCREWS, set of 11:
$ 18.25



HCP4190 OEM Hitachi carb hat long MOUNTING SCREW, zinc-plated alloy-steel, panhead, phillips-drive, each:
$ 6.95

HCP4190SET5 OEM Hitachi carb hat long MOUNTING SCREWS, set of 5:
$ 33.95



HCP918 Aftermarket Hitachi carb hat short MOUNTING SCREW, zinc-plated alloy-steel, panhead, phillips-drive, each:
$ 1.95

HCP918SET10 Aftermarket Hitachi carb hat short MOUNTING SCREWS, set of 10:
$ 17.95



HCP25913 Aftermarket Hitachi carb hat short MOUNTING SCREW, bright zinc-plated alloy steel, panhead, phillips drive, JIS small-head design as original, each:
$ 3.95

HCP25913SET10 Aftermarket Hitachi carb hat short MOUNTING SCREWS, set of 10:
$ 36.95



HCP919 Aftermarket Hitachi carb hat mid-length MOUNTING SCREW, zinc-plated alloy-steel, panhead, phillips-drive, each:
$ 1.95

HCP919SET6 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 6:
$ 10.95

HCP919SET11 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 11:
$ 18.25



HCP6418 Aftermarket Hitachi carb hat long MOUNTING SCREW, zinc-plated alloy-steel, panhead, phillips-drive, each:
$ 1.95

HCP6418SET5 Aftermarket Hitachi carb hat long MOUNTING SCREWS, set of 5:
$ 8.50




- These replacement panhead, phillips-drive screws have a polished head and are made from an 18-8 stainless steel. Use with the HCP336 lock washers listed further below:

HCP1355 Aftermarket Hitachi carb hat short MOUNTING SCREW, 18-8 stainless-steel, polished panhead, phillips-drive, each:
$ 2.95

HCP1355SET10 Aftermarket Hitachi carb hat short MOUNTING SCREWS, set of 10:
$ 21.95



HCP2641 Aftermarket Hitachi carb hat mid-length MOUNTING SCREW, 18-8 stainless-steel, polished panhead, phillips-drive, each:
$ 2.95

HCP2641SET6 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 6:
$ 14.95

HCP2641SET11 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 11:
$ 22.95



HCP6420 Aftermarket Hitachi carb hat long MOUNTING SCREW, bright 18-8 stainless steel, panhead phillips-drive screw, each:
$ 1.95

HCP6420SET5 Aftermarket Hitachi carb hat long MOUNTING SCREWS, set of 5:
$ 8.95



HCP6421 Aftermarket Hitachi carb hat long MOUNTING SCREW, bright 18-8 stainless steel, small-head (JIS) panhead phillips-drive like original, each:
$ 3.95

HCP6421SET5 Aftermarket Hitachi carb hat long MOUNTING SCREWS, set of 5:
$ 17.95




- These replacement button-head, hex-drive screws have a polished head and are made from an 18-8 stainless steel. Use with the HCP336 lock washers listed further below:

HCP332 Aftermarket Hitachi carb hat short MOUNTING SCREW, 18-8 stainless-steel, polished button head, hex-drive, each:
$ 2.95

HCP332SET10 Aftermarket Hitachi carb hat short MOUNTING SCREWS, set of 10:
$ 21.95



HCP333 Aftermarket Hitachi carb hat mid-length MOUNTING SCREW, 18-8 stainless-steel, polished button head, hex-drive, each:
$ 2.95

HCP333SET6 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 6:
$ 14.95

HCP333SET11 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 11:
$ 22.95



HCP14239 Aftermarket Hitachi carb hat long MOUNTING SCREW, 18-8 stainless-steel, polished button head, hex-drive, each:
$ 2.95

HCP14239SET5 Aftermarket Hitachi carb hat long MOUNTING SCREWS, set of 5:
$ 11.95




- These replacement socket-head, hex-drive screws have a smooth polished head and are made from an 18-8 stainless steel. Use with the HCP336 lock washers listed further below:

HCP329 Aftermarket Hitachi carb hat short MOUNTING SCREW, 18-8 stainless steel, smooth polished socket head, hex-drive, each:
$ 1.95

HCP329SET10 Aftermarket Hitachi carb hat short MOUNTING SCREWS, set of 10:
$ 17.95



HCP330 Aftermarket Hitachi carb hat mid-length MOUNTING SCREW, 18-8 stainless steel, smooth polished socket head, hex-drive, each:
$ 2.95

HCP330SET6 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 6:
$ 14.95

HCP330SET11 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 11:
$ 22.95



HCP6424 Aftermarket Hitachi carb hat long MOUNTING SCREW, 18-8 stainless steel, smooth polished socket head, hex-drive, each:
$ 2.95

HCP6424SET5 Aftermarket Hitachi carb hat long MOUNTING SCREWS, each:
$ 11.95




- These replacement socket-head, hex-drive screws have a ribbed head with a black oxide-coated finish and are made from alloy steel. Use with the HCP342 lock washers listed further below:

HCP339 Aftermarket Hitachi carb hat short MOUNTING SCREW, black oxide-coated steel, ribbed socket head, hex-drive, each:
$ 1.95

HCP339SET10 Aftermarket Hitachi carb hat short MOUNTING SCREWS, set of 10:
$ 17.95



HCP340 Aftermarket Hitachi carb hat mid-length MOUNTING SCREW, black oxide-coated steel, ribbed socket head, hex-drive, each:
$ 1.95

HCP340SET6 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 6:
$ 10.95

HCP340SET11 Aftermarket Hitachi carb hat mid-length MOUNTING SCREWS, set of 11:
$ 18.25



HCP6423 Aftermarket Hitachi carb hat long MOUNTING SCREW, black oxide-coated steel, ribbed socket head, hex-drive, each:
$ 1.95

HCP6423SET5 Aftermarket Hitachi carb hat long MOUNTING SCREWS, each:
$ 8.50



k5) Hitachi carb diaphram cover mounting screw LOCK WASHER.

NOTE: originally, these washers were integral to the mounting screws and featured a bright, zinc-plated finish. Current OEM screws and all aftermarket screws do NOT have an integral lock washer and thus the lock washers must be ordered separately from the choices listed below. These lock washers will fit all of the mounting screws listed above.

HSC32 model carbs ----used on all XJ650 and XJ750 with Hitachi carbs except the XJ700 air-cooled models and XJ750RL Seca (1984) models, use lockwashers on the following screw positions:

All sixteen (16) carb hat screw positions.


HSC33 model carbs ----used on all XJ700 air-cooled models and the 1984 XJ750RL Seca models, use lockwashers on the following screw positions:

All positions that use a long hat screw also use a lockwasher -----used on the outer carbs outer positions (with the carb end covers) and on the #2 carb with the vacuum line clip, a total of 5 per rack.


HCP326 OEM Hitachi carb hat mounting screw LOCK WASHER, zinc-plated alloy steel, each:
$ 3.95

HCP326SET4 OEM Hitachi carb hat mounting screw LOCK WASHERS, set of 4:
$ 14.95

HCP326SET5 OEM Hitachi carb hat mounting screw LOCK WASHERS, set of 5:
$ 17.95

HCP326SET16 OEM Hitachi carb hat mounting screw LOCK WASHERS, set of 16:
$ 54.95



HCP922 Aftermarket Hitachi carb hat mounting screw LOCK WASHER, zinc-plated alloy steel, each:
$ 1.95

HCP922SET4 Aftermarket Hitachi carb hat mounting screw LOCK WASHERS, set of 4:
$ 6.95

HCP922SET5 Aftermarket Hitachi carb hat mounting screw LOCK WASHERS, set of 5:
$ 7.95

HCP922SET16 Aftermarket Hitachi carb hat mounting screw LOCK WASHERS, set of 16:
$ 22.95



HCP336 Aftermarket Hitachi carb hat mounting screw LOCK WASHER, 18-8 stainless-steel, each:
$ 2.95

HCP336SET4 Aftermarket Hitachi carb hat mounting screw LOCK WASHERS, set of 4:
$ 10.95

HCP336SET5 Aftermarket Hitachi carb hat mounting screw LOCK WASHERS, set of 5:
$ 12.95

HCP336SET16 Aftermarket Hitachi carb hat mounting screw LOCK WASHERS, set of 16:
$ 29.95



HCP342 Aftermarket Hitachi carb hat mounting screw LOCK WASHER, black oxide-coated alloy steel, each:
$ 1.95

HCP342SET4 Aftermarket Hitachi carb hat mounting screw LOCK WASHERS, set of 4:
$ 6.95

HCP342SET5 Aftermarket Hitachi carb hat mounting screw LOCK WASHERS, set of 5:
$ 7.95

HCP342SET16 Aftermarket Hitachi carb hat mounting screw LOCK WASHERS, set of 16:
$ 22.95



k5) Hitachi carb diaphram cover mounting screw FLAT WASHER.

