PVC FJ 600 Intake

I'll start out by saying that whenever possible I do prefer to use a stock air box on CV type carbs, but the FJ I've been mess'in with did not have an airbox and all that remained on the bike was one dry-rotted, smashed Uni-pod. I've seen one on Ebay but it was incomplete and somewhat trashed so I'm going to pass on that for now. I've used plumbing parts for air boxes before and have checked out some of the ones members here have put together so I thought I would see how these CV's responded. Decided to go with 2 Emgo's I had laying around here.




Good news is, the bike started easy needing little choke and seemed to rev ok. Bad news is, I need to rig up a spot for the battery now and until then I can't take it for a spin. Tight squeeze behind pods, but it will fit. I would hate to have to take the battery out in order to pull pods or carbs though. Any idea's?

I'm curious if the 2 carbs stacked behind the pods are going to act differently then the 2 outboard ones. As it sits now the outboards have larger main jets from P.O. but I can't make out the numbers for the sizes. I could swap with the 2 in the middle if needed.

 

I'm curious as to what that small belt is driving in the first picture. Never seen something there before, but then again I've never seen the guts of an FJ 600 before.

 

It's the belt to adjust the mono shock.

 

Really??? never thought of that but it makes sense and probably makes adjusting the shock easier.

 

i was going to ask about the belt, too, but thats pretty cool what it does, and i love the intake- with the way you're running the intake, you could make the intake 2 pieces, which would be nice and easy to remove...
but i like it

 

good day eh,

interesting set-up, but i'm wondering.....why don't you just use 4 pods?

i would use the same jetting in all four carbs regardless of the air filtering set-up.

i have a fz600. i'm installing fj600 carbs on the bike with pod filters. why? because the fj has 32mm carbs vs. the 30mm carbs on the fz. (bike is a vintage racer). i just got a dynojet kit for the fj carbs (stage 3 for a bike with pods and a 4-1 pipe). some info you may find helpful in setting up your fj carbs for the pods. the stage 3 jet kit uses the stock pilot jets. only the needles and main jets are changed. main jets are 3-4 steps larger than stock. my thoughts are this: if you are going to try jetting the fj, keep the stock pilots as is, and go up 3-4 steps on main jet size. ...and you could try shimming up the stock needles with one or more washers to richen them up. basically this is what my dynojet kit offers. just a thuoght to get you headed in the right direction.

let us know how things work out, hubie.

 

My experience with CV carbs (Constant Velocity) has been that they like the air that is coming in to be somewhat restrained to operate properly and send the slide up at just the right moment. Pods seem like the easy fix but in many cases guys end up spending alot of time and money trying to get them to work and then end up going back to a box.

 

If I could find a generic version of this(forgot to mention I'm a cheap ass) I could free up some space.
http://www.knfilters.com/search/product ... od=RC-2282

 

yes, they can be tricky to tune. thats why i went for the dynojet stage 3 kit - which is made specifically for pods and a 4-1. they've done the work for me (at a price).

i've podded other bikes from the 80's and the power differences were huge. i think alot of people don't bother to spend the time to get the jetting right.

 

FJBell,

I recently just did something similar to my XJ650. I decided to go the pvc route mainly because of cost. I also didn't have to re-jet. I have noticed a positive power increase. I only went with one filter on the side for now. It's not a finished product as of yet but it looks & sounds nice. Did you notice a performance differance? Good or Bad? Thanks

 

jnimrod420,

Have not been able to road test mine yet but it does idle and rev better then without anything. Like I said I don't have the stock box to compare to and previous owners have messed with the jetting. I like the way yours came out, it goes well with the bike. What is the metal housing from and is it open on the back side or the bottom for the air to flow into?

 

boyoboy,
I'm curious to here how the Dynojet comes out you may have sold me, few questions though. What elevation do you ride the bike at the most, is it going to be a track bike only, any idea what size the drill bit is for the slides?

 

hi, i just got the dyno jet kit from star cycle - $180 to canada with tax, duty and shipping...ouch. listed price was $110.

my bike is track only. i have a full wolf pipe going on with the fj carbs and pods. the bike is still stored and i need to get a trailer hitch on my new car before i can trailer the bike home.

i have alot on my plate and right now the priority is the dirt bikes for me and the kid - need chain sprockets etc. so it may really be 4 weeks or more before i install. i will report back how it goes, and maybe even run the bike on a dyno - numbers would be cool.

regards, hubie.

EDIT: I'M LOCATED ON THE SHORE OF LAKE ONTARIO- hope thats enough info for the elevation!?

EDIT 2: ~300 FEET ABOVE SEA LEVEL

 

FJBell,

The metal housing is a mini chrome air filter I picked up from autozone for $12. The solid metal piece on top is a piece of stainless steel I had laying around. I just bent it around the top to protect it from the dreaded out of nowhere rain storms we get in Florida. The bottom of the housing is open and breathes fine. I really like your setup too.

 

Being close to sea level works well as I think those kits are tuned at about the same elevation. Here in Denver we are at about 5300 ft so the carbs are fighting a little more for air. You would think that pods might help that problem.

 

Nice.

 

i just did something simular but instead of using two filters i just used one in the left side and had plenty of room for the orignal batery box

 

Man im diggin the pvc intake idea myself, looks good on both bikes. Would either one of you happen to have any pics of the intake while putting it together, plus how do they mount to the carbs, cant realy tell from the pics on here. :idea:

 

Sorry no pics of the fab. Started out at Home Depot and just started fitting things together to get the shape, I used the Schedule 40 (I think) plumbing parts. Once home I had to trim the ends of parts to get the right alignment. To attach I used the cheaper rubber couplers with the metal bands and hose clamps. I cut the coupler in half so I could use it for 2 carbs and drilled out the rivots on the hose clamps that were attaching it to the metal band. Thru the metal band in the catch all box for another day. Cost for plumbing parts less then $15 and the filters can be found at Z1Enterprises.com for $22 shipped. Hope that helps.

 

Hi FJbell, seems the links to your pictures have died, is there any chance you could host them again please, or put details of the fittings you used/sizes? Im needing to do this to my bike soon as im currently running a bit of cloth cableties over the back of the filters, hopefully if i can make a pvc intake with a single pod filter and fix my exhaust system it will be worth getting it jetted correctly.


Cheers
John

 

pm sent

 

Nothing in my inbox chap, want me to pm you my email address if thats ok?


Cheers
John

 

I resent...email would work.