1998 KLR 650 Carb problems
I bought a carb kit for my KLR and removed the carb to clean and re-build it. I previously had a problem with the carb leaking if I did not turn the petcock off. Cleaned the carb, blew it out with air and installed the new kit. Carb float set at 17.5mm per specifications.
I installed the carb and the bike ran much better, idled fine and ran great through out the rpm range. It still leaks fuel if the petcock is not closed.
Removed the carb and played with it on the bench with a remote fuel tank. No matter what I do, fuel comes up around the venturi needle jet and dribbles out. I checked the float valve with piece of fuel line and air pressure. It seals with air while inverted. I have started checking the carb with just water and itcontinues to leak no matter the position of the float setting. I have installed 3 new float check valve needles and it still leaks. Valve seat has been cleaned with valve lapping compound and a Q-tip mounted in a drill.
What the hell am I missing here?????? simple design. Petcock has been replaced with a no vacuum version and the upper vent line on the carb is blocked off.
Last edited by Doc279; 12-29-2017 at 09:09 PM.