NOTE: originally, these washers were integral to the mounting screws and featured a bright, zinc-plated finish. Current OEM screws and all aftermarket screws do NOT have an integral lock washer and thus the lock washers must be ordered separately from the choices listed below. These lock washers will fit all of the mounting screws listed above.

HSC32 model carbs ----used on all XJ650 and XJ750 with Hitachi carbs except the XJ700 air-cooled models and XJ750RL Seca (1984) models, use flat washers on the following screw positions:

Use 1 per carb rack, on the #2 carb rear position where the vacuum line clip attaches (this position receives both a lock washer and a flat washer). .


HSC33 model carbs ----used on all XJ700 air-cooled models and the 1984 XJ750RL Seca models, use flat washers on the following screw positions:

All positions that use a long hat screw also use a flat washer -----used on the outer carbs outer positions (with the carb end covers) and on the #2 carb with the vacuum line clip, a total of 5 per rack.


HCP328 OEM Hitachi carb hat mounting screw FLAT WASHER, zinc-plated alloy-steel, each:
$ 3.95

HCP328SET5 OEM Hitachi carb hat mounting screw FLAT WASHERS, set of 5:
$ 17.95


HCP924 Aftermarket Hitachi carb hat mounting screw FLAT WASHER, zinc-plated alloy-steel, each:
$ 1.95

HCP924SET5 Aftermarket Hitachi carb hat mounting screw FLAT WASHERS, set of 5:
$ 7.95


HCP338 Aftermarket Hitachi carb hat mounting screw FLAT WASHER, 18-8 stainless-steel, each:
$ 2.95

HCP338SET5 Aftermarket Hitachi carb hat mounting screw FLAT WASHERS, set of 5:
$ 12.95


HCP28050 Aftermarket Hitachi carb hat mounting screw FLAT WASHER, grade 316 stainless-steel, each:
$ 3.95

HCP28050SET5 Aftermarket Hitachi carb hat mounting screw FLAT WASHERS, set of 5:
$ 17.95


HCP1356 Aftermarket Hitachi carb hat mounting screw FLAT WASHER, black oxide-coated alloy steel, each:
$ 1.95

HCP1356SET5 Aftermarket Hitachi carb hat mounting screw FLAT WASHER, set of 5:
$ 7.95




HITACHI CARB STARTER / ENRICHMENT / CHOKE CIRCUIT HARDWARE:

Hitachi Carb Starter - Enrichment (“Choke”) Circuit Shaft and Brackets:

Our re-plated Hitachi starter - enrichment (“choke”) circuit SHAFTS AND BRACKETS allow you to re-create the original look and beauty of these carb racks. These parts are available re-plated to their correct original yellow-zinc or black-zinc appearance. If you need to replace any missing hardware, or just want to create a show-winning look, then you should start your shopping list here! NOTE: all enrichment circuit shafts and brackets are re-plated, used parts, and as such, may have minor cosmetic flaws (tooling marks, fastener marks, etc.). Most such marks will not be visible once installed. Also, all re-plated items require a refundable core charge which will be credited back to you once you return a same-model, same-type of item(s) as you purchased. Since these are re-plated used parts, we do require an exchange for your original parts so we can have a steady supply of parts to be processed and re-plated for future sales.


HCP27Y OEM carb starter - enrichment (“choke”) circuit ACTUATING SHAFT, long round shaft that carries the choke plunger lifter “finger” brackets. Beautiful yellow-zinc plating brings the top side of these carbs to life. Fits all HSC32-series carbs as used on XJ650 Maxim, XJ650 Euro, XJ650RJ Seca, 1981-83 XJ750 Maxim and Seca, and XJ750 Euro models. Will also fit all XJ650 Midnight Maxim and XJ750 Midnight Maxim models but has a non-correct finish. Note that some models original came with silver-zinc plating on these shafts.
$ 59.95

HCP27RP OEM re-plated carb starter - enrichment (“choke”) circuit ACTUATING SHAFT, long round shaft that carries the choke plunger lifter “finger” brackets. Beautiful silver-zinc plating brings the top side of these carbs to life. Fits all HSC32-series carbs as used on XJ650 Maxim, XJ650 Euro, XJ650RJ Seca, 1981-83 XJ750 Maxim and Seca, and XJ750 Euro models. Will also fit all XJ650 Midnight Maxim and XJ750 Midnight Maxim models but has a non-correct finish. Note that some models original came with yellow-zinc plating on these shafts. NOTE: requires a $ 20.00 core charge, refundable upon the return of an undamaged, same-model, same-type shaft.
$ 49.95 + $ 20.00 refundable core charge

HCP5249RP OEM re-plated carb starter - enrichment (“choke”) circuit ACTUATING SHAFT, long round shaft that carries the choke plunger lifter “finger” brackets. Black-zinc plating as original. Fits HSC32-series carbs as used on XJ650 Midnight Maxim and XJ750 Midnight Maxim models. NOTE: requires a $ 20.00 core charge, refundable upon the return of an undamaged, same-model, same-type shaft.
$ 59.95 + $ 20.00 refundable core charge

HCP5250RP OEM re-plated carb starter - enrichment (“choke”) circuit ACTUATING SHAFT, long round shaft that carries the choke plunger lifter “finger” brackets. Beautiful silver-zinc plating brings the top side of these carbs to life. Fits HSC33-series carbs as used on XJ700 air-cooled models and 1984 XJ750RL carbs. NOTE: requires a $ 20.00 core charge, refundable upon the return of an undamaged, same-model, same-type shaft.
$ 54.95 + $ 20.00 refundable core charge



HCP5235RP OEM re-plated carb starter - enrichment (“choke”) circuit ACTUATING BRACKET, this is the V-shaped bracket (with the cable-end clasp) which is screwed onto the actuating shaft listed above. Beautiful silver-zinc plating brings the top side of these carbs to life. Fits all HSC32- and HSC33-series carbs as used on all XJ650 Maxim, XJ700 air-cooled, 1981-83 XJ750, and XJ750 Euro models. Will also fit all XJ650 Midnight Maxim and XJ750 Midnight Maxim models but has a non-correct finish. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 39.95 + $ 25.00 refundable core charge

HCP5236RP OEM re-plated carb starter - enrichment (“choke”) circuit ACTUATING BRACKET, long round shaft that carries the choke plunger lifter “finger” brackets. Black-zinc plating as original. Fits HSC32-series carbs as used on XJ650 Midnight Maxim and XJ750 Midnight Maxim models. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 49.95 + $ 25.00 refundable core charge



HCP5251RP-SET4 OEM re-plated carb starter - enrichment (“choke”) circuit PLUNGER LIFTER BRACKETS, set of 4 of the choke plunger-lifter “finger” brackets. Beautiful silver-zinc plating brings the top side of these carbs to life. Fits all HSC32- and HSC33-series carbs as used on all XJ650 Maxim, XJ700 air-cooled, 1981-83 XJ750, and XJ750 Euro models. Will also fit all XJ650 Midnight Maxim and XJ750 Midnight Maxim models but has a non-correct finish. NOTE: requires a $ 20.00 core charge, refundable upon the return of an undamaged, same-model, same-type lifter brackets.
$ 29.95 + $ 20.00 refundable core charge

