Help. I have read several posts by people who have had similar problems, but not exactly the same as mine. I have a 96 GS, V&H pipe, K&N pod filter. The carbs were jetted with a factory 10 kit. My friend cleaned the carbs last month, and checked the jets. I have 125 mains, 40 pilots. The problem is the bike dies when running at freeway speeds, like its out of gas, even though the tank is full. A mech. told me to run on RES or PRI and see if it does it again, after this it ran fine. But now it's doing it again no matter what setting the petcock is set at. The fuel filter is clean, and there seems to be fuel flowing out of the tank, and into the carbs. Any suggestions would be appreciated.
I am not a mechanic but how long since you sinched your carbs?
I have/had the same problem. After going through a couple months digging here is what I have found.
Petcock is highly unlikely to completely fail, Test in PRI position.
Still fails then.
Open gas tank and let it just rest back down on the neck (so its open) and try again. (to verify that its not a vaccume created inside the tank)
Still fails.
Remove gas tank and clean screen on petcock in tank (2 screws underneath, and where the fuel lines come out of)
Still fails.
Check your float height.
Still fails.
Call god. :thumb:
I don't know a thing about the factory 10 kit, but 125 mains sound very small to me for pod filters + full system. Have you checked your plugs after a wild run at WOT? You may need bigger mains. See also other posts, I think KevinC suggests 135, and Srinath 150 for your setup.
I had the carbs completely torn down, cleaned, seals replaced, and re-synched a little over a month ago. I have tried the open tank thing and that didn't really help. The screen in the tank is clear of any obstructions. The plugs show normal wear. The problem only seems to happen at higher speeds. I'm getting ready to tear the carbs apart again, and try the 150 Mains, to see if that helps. I really appreciate all the help, it's just a miracle that I haven't pushed this bike into the lake. Have had nothing but problems since the warranty expired.
try drainin the jets
Lita's '00 bike does the same thing. I thought I had it fixed until last month when we took a trip thru Atlanta. On the way home while trying to keep up with traffic (85+mph) her bike started doing the lose power and die thing while it had over a half tank.
My current fav theory is that the fuel selector is the culprit. I think at higher rpms the engine isn't pulling enough vacuum (because the slides are WFO) to pull the fuel selector diapharm completely open, and so the carbs aren't getting filled fast enough.
I can't really think of any solution, short of removing the diaphram or installing a pingle valve. But that means either remembering to turn it on or off or risk flooding the carbs.
Quote from: JamesGBut that means either remembering to turn it on or off or risk flooding the carbs.
Had a similar problem. I just risk flooding the carbs right now. I'm lazy like that. :)
Uhmmmm, if it were a vacuum problem, it would run fine on PRI, wouldn't it?
Maybe floats level too low?
Before you tear the carbs apart and change the main, do a long stretch at WOT, hit the kill switch and check the color of the plugs. Also, you could call Factory Pro and ask what they suggest for your setup.
Stage 10 is not for K&N and pipe its for a near stock bike with maybe a UNI and a slip on style can at the max...stage 30 is for K&N and pipe and 150 mains are with stock needle not with a jet kit needle but still 125 is several sizes too small...atleast 10 short if not more.
Cool.
Srinath.
Well tore the carbs apart again. Cleaned them, and tried both 150's, and 135 pilots. The problem with these was the idle would not go lower than 2000 rpm and that was with the idle screw all the way out. We checked the float height, needles, everything. Had to put the 125's back in just to get it to run at a normal pace. But I'm still having the starvation problem. I've replaced both valves, so I doubt that it is that. As much as I enjoy this bike, I'm really getting feed up with it constantly breaking down.
While your at it , check your intake pipes, (go from the carbs to the engine block) over time the oscillation causes the rubber to tear. I had the same problem and it was a combination of my electrical system and cracked intake pipes. My bike still needs my one plug to be gapped realy wide to run right...no-one seems to know why..but it works like that..so.. :mrgreen: