Just a couple quick questions...how do the bleed holes work on a pilot jet?
My bikes running great these days (except when it's cold) and I'm at a mile high. Jetting actually seems pretty good except I don't have much on the high end of the throttle.
I run - Pretty open pipe, stock jets, air screw out 2 1/4 turns, 1/2 spacer. I purchased Lancer's kit but haven't messed with anything yet. I was thinking of going up on one step on both the pilot and the main. One of the jets Lancer sent has bleed holes...how's that work?

Also, if I buy a Raptor petcock do I just cap the vac port on the carb?

Thanks a bunch

Bubba wrote on 04/12/10 at 11:09:15:

You need a least a richer high speed jet to get the higher end power even a stock motorcycle needs richer jets than what comes in them.

i think we need lancer to clarify this issue  

At a mile high, you probably don't need any more fuel than what you have now. Jet only the range that needs jettin, if any.

And no matter how you jet, you ain't never goona have good high end power at 1 mile high. There just ain't enough air up there.

Bubba wrote on 04/12/10 at 11:09:15:


Here's another way to skin that cat:





I squirted a bit of RTV into the hose before folding it.

Thanks Lancer, here is what I have so far...fairly open pipe but it does have some resonator/baffle to create some back pressure, K&N drop in air filter.
I first replaced the stock spacer with a #4 nylon spacer from ACE, that eliminated the midrange surging I was getting when I first bought the bike.
Rode that way for a few months but didn't feel like I had any power on the upper throttle range (which I don't use much!) so I put in a 150 main from Lancer's kit....worked as expected (good!) although I was getting some serious POP on shut down.
Installed the 52.5 w/ bleed holes from Lancer. That seemed to help with some of the low end sputtering I was getting in cooler weather (although I really think that is the vac petcock which I'm replacing with a Raptor arriving tomorrow) and seems to have eliminated the POP on shut down. I also now have the air screw out only 2 turns which is good.
I sometimes get some afterfire when really winding it out between gears but really nothing to write home about.

I just took everyone's advice and went slow to see how the bike would react. So far it's been fun.
I think I'm very happy now!!!!

I run the stock 52.5 and I'm at 2 1/4 turns out. I tried a 55 with bleed holes and the screw had to be all the way in and still ran too rich. So I went back to the 52.5.

ralfyguy wrote on 06/02/10 at 15:36:53:


that is strange