HCP5252RP-SET4 OEM re-plated carb starter - enrichment (“choke”) circuit PLUNGER LIFTER BRACKETS, set of 4 of the choke plunger-lifter “finger” brackets. Black-zinc plating as original. Fits HSC32-series carbs as used on XJ650 Midnight Maxim and XJ750 Midnight Maxim models. NOTE: requires a $ 20.00 core charge, refundable upon the return of an undamaged, same-model, same-type lifter brackets.
$ 37.95 + $ 20.00 refundable core charge




Hitachi Carb Starter - Enrichment Circuit Cable Brackets:

HCP347RP OEM re-plated carb hat CHOKE CABLE BRACKET, mounted on the #4 hat inner position. Beautiful yellow-zinc plating brings the top side of these carbs to life. Fits all HSC32-series carbs as used on XJ650 Maxim, XJ650 Euro, XJ650RJ Seca, 1981-83 XJ750 Maxim and Seca, and XJ750 Euro models. Will also fit all XJ650 Midnight Maxim and XJ750 Midnight Maxim models but has a non-correct finish. Does not include the HCP2425RP clamp or the HCP2426 clamp screw listed below. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 49.95 + $ 25.00 refundable core charge

HCP23261RP OEM re-plated carb hat CHOKE CABLE BRACKET, mounted on the #4 hat inner position. Beautiful yellow-zinc plating brings the top side of these carbs to life. Fits all HSC33-series carbs as used on XJ700 air-cooled and 1984 XJ750RL Seca models. Does not include the HCP2425RP clamp or the HCP2426 clamp screw listed below. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 59.95 + $ 25.00 refundable core charge

HCP2425RP OEM re-plated carb hat choke cable bracket CLAMP, mounts to the HCP347RP choke cable bracket listed above. Beautiful yellow-zinc plating brings the top side of these carbs to life. Fits all HSC32-series carbs as used on XJ650 Maxim, XJ650 Euro, XJ650RJ Seca, XJ700 air-cooled models, 1981-83 XJ750 Maxim and Seca, and XJ750 Euro models. Will also fit all XJ650 Midnight Maxim and XJ750 Midnight Maxim models but has a non-correct finish. Does not include the HCP2426 clamp screw listed below. NOTE: requires a $ 15.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 24.95 + $ 15.00 refundable core charge

HCP2426RP OEM re-plated carb hat choke cable bracket CLAMP SCREW, mounts the choke cable clamp to the choke cable bracket on all XJ650 Maxim, XJ650 Midnight Maxim, XJ650 Euro, XJ650RJ Seca, XJ700 air-cooled models, 1981-83 XJ750 Maxim and Seca, XJ750 Midnight Maxim, and XJ750 Euro models. Beautiful yellow-zinc plating brings the top side of these carbs to life. NOTE: requires a $ 10.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 14.95 + $ 10.00 refundable core charge


HCP5407RP OEM re-plated carb hat CHOKE CABLE BRACKET, mounted on the #4 hat inner position. Beautiful black-zinc plating brings the top side of these carbs to life. Fits all HSC32-series carbs as used on XJ650 Midnight Maxim and 1983-84 XJ750 Midnight Maxim models. Does not include the HCP5408RP clamp or the HCP2426 clamp screw listed below. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 59.95 + $ 25.00 refundable core charge

HCP5408RP OEM re-plated carb hat choke cable bracket CLAMP, mounts to the HCP347RP choke cable bracket listed above. Black-zinc plating as original. Fits all HSC32-series carbs as used on XJ650 Midnight Maxim and 1983-84 XJ750 Midnight Maxim models. Does not include the HCP2426 clamp screw listed below. NOTE: requires a $ 15.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 29.95 + $ 15.00 refundable core charge

HCP2426RP OEM re-plated carb hat choke cable bracket CLAMP SCREW, mounts the choke cable clamp to the choke cable bracket on all XJ650 Maxim, XJ650 Midnight Maxim, XJ650 Euro, XJ650RJ Seca, XJ700 air-cooled models, 1981-83 XJ750 Maxim and Seca, XJ750 Midnight Maxim, and XJ750 Euro models. Beautiful yellow-zinc plating brings the top side of these carbs to life. NOTE: requires a $ 10.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 14.95 + $ 10.00 refundable core charge




Hitachi Carb Starter - Enrichment Circuit Fasteners:

xx4) Aftermarket Hitachi Starter-Enrichment Circuit Arm-to-Shaft SET SCREW. These replacement screws are used to retain the starter lever "finger" bracket to the starter circuit shaft. Use 4 of these screws per rack. NOTE: originally, these screws had a bright, zinc-plated finish, with a straight slot (flat) head style drive. All aftermarket screws feature an allen-head drive and are slightly shorter (about 1mm) or longer (about 1mm) than the original set screws, but that length differences causes no operational or interference problems.


HCP21376 Aftermarket Hitachi enrichment circuit lever arm-to-shaft SET SCREW, original straight-slot design, zinc-plated alloy steel. Slightly shorter than stock. Each:
$ 1.95

HCP21376SET4 Aftermarket Hitachi enrichment circuit lever arm-to-shaft SET SCREWS, set of 4:
$ 7.50


HCP21375 Aftermarket Hitachi enrichment circuit lever arm-to-shaft SET SCREW, original straight-slot design, 18-8 stainless steel. Slightly shorter than stock. Each:
$ 1.95

HCP21375SET4 Aftermarket Hitachi enrichment circuit lever arm-to-shaft SET SCREWS, set of 4:
$ 7.50


HCP299 Aftermarket Hitachi enrichment circuit lever arm-to-shaft SET SCREW, hex-key drive, black oxide coated alloy steel. Slightly longer than stock. Each:
$ 1.95

HCP299SET4 Aftermarket Hitachi enrichment circuit lever arm-to-shaft SET SCREWS, set of 4:
$ 6.95


HCP300 Aftermarket Hitachi enrichment circuit lever arm-to-shaft SET SCREW, hex-key drive, 18-8 stainless steel. Slightly longer than stock. Each:
$ 1.95

HCP300SET4 Aftermarket Hitachi enrichment circuit lever arm-to-shaft SET SCREWS, set of 4:
$ 6.95



xx5) Hitachi Starter-Enrichment SHAFT RETAINING SCREW, used to retain the starter shaft bracket to the starter circuit shaft. Use 1 of these screws per rack. NOTE: originally, these panhead screws had a bright, zinc-plated finish with a phillips-head drive system, and a captive lock washer. All OEM and aftermarket screws do not come with the captive lock washer, and a lock washer needs to be ordered separate.

HCP292 OEM Hitachi enrichment circuit SHAFT RETAINING SCREW, black oxide coated alloy steel, panhead, phillips-drive. Use with the HCP296 or HCP298 lock washer listed further below. Each:
$ 1.50

HCP898 Aftermarket Hitachi enrichment circuit SHAFT RETAINING SCREW, zinc-plated alloy steel, panhead, phillips-drive. Use with the HCP297 lock washer listed further below. Each:
$ 1.50

HCP293 Aftermarket Hitachi enrichment circuit SHAFT RETAINING SCREW, panhead, phillips-drive, 18-8 stainless steel. Use with the HCP297 lock washer listed further below. Each:
$ 2.50

HCP294 Aftermarket Hitachi enrichment circuit SHAFT RETAINING SCREW, 18-8 stainless steel, socket-head, hex-drive. Use with the HCP297 lock washer listed further below. Each:
$ 1.00

HCP21403 Aftermarket Hitachi enrichment circuit SHAFT RETAINING SCREW, 18-8 stainless steel, button-head, hex-drive. Use with the HCP297 lock washer listed further below. Each:
$ 1.00

HCP295 Aftermarket Hitachi enrichment circuit SHAFT RETAINING SCREW, black oxide coated alloy steel, socket-head, hex-drive. Use with the HCP298 lock washer listed further below. Each:
$ 1.00



xx6) Hitachi enrichment shaft retainer screw LOCK WASHER, use with the above retainer screws. Use 1 of these washers per rack. NOTE: originally, the retainer screw came with a captive lock washer; all OEM and aftermarket screws do not come with the captive lock washer, and a lock washer needs to be ordered separate.


