newbee carbs air box

hi all my 82 750 maxim has no air box,was going to do pods is this a good idea or should i buy air box . rhight now wont run or idle properly , could this happen with no air box

 

Hello James.
You have two options, each with it's benefits and detractors.
Restoring the factory box is the way to go if you don't wish to mess with the jetting in the carbs but this requires the engine being pulled to get the stocker back in place.
Pods are the easiest to install but will require some jetting and tweaking.

Either way, you have a bit of work cut out for you.
Finally, your bike will not run right without either pods or the airbox in place. It will not start easily without a fistfull of throttle and will not hold an idle. Best be making your choice, the bike doesn't like life without either.

 

hi ok explains the air box being cut in 20 parts when received bike pull motor ok cant sqezze it in.. lol what kind of tweaking on the pods.what would happen just installing pods.as to way it would run.

 

If you just pop the pods into place, you will have a very lean fuel mixture. This is not a good thing to do to an aircooled engine as the combustion chamber will get too hot. You, at a minimum, will need to richen up the fuel mixture and, at best, rejet the jets with fatter(richer) jets.
You can run the machine without jetting, just don't do it for long (fire it up and idle it about 5 minutes or so) or ride on it. It's just a situation best avoided.

 

as far as rejetting do i have to drill for fatter jets .or can i richen fuel mixture only an so how many turns out for mixture screw right now 3 turns out.

 

Fatter jet are available if you decide to go that route:

Main & Pilot Fuel Jets:


ee) Aftermarket Hitachi MAIN FUEL JETS, sizes as follows, fits all XJ650 (except Turbo), all XJ750, and all XJ700 (exc. "X") models.


HCP873 #110 MAIN FUEL JET
HCP874 #112 MAIN FUEL JET
HCP875 #116 MAIN FUEL JET
HCP876 #118 MAIN FUEL JET
HCP877 #120 MAIN FUEL JET
HCP878 #122 MAIN FUEL JET
HCP879 #124 MAIN FUEL JET
HCP880 #126 MAIN FUEL JET
HCP881 #128 MAIN FUEL JET
HCP882 #130 MAIN FUEL JET
HCP883 #132 MAIN FUEL JET
HCP884 #134 MAIN FUEL JET

Any size jet from above:

$ 3.25 each
or
$ 11.00 for a set of 4 (mix-and-match different sizes okay)


NOTE: most stock Hitachi XJ series carbs used either the #110 (650 models) or #120 (750 models) main fuel jets. All the other sizes are for "tuning" or re-jetting purposes when changing intakes or exhaust systems. XJ700 (non-X) models with Hitachi carbs originally used #107 main fuel jets, which are not currently available.


http://www.xjbikes.com/Forums/viewtopic ... t=135.html

 

Thanks for chiming in Chacal, you are a saving grace (timely too!).
James, some folks will drill out their jets to get where they wish to be but I'm a little more cautious. #1 don't believe the markings on your drill bits unless you have measured them out to spec. #2 if you happen to need to move back to a smaller jet, you would need to solder the too big hole back up and re-drill, a bit more complicated than having a dedicated set of jets ready to drop in. Cleaner and faster in my opinion. Spring the dough for the jet kit and purchase piece of mind.
Best of luck.

 

hi is their a jet kit for running pods an a strait exhaust ty. and where do you get it im sorry new at thgis work on cars all day not bikes. lol

 

Most manufacturers will provide a jet kit (high end folks) with the exhaust to fit the application. If you bought it second hand, you should contact the manufacturer (if you know who it is) and get specs. Then buy the appropriate jets to start with. Jet kits are available but they tend to get expensive and you get a bunch of jets you will never use. Do some homework and get with Chacal to set yourself up with what you need.
As far as working on cars, the experience and fundamentals are the same. Just a slight change in arrangement. Fear not, jump right in.

 

im curious when rejetting how does one go about it doing it by himself/herself? by that i mean how can you find the right jet you need without taking it into the shop? colortune?

for example: xj750 seca 4 into 1 exaust with pod air filters on. do you just start putting in progressivly fatter jets and then test with colortune? kinda interested in this.