HCP296 OEM Hitachi enrichment shaft retainer screw LOCK WASHER, zinc-plated alloy steel. Use with the HCP292 retaining screw listed above. Each:
$ 1.50

HCP297 Aftermarket Hitachi enrichment shaft retainer screw LOCK WASHER, 18-8 stainless steel. Use with the HCP293, HCP898, HCP21403, or HCP294 retaining screw listed above. Each:
$ 0.95

HCP298 Aftermarket Hitachi enrichment shaft retainer screw LOCK WASHER, black oxide coated alloy steel. Use with the HCP292 or HCP295 retaining screw listed above. Each:
$ 0.95




HITACHI CARB UPPER RACK BRACKET HARDWARE:

Hitachi Carb Upper Rack Brackets:

Our re-plated Hitachi upper rack individual BRACKETS allow you to re-create the original look and beauty of these carb racks. These parts are available re-plated to their correct original yellow-zinc or black-zinc appearance. If you need to replace any missing hardware, or just want to create a show-winning look, then you should start your shopping list here! NOTE: all upper rack brackets are re-plated, used parts, and as such, may have minor cosmetic flaws (tooling marks, fastener marks, etc.). Most such marks will not be visible once installed. Also, all re-plated items require a refundable core charge which will be credited back to you once you return a same-model, same-type of item(s) as you purchased. Since these are re-plated used parts, we do require an exchange for your original parts so we can have a steady supply of parts to be processed and re-plated for future sales.


HCP85RP OEM re-plated carb upper rack lateral BRACKET, long L-shaped bracket carries and aligns all four carb bodies. Beautiful silver-zinc plating brings the top side of these carbs to life. Fits all HSC32-series carbs as used on XJ650 Maxim, XJ650 Euro, XJ650RJ Seca, 1981-83 XJ750 Maxim and Seca, and XJ750 Euro models. Will also fit all XJ650 Midnight Maxim and XJ750 Midnight Maxim models but has a non-correct finish. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 39.95 + $ 25.00 refundable core charge

HCP20992RP OEM re-plated carb upper rack lateral BRACKET, long L-shaped bracket carries and aligns all four carb bodies. Beautiful silver-zinc plating brings the top side of these carbs to life. Fits all HSC33-series carbs as used on XJ700 air-cooled models and 1984 XJ750RL Seca models. Will also fit all XJ650 Midnight Maxim and XJ750 Midnight Maxim models but has a non-correct finish. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 59.95 + $ 25.00 refundable core charge

HCP5405RP OEM re-plated carb upper rack lateral BRACKET, long L-shaped bracket carries and aligns all four carb bodies. Black-zinc plating as original. Fits HSC32-series carbs as used on XJ650 Midnight Maxim and XJ750 Midnight Maxim models. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 59.95 + $ 20.00 refundable core charge



Hitachi Carb Upper Rack Bracket Clips:

HCP21525 Aftermarket Hitachi carb rack CLUTCH CABLE ROUTING CLIP, mounts on the upper rack bracket, #3 carb outer position, on all XJ650 (except Turbo), all XJ700 air-cooled, all XJ750 Seca, XJ750 Euro, and XJ750P (37H) models. Heavy wire "shepherd's crook" shaped clip is secured by the upper rack bracket screw, captures and properly routes the clutch cable on its way to the clutch cover area. Perfectly replaces a commonly missing or rusted original. Use 1 per carb.
$ 12.95

HCP21526 Aftermarket carb body port VACUUM HOSE ROUTING CLIP, use one on the #1 and the #4 carb upper rack bracket outer screw position, on all 1985 XJ700 air-cooled engines. This small bright plated clip routes the long vacuum hose (in the “crook” part of the clip), that comes off the mixture screw ports, away from obstacles. Perfectly replaces a commonly missing or rusted original. Use 2 per carb bank. Each:
$ 12.95



Hitachi Carb Upper Rack Bracket Fasteners:

a7) Aftermarket Hitachi carb upper rack bracket MOUNTING SCREWS, available in both the short and long versions, and in a variety of original and aftermarket styles and finishes.

The short screws are used in every position EXCEPT the #6 screw hole which also holds the clutch cable routing clip. Use 7 of these screws per rack to mount the carbs.

The long screw is used in the #6 position that has the clutch cable routing clip or bracket associated with it. You will need to use 1 of these long screws per complete carb rack.

NOTE: originally, all carb hat screws had a bright zinc-plated finish, panhead style, phillips-drive with a captive lock washer. Current OEM screws and all aftermarket screws do NOT have an integral lock washer and the lock washer must be ordered separately from the choices listed further below.

Also, please note that these screws were originally installed (and should be re-installed) with a low-strength thread locking fluid applied. Therefore, these screws may be VERY difficult to remove and it is highly recommended that you obtain the correct size JIS style screwdriver (or an impact driver) to remove them without stripping the slots.


- These replacement panhead phillips-drive screws have a bright, zinc-plated finish and are made from alloy steel. Use with the HCP913 lock washers listed further below:

HCP60 OEM Hitachi carb upper rack bracket short MOUNTING SCREW, alloy steel, bright zinc-plated finish, panhead phillips-drive. Use with the HCP913 lock washers listed below. Each.
$ 3.95

HCP60SET7 OEM Hitachi carb upper rack bracket short MOUNTING SCREWS, set of 7.
$ 26.95


HCP168 OEM Hitachi carb upper rack bracket short MOUNTING SCREW, black oxide-coated steel, panhead phillips-drive. For use on XJ650 Midnight Maxim and XJ750 Midnight Maxim models only. Use the HCP59 lock washers and HCP65 flat washer listed below. Each.
$ 7.95

HCP168SET7 OEM Hitachi carb upper rack bracket short MOUNTING SCREWS, set of 7.
$ 49.95



HCP304 OEM Hitachi carb upper rack bracket long MOUNTING SCREW, alloy steel with a bright zinc-plated finish, panhead phillips-drive. Use the HCP913 lock washers and HCP914 flat washer listed below. Each.
$ 7.95

HCP4561 OEM Hitachi carb upper rack bracket long MOUNTING SCREW, black oxide-coated steel, panhead phillips-drive. For use on XJ650 Midnight Maxim and XJ750 Midnight Maxim models only. Use the HCP59 lock washers and HCP65 flat washer listed below. Each.
$ 7.95

HCP24040 Aftermarket Hitachi carb upper rack bracket long MOUNTING SCREW, black oxide-coated 18-8 stainless steel, panhead phillips-drive. For use on XJ650 Midnight Maxim and XJ750 Midnight Maxim models only. Use the HCP59 lock washers and HCP65 flat washer listed below. Each.
$ 2.95



HCP910 Aftermarket Hitachi carb upper rack bracket short MOUNTING SCREW, alloy steel, bright zinc-plated finish, panhead phillips-drive. Use with the HCP913 lock washers listed below. Each.
$ 1.95

HCP910SET7 Aftermarket Hitachi carb upper rack bracket short MOUNTING SCREWS, set of 7.
$ 12.95


HCP911 Aftermarket Hitachi carb upper rack bracket long MOUNTING SCREW, alloy steel, bright zinc-plated finish, panhead phillips-drive. Use the HCP913 lock washers and HCP914 flat washer listed below. Each.
$ 1.95




- These replacement panhead phillips-drive screws have a polished finish and are made from 18-8 stainless steel. Use with the HCP57 lock washers listed further below:

HCP62 Aftermarket Hitachi carb upper rack bracket short MOUNTING SCREW, 18-8 stainless steel panhead phillips-drive. Use with the HCP57 lock washers listed below. Each.
$ 2.95

HCP62SET7 Aftermarket Hitachi carb upper rack bracket short MOUNTING SCREWS, set of 7.
$ 15.95


HCP307 Aftermarket Hitachi carb upper rack bracket long MOUNTING SCREW, 18-8 stainless steel panhead phillips-drive. Use the HCP57 lock washers and HCP1353 flat washer listed below. Each.
$ 2.95




- These replacement button head hex-drive screws have a polished finish and are made from 18-8 stainless steel. Use with the HCP57 lock washers listed further below:

HCP308 Aftermarket Hitachi carb upper rack bracket short MOUNTING SCREW, 18-8 stainless steel with a button head and hex-drive. Use with the HCP57 lock washers listed below. Each.
$ 2.95

HCP308SET7 Aftermarket Hitachi carb upper rack bracket short MOUNTING SCREWS, set of 7.
$ 15.95


HCP309 Aftermarket Hitachi carb upper rack bracket long MOUNTING SCREW, 18-8 stainless steel with a button head and hex-drive. Use the HCP57 lock washers and HCP1353 flat washer listed below. Each.
$ 2.95




- These replacement socket head hex-drive screws have a smooth, polished head and are made from 18-8 stainless steel. Use with the HCP57 lock washers listed further below:

HCP310 Aftermarket Hitachi carb upper rack bracket short MOUNTING SCREW, 18-8 stainless steel with a socket head, hex-drive style. Use with the HCP57 lock washers listed below. Each.
$ 2.95

HCP310SET7 Aftermarket Hitachi carb upper rack bracket short MOUNTING SCREWS, set of 7.
$ 15.95


HCP311 Aftermarket Hitachi carb upper rack bracket long MOUNTING SCREW, 18-8 stainless steel with a socket head, hex-drive style. Use the HCP57 lock washers and HCP1353 flat washer listed below. Each.
$ 2.95




- These replacement socket head hex-drive screws have a black oxide-coated finish and are made from alloy steel. Use with the HCP59 lock washers listed further below:

HCP64 Aftermarket Hitachi carb upper rack bracket short MOUNTING SCREW, black-oxide coated alloy steel, with a socket head, hex-drive style. Use with the HCP59 lock washers listed below. Each.
$ 1.95

HCP64SET7 Aftermarket Hitachi carb upper rack bracket short MOUNTING SCREWS, set of 7.
$ 12.95


HCP312 Aftermarket Hitachi carb upper rack bracket long MOUNTING SCREW, black-oxide coated alloy steel, with a socket head, hex-drive style. Use the HCP59 lock washers and HCP65 flat washer listed below. Each.
$ 1.95




c7) Aftermarket Hitachi carb upper rack bracket mounting screw LOCK WASHER. These replacement lock washers are used in all 8 positions. Use 8 of these lock washers per rack. NOTE: originally, these washers were integral to the mounting screws and featured a bright, zinc-plated finish. Current OEM screws and all aftermarket screws do NOT have an integral lock washer and thus the lock washers must be ordered separately from the choices listed below. These lock washers will fit all of the mounting screws listed above.


HCP913 Aftermarket Hitachi carb upper rack bracket mounting screw LOCK WASHER, zinc-plated alloy steel. Use with the HCP60, HCP304, HCP910, and HCP911 screws listed above. Each.
$ 1.75

HCP913SET8 Aftermarket Hitachi carb upper rack bracket mounting screw LOCK WASHERS, set of 8.
$ 9.95



HCP57 Aftermarket Hitachi carb upper rack bracket mounting screw LOCK WASHER, 18-8 stainless steel. Use with the HCP62, HCP307, HCP308, HCP309, HCP310, and HCP311 screws listed above. Each.
$ 2.95

HCP57SET8 Aftermarket Hitachi carb upper rack bracket mounting screw LOCK WASHERS, set of 8.
$ 18.95



HCP59 Aftermarket Hitachi carb upper rack bracket mounting screw LOCK WASHER, black oxide coated alloy steel. Use with the HCP64 and HCP312 screws listed above. Each.
$ 1.95

HCP59SET8 Aftermarket Hitachi carb upper rack bracket mounting screw LOCK WASHERS, black, set of 8.
$ 12.95



d7) Aftermarket Hitachi carb upper rack bracket mounting screw FLAT WASHER. These replacement flat washers are used in only the #6 screw hole which also holds the clutch cable routing clip. Use 1 of these screws per rack. NOTE: originally, these washers has a bright, zinc-plated finish.


HCP914 Aftermarket Hitachi carb upper rack bracket mounting screw FLAT WASHER, alloy steel with a bright, zinc-plated finish. Use with the HCP304 or HCP911 screws listed above. Each.
$ 1.95

HCP1353 Aftermarket Hitachi carb upper rack bracket mounting screw FLAT WASHER, 18-8 stainless steel. Use with the HCP307, HCP309, or HCP311 screws listed above. Each.
$ 2.95

HCP65 Aftermarket Hitachi carb upper rack bracket mounting screw FLAT WASHER, black oxide coated alloy steel. Use with the HCP312 screw listed above. Each.
$ 2.95




HITACHI CARB LOWER RACK BRACKET HARDWARE:

Hitachi Carb Lower Rack Brackets:

Our re-plated Hitachi lower rack individual BRACKETS allow you to re-create the original look and beauty of these carb racks. These parts are available re-plated to their correct original yellow-zinc or black-zinc appearance. If you need to replace any missing hardware, or just want to create a show-winning look, then you should start your shopping list here! NOTE: all lower rack brackets are re-plated, used parts, and as such, may have minor cosmetic flaws (tooling marks, fastener marks, etc.). Most such marks will not be visible once installed. Also, all re-plated items require a refundable core charge which will be credited back to you once you return a same-model, same-type of item(s) as you purchased. Since these are re-plated used parts, we do require an exchange for your original parts so we can have a steady supply of parts to be processed and re-plated for future sales.


HCP21001RP OEM re-plated carb lower rack lateral BRACKET, long L-shaped bracket carries and aligns all four carb bodies as well as providing the loop bracket for the idle speed adjustment bolt. Beautiful silver-zinc plating brings the bottom side of these carbs to life. Fits all HSC32-series carbs as used on all 1980 XJ650 Maxim and XJ650 Euro models, and possibly some very early 1981 XJ650 Maxim and Euro model carbs. This style bracket has a small, “split loop” where the idle speed control bolt passes thru it, and does not use (nor will accept) the HCP9849 grommet below. Will also replace XJ650 Midnight Maxim models which use this style bracket, but has a non-correct finish. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 49.95 + $ 25.00 refundable core charge

HCP5406RP OEM re-plated carb lower rack lateral BRACKET, long L-shaped bracket carries and aligns all four carb bodies as well as providing the loop bracket for the idle speed adjustment bolt. Black-zinc plating as original. Fits HSC32-series carbs as used on some very early 1981 XJ650 Midnight Maxim model carbs. This style bracket has a small, “split loop” where the idle speed control bolt passes thru it, and does not use (nor will accept) the HCP9849 grommet below. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 59.95 + $ 25.00 refundable core charge


HCP86RP OEM re-plated carb lower rack lateral BRACKET, long L-shaped bracket carries and aligns all four carb bodies as well as providing the loop bracket for the idle speed adjustment bolt. Beautiful silver-zinc plating brings the bottom side of these carbs to life. Fits all HSC32-series carbs as used on most 1981-84 XJ650 Maxim and XJ650 Euro models, all 1981-83 XJ750 Maxim and Seca models, and XJ750 Euro models. This style bracket has a large, “full-circle loop” where the idle speed control bolt passes thru it, and requires the use of the HCP9849 grommet below[/b]. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 39.95 + $ 25.00 refundable core charge

HCP21002RP OEM re-plated carb lower rack lateral BRACKET, long L-shaped bracket carries and aligns all four carb bodies as well as providing the loop bracket for the idle speed adjustment bolt. Black-zinc plating as original. Fits HSC32-series carbs as used on most XJ650 Midnight Maxim models and all 1983-84 XJ750 Midnight Maxim carbs. This style bracket has a large, “full-circle loop” where the idle speed control bolt passes thru it, and requires the use of the HCP9849 grommet below[/b]. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 59.95 + $ 25.00 refundable core charge


HCP20991RP OEM re-plated carb lower rack lateral BRACKET, long L-shaped bracket carries and aligns all four carb bodies as well as providing the loop bracket for the idle speed adjustment bolt. Beautiful silver-zinc plating brings the top side of these carbs to life. Fits all HSC33-series carbs as used on XJ700 air-cooled models and 1984 XJ750RL Seca models. NOTE: requires a $ 25.00 core charge, refundable upon the return of an undamaged, same-model, same-type bracket.
$ 49.95 + $ 25.00 refundable core charge



HCP9849 Aftermarket Hitachi idle speed screw rubber GROMMET, fits into the lower carb rack bracket opening where the idle speed screw enters the bracket. This replacement grommet is quite a bit larger than the stock grommet, but fits and works properly. Use a little bit of silicone grease on the screw's shaft where it passes through this grommet and it will be silky-smooth in operation. Fits all XJ650 (except Turbo) with the "long" idle speed bolt bracket, all XJ700 non-X, and all air-cooled XJ750 models using Hitachi carbs. NOTE: all 1980 and some 1981 XJ650 models used a lower rack bracket with "short" idle speed bolt guide bracket. This "short" bracket can be identified by a "split" in the loop which the idle speed adjustment bolt passes through. Most 1981-84 XJ650 models used a "long" style lower rack bracket, and this style bracket can be identified by a fully closed "loop" where the idle speed adjustment bolt passes through it and the use of a rubber grommet. The early style "short" guide bracket does not use a grommet around the idle speed adjustment bolt. This replacement grommet replaces the original grommet on the late style "long" guide bracket.
$ 3.95


HCP4024 Aftermarket Hitachi carb idle speed screw WASHER, not an original part, but if you use a set of these thin flat plastic shimming washers in-between the spring and the screw, and between the spring and the bracket (in other words, on either end of the spring), it greatly reduces the friction between the two and makes the idle screw silky-smooth to adjust! Fits all XJ650, XJ700 air-cooled, and , and XJ750 air-cooled models Each:
$ 3.95

HCP4024SET2 Aftermarket Mikuni carb idle speed screw WASHERS, set of 2:
$ 5.95



Hitachi Carb Lower Rack Bracket Fasteners:

e7) Aftermarket Hitachi carb lower rack bracket MOUNTING SCREW. These replacement screws are used in every position of the lower rack bar to mount the carbs. Use 8 of these screws per rack.

NOTE: originally, these screws had a bright, zinc-plated finish (except for Midnight Maxim models, which were black), panhead phillips-drive style with a captive lock washer. Current OEM screws and all aftermarket screws do NOT have an integral lock washer and the lock washer must be ordered separately from the choices listed further below

Also, please note that these screws were originally installed (and should be re-installed) with a low-strength thread locking fluid applied. Therefore, these screws may be VERY difficult to remove and it is highly recommended that you obtain the correct size JIS style screwdriver (or an impact driver) to remove them without stripping the slots.


- These replacement panhead, phillips-drive screws have a zinc-plated finish and are made from alloy steel. Use with the HCP916 lock washers listed further below:

HCP314 OEM Hitachi carb lower rack bracket MOUNTING SCREW, zinc-plated alloy steel, panhead, phillips-drive. Use the HCP916 lock washers listed below. Each.
$ 3.95

HCP314SET8 OEM Hitachi carb lower rack bracket MOUNTING SCREWS, set of 8.
$ 29.95



HCP915 Aftermarket Hitachi carb lower rack bracket MOUNTING SCREW, zinc-plated alloy steel, panhead, phillips-drive. Use the HCP916 lock washers listed below. Each.
$ 1.95

HCP915SET8 Aftermarket Hitachi carb lower rack bracket MOUNTING SCREWS, set of 8.
$ 13.95



- These replacement panhead, phillips-drive screws have a polished head and are made from 18-8 stainless steel. Use with the HCP319 lock washers listed further below:

HCP316 Aftermarket Hitachi carb lower rack bracket MOUNTING SCREW, 18-8 stainless steel, panhead, phillips-drive. Use the HCP319 lock washers listed below. Each.
$ 2.95

HCP316SET8 Aftermarket Hitachi carb lower rack bracket MOUNTING SCREWS, set of 8.
$ 17.95



- These replacement button head, hex-drive screws have a polished head and are made from 18-8 stainless steel. Use with the HCP319 lock washers listed further below:

HCP317 Aftermarket Hitachi carb lower rack bracket MOUNTING SCREW, 18-8 stainless steel with a polished button head, hex-drive. Use the HCP319 lock washers listed below. Each.
$ 2.95

HCP317SET8 Aftermarket Hitachi carb lower rack bracket MOUNTING SCREWS, set of 8.
$ 17.95



- These replacement socket head, hex-drive screws have a smooth polished head and are made from 18-8 stainless steel. Use with the HCP319 lock washers listed further below:

HCP318 Aftermarket Hitachi carb lower rack bracket MOUNTING SCREW, 18-8 stainless steel smooth polished socket head, hex-drive. Use the HCP319 lock washers listed below. Each.
$ 2.95

HCP318SET8 Aftermarket Hitachi carb lower rack bracket MOUNTING SCREWS, set of 8.
$ 17.95



- These replacement panhead, phillips-drive screws have a black finish and are made from alloy steel. Use with the HCP321 lock washers listed further below:

HCP5335 OEM Hitachi carb lower rack bracket MOUNTING SCREW, alloy steel with a black finish, panhead, phillips-drive. Use the HCP321 lock washers listed below. Originally used on XJ650 Midnight Maxim and XJ750 Midnight Maxim models. Each:
$ 8.95

HCP5335SET8 OEM Hitachi carb lower rack bracket MOUNTING SCREWS, set of 8.
$ 67.95



- These replacement socket head, hex-drive screws have a black oxide-coated finish and are made from alloy steel. Use with the HCP321 lock washers listed further below:

HCP320 Aftermarket Hitachi carb lower rack bracket MOUNTING SCREW, black-oxide coated alloy steel with a ribbed socket head, and hex-drive. Use the HCP321 lock washers listed below. Each.
$ 1.95

HCP320SET8 Aftermarket Hitachi carb lower rack bracket MOUNTING SCREWS, set of 8.
$ 13.95




e7a) Aftermarket Hitachi carb lower rack bracket mounting screw LOCK WASHER. These replacement lock washers are used in all 8 positions. Use 8 of these lock washers per rack. NOTE: originally, these washers were integral to the mounting screws and featured a bright, zinc-plated finish. Current OEM screws and all aftermarket screws do NOT have an integral lock washer and thus the lock washers must be ordered separately from the choices listed below. These lock washers will fit all of the mounting screws listed above.


HCP916 Aftermarket Hitachi carb lower rack bracket mounting screw LOCK WASHER, zinc-plated alloy steel. Use with the HCP314 and HCP915 screws listed above. Each.
$ 1.95

HCP916SET8 Aftermarket Hitachi carb lower rack bracket mounting screw LOCK WASHERS, set of 8.
$ 12.95



HCP319 Aftermarket Hitachi carb lower rack bracket mounting screw LOCK WASHER, 18-8 stainless steel. Use with the HCP316, HCP317, and HCP318 screws listed above. Each.
$ 2.95

HCP319SET8 Aftermarket Hitachi carb lower rack bracket mounting screw LOCK WASHERS, set of 8.
$ 18.95



HCP321 Aftermarket Hitachi carb lower rack bracket mounting screw LOCK WASHER, black oxide coated alloy steel. Use with the HCP320 screws listed above. Each.
$ 1.95

HCP321SET8 Aftermarket Hitachi carb lower rack bracket mounting screw LOCK WASHERS, set of 8.
$ 12.95




HITACHI CARB FLOAT BOWL HARDWARE:

fff) OEM Hitachi carb BOWL-TO-BODY MOUNTING SCREW, stock. Does not come with the lock washer, which has to be ordered below separately. NOTE: original screws had integral captured lock washers, the replacement ones do not. These replacement panhead, phillips-drive screws have a black-oxide finish, as opposed to the bright, zinc-plated finish used originally. Use with the HCP59 lock washers listed below.

HCP2940 OEM Hitachi carb bowl-to-body MOUNTING SCREW, panhead, phillips-drive, black oxide finish, each:
$ 4.95

HCP2940SET4 OEM Hitachi carb bowl-to-body MOUNTING SCREWS, set of 4:
$ 18.95

HCP2940SET16 OEM Hitachi carb bowl-to-body MOUNTING SCREWS, set of 16:
$ 72.95



m5) Aftermarket Hitachi carb BOWL-TO-BODY MOUNTING SCREW, stock style. Does not come with the lock washer, which has to be ordered below separately. NOTE: original screws had integral captured lock washers, the replacement ones do not.

Replacement screws come in a variety of different finish and head drive styles, so please review the descriptions below carefully!


These replacement panhead, phillips-drive screws have a bright, zinc-plated finish as used originally. Use with the HCP913 lock washers listed further below:

HCP2643 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREW, panhead, phillips-drive, bright, zinc-plated finish, each:
$ 1.50

HCP2643SET4 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 4:
$ 5.25

HCP2643SET16 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 16:
$ 14.95



These replacement panhead, phillips-drive screws have a polished finish and are made from 18-8 stainless steel. Use with the HCP57 lock washers listed further below:

HCP302 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREW, 18-8 stainless steel, panhead, phillips-drive, each:
$ 2.95

HCP302SET4 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 4:
$ 9.95

HCP302SET16 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 16:
$ 29.95



These replacement button-head, hex-key drive screws have a polished finish, and are made from a 18-8 polished stainless steel. Use with the HCP57 lock washers listed further below:

HCP303 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREW, button-head, hex-drive, 18-8 stainless steel, each:
$ 2.95

HCP303SET4 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 4:
$ 9.95

HCP303SET16 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 16:
$ 29.95



These replacement socket head, hex-key drive screws have a polished finish, as and are made from a 18-8 polished stainless steel. Use with the HCP57 lock washers listed further below:

HCP56 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREW, socket head, hex-drive, 18-8 stainless steel, each:
$ 2.95

HCP56SET4 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 4:
$ 9.95

HCP56SET16 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 16:
$ 29.95



These replacement socket head, hex-key drive screws have a black-oxide finish, and are made from alloy steel material. Use with the HCP59 lock washers listed further below:

HCP58 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREW, socket head, hex-drive, black oxide coated alloy steel, each:
$ 1.95

HCP58SET4 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 4:
$ 6.95

HCP58SET16 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS, set of 16:
$ 21.95



These replacement panhead, phillips-drive screws have a golden chromate finish, as opposed to the bright, zinc-plated finish used originally, and come with the integral captured lockwasher as original:

HCP1358 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREW with lockwasher, panhead, phillips-drive, gold chromate finish, each:
$ 2.95

HCP1358SET4 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS with lockwasher, set of 4:
$ 9.95

HCP1358SET16 Aftermarket Hitachi carb bowl-to-body MOUNTING SCREWS with lockwasher, set of 16:
$ 29.95




ggg) Replacement Hitachi carb Bowl-to-Body Mounting Screw LOCK WASHERS, available in a variety of finishes to match the above screws,

These replacement lock washers have a black-oxide finish. Use with the HCP2940 or the HCP58 screws listed above:

HCP59 Aftermarket Hitachi carb bowl-to-body black oxide LOCK WASHER, each:
$ 1.00

HCP59SET4 Aftermarket Hitachi carb bowl-to-body black oxide LOCK WASHERS, set of 4:
$ 2.95

HCP59SET16 Aftermarket Hitachi carb bowl-to-body black oxide LOCK WASHERS, set of 16:
$ 6.95



These replacement lock washers have a bright, zinc-plated finish as used originally. Use with the HCP2643 screws listed above:

HCP913 Aftermarket Hitachi carb bowl-to-body bright zinc-plated finish LOCK WASHER, each:
$ 1.00

HCP913SET4 Aftermarket Hitachi carb bowl-to-body bright zinc-plated finish LOCK WASHERS, set of 4:
$ 3.75

HCP913SET16 Aftermarket Hitachi carb bowl-to-body bright zinc-plated finish LOCK WASHERS, set of 16:
$ 5.50



These replacement lock washers are made from an 18-8 stainless steel material for durability. Use with the HCP56, HCP302, or HCP303 screws listed above:

HCP57 Aftermarket Hitachi carb bowl-to-body stainless LOCK WASHER, each:
$ 2.95

HCP57SET4 Aftermarket Hitachi carb bowl-to-body stainless LOCK WASHERS, set of 4:
$ 10.95

HCP57SET16 Aftermarket Hitachi carb bowl-to-body stainless LOCK WASHERS, set of 16:
$ 29.95




HITACHI CARB FLOAT BOWL DRAIN SCREW:

e5) OEM and aftermarket Hitachi carb BOWL DRAIN SCREW. Available in a variety of versions, these taper-point screws will exactly replace the mangled or damaged original screws. Use 1 per bowl on all Hitachi-equipped models: all XJ650 (except Turbo), all XJ700 air-cooled models, and all XJ750 air-cooled models. These drain screws will also fit all 1981 XS850 models, 1984-87 Virago XV700, 1981-83 Virago XV750, 1981-83 Virago XV920, 1984-85 Virago XV1000, and 1986-87 XV1100 carbs.

And if the threaded port in the float bowl where the drain screw fits been injured, or if you want to restore the threads to their like-new condition, this thread chaser tap is what you'll need:

HCP2399 Aftermarket THREAD CHASER AND CLEAN-UP TAP, made from a high-speed titanium nitride coated steel. For the following threaded holes listed below, as well as many other areas of the bike. This 6 x 1.00 pitch is a very common sized thread.
$ 9.95

- Hitachi HSC32 air compensator jet holes.
- Hitachi lower carb rack mount screw holes.
- Hitachi pilot and main air jets port holes (in carb throat, below vacuum piston).
- Hitachi carb bowl drain screw hole.
- All models: gas tank mounting holes for the petcock.
- All models: gas tank fuel sending unit mounting holes.
- Mikuni XJ550, FJ/FZ/YX600, XJ600 Seca Ii, XJ650 Turbo, XJ700-X, XJ750-X, XJ900, XJ1100, and XS1100 lower carb rack bracket screw holes.
- All XJ550 - XJ900 models cylinder head exhaust port stud holes.
- All XJ550 - XJ1100 models cylinder head valvecover mounting bolt holes.
- All XJ550 - XJ1100 and XS1100 models cylinder head cam bearing cap bolt holes.
- All XJ550 - XJ1100 and XS1100 models cylinder head intake manifold bolt holes.
- All XJ550 - XJ1100 and XS1100 models cylinder head valvecover mounting bolt holes.
- All XJ550 - XJ1100 and XS1100 models engine side covers mounting bolt holes.
- All XJ550 - XJ1100 and XS1100 models engine oil pan mounting bolt holes.
- All XJ550 - XJ1100 and XS1100 models engine upper-to-lower crankcase cinch bolt holes (note: some of the mounting holes are different size, and require the use of the larger HCP11028 tap below).
- XJ700-X and XJ750-X cylinder heads and jugs coolant jacket bolt holes.
- Some models: cylinder head cam chain tunnel-to-cylinder jugs cinching studs, for engines that have 2 studs on both the front and rear of the tunnel (models with a single tunnel stud use the HCP11028 tap listed further below).
- Most models: upper crankcase to cylinder jugs stud.
- All models: cam chain tensioner mounting bolt holes.
- Some models: mechanical tachometer drive housing mounting hole.
- exhaust headpipe gas test bolt threaded hole in the bottom of each header pipe.
- exhaust collector input (from header pipe) pinch clamp.
- collector chrome cover retaining bolt hole (XJ1100 models)
- collector chrome cover rear retaining screw hole (XJ1100 models).
- XJ650 Turbo models, turbo housing hole for the right muffler “joiner pipe” mounting bolt holes.


HCP28170 Aftermarket thread tap or EZ-out extractor TAP HANDLE, featuring offset tap handles and fully adjustable head for all m3-m12 size taps and size 0 to ½” extractors. This is the proper way to hold a tap or extractor to insure that the force is directed straight down and doesn’t “wobble” as you are cutting, reaming, or extracting. Much better than using pliers or vise-grips to hold the tool……..
$ 17.95


NOTE: it is recommended that anti-seize compound be used on the screw threads when fitting screws back into the carb bowl passage.


HCP864 OEM Hitachi carb BOWL DRAIN SCREW, panhead, phillips-drive, cad-plated alloy-steel each:
$ 21.95

HCP864SET2 OEM Hitachi carb BOWL DRAIN SCREWS, set of 2:
$ 42.95

HCP864SET3 OEM Hitachi carb BOWL DRAIN SCREWS, set of 3:
$ 61.95

HCP864SET4 OEM Hitachi carb BOWL DRAIN SCREWS, set of 4:
$ 79.95



HCP15785 Aftermarket Hitachi carb BOWL DRAIN SCREW, cheesehead, straight-slot, brass, each:
$ 10.95

HCP15785SET2 Aftermarket Hitachi carb BOWL DRAIN SCREWS, set of 2:
$ 18.95

HCP15785SET3 Aftermarket Hitachi carb BOWL DRAIN SCREWS, set of 3:
$ 24.95

HCP15785SET4 Aftermarket Hitachi carb BOWL DRAIN SCREWS, set of 4:
$ 32.95




g5) Aftermarket Hitachi carb BOWL DRAIN SCREW. Bright finish 18-8 stainless steel hex-drive, socket head, taper-point screw fits into the drain hole passage of each carb bowl. Works better than the original Yamaha screw; not only is it made of stainless steel, but the larger socket-head design allows for more torque to be applied to the screw, forever ending the stripped/stuck/ruined drain screw problem that has plagued Yamaha owners forever!

Note that by their design, the large socket head portion of this drain screw will be located OUTSIDE of the drain screw bore hole in the bowl, and sticks out about 1/4" from the bowl body. This additional length does not cause any problems, and after looking at them (installed) on the carb bowls, at first glance they might look "odd" the way the stick out, but after the third or fourth look, they appear normal and oddly interesting with that extended length.

NOTE: do NOT "bottom" the heads of these screws against the bowl! Tighten them to 4-5 foot-pounds of torque, just enough to seat them snugly. That is all that is necessary to prevent fuel leakage from the drain port.

Fits all XJ650 (except Turbo), all XJ700 air-cooled models, and all XJ750 air-cooled models. These drain screws will also fit all 1981 XS850 models, 1984-87 Virago XV700, 1981-83 Virago XV750, 1981-83 Virago XV920, and 1984-85 Virago XV1000, and 1986-87 XV1100 carbs..


HCP8878 Aftermarket Hitachi socket-head, hex-drive, stainless-steel carb BOWL DRAIN SCREW, each:
$ 12.95

HCP8878SET2 Aftermarket Hitachi carb BOWL DRAIN SCREWS, set of 2:
$ 24.95

HCP8878SET3 Aftermarket Hitachi carb BOWL DRAIN SCREWS, set of 3:
$ 34.95

HCP8878SET4 Aftermarket Hitachi carb BOWL DRAIN SCREWS, set of 4:
$ 44.95



e5c) OEM and aftermarket Hitachi HSC34 carb bowl drain screw CRUSH WASHER. Use 1 per bowl on all 1980 (only) XS850 models with the drain screw in the bottom center of the bowl.

HCP29922 Aftermarket bowl drain screw CRUSH WASHER. Fits the drain screw used on 1980-only XS850 models with the drain bolt in the bottom center of the bowl……1981 XS850 bowls use a side-entry bowl drain screw (like all other Hitachi carbs). Each:
$ 5.95

HCP29922SET3 Aftermarket bowl drain screw CRUSH WASHERS, set of 3:
$ 14.95



Anti-Seize Paste:

xx1) Fastener ANTI-SEIZE PASTE. Yeah, it's smelly and makes a slippery mess on your fingers, but this stuff is a life-saver for any true wrencher, because it prevents problems down the road. Use it on any metal fastener that does not require a "loctite" thread-locker material to be used. This means on just about every fastener that is carb, engine case, or suspension-related! (except for carb upper and lower rack-mount screws and butterfly valve screws, which do require the use of a thread-lock fluid). If you think that it might, sometime, in the future, need to come off: use anti-seize compound! NOTE: the "base" metal material used in the different anti-seize pastes below do not determine what type of fastener to use such pastes on; it merely signifies what base material is used to create the anti-seize paste. You can use any "base-metal" anti-seize paste on any type of fastener and metal.

NOTE: the use of anti-seize compounds will result in a TORQUE-MULTIPLYING EFFECT……..the result of a reduction in friction between the threaded contact points……and thus fasteners treated with anti-seize compound should have their torque values reduced by at least 10-15% when installed into steel material, and up to 25% into aluminum materials or other “soft” metals” (such as spark plugs into cylinder heads, or almost any other type of fastener into the engine) …… note that this rule applies only to service manual torque specifications on fasteners that are not indicated to be treated with anti-seize fluid by the factory …. if the factory manual specifies the use of an anti-seize coating, then the specified torque value for that fitting already takes into account the “reduced torque” necessary.

http://raskcycle.com/techtip/webdoc14.html

http://www.cncexpo.com/MetricBoltTorqueNm.aspx

http://www.bmwmotorcycletech.info/sparkplugs.htm

http://www.antiseize.com/pdf/torque_specifications.pdf


HCP1264 Aftermarket fastener ANTI-SEIZE PASTE, standard grade aluminum-based in a 1-ounce squeeze tube, for smaller jobs.
$ 8.95

HCP29921 Aftermarket fastener ANTI-SEIZE PASTE, standard grade aluminum-based in a 4-gram pillow pack, for individual jobs (enough for a single carb rack, or front-end rebuild, brake system rebuild, etc.)
$ 3.95

HCP1265 Aftermarket fastener ANTI-SEIZE PASTE, standard grade aluminum-based formula in a 4-ounce tub with a brush-lid, for larger jobs.
$ 11.95

HCP9784 Aftermarket fastener ANTI-SEIZE PASTE, standard grade aluminum-based formula in an 8-ounce tub with a brush-lid, a lifetime supply for your motorcycle!
$ 17.95

HCP9763 Aftermarket fastener ANTI-SEIZE PASTE, standard-grade copper-based formula in an 8-ounce tub with a brush-lid, a lifetime supply for your motorcycle!
$ 17.95

HCP9764 Aftermarket fastener ANTI-SEIZE PASTE, premium-grade nickel-based formula in an 8-ounce tub with a brush-lid, a lifetime supply for your motorcycle!
$ 24.95



NOTE: good used carb bodies and bowls are also available, please inquire.