My bike has been sitting through the winter and it still starts up well, but it revs up to a medium rpm in the idle position. I have already checked the throttle, and nothing is getting stuck or binding up. Throttle moves smoothly, cleanly, and all the way open and closed again. Cable slack IS allowing it to close.
The inside of the carb looks VERY clean. There is NO fuel resin or gunk at all. Why would it rev up? This happened to my other bike as well, even after a good carb cleaning, so I think this is a common issue.
2007-06-28 13:12:24 · 1 answers · asked by fmdrumstix 1 in Cars & Transportation ➔ Motorcycles
Did you try turning the idle screw?
Possibly an air leak.
If the idle comes down when you apply the choke, that would be adding more fuel to compensate for the additional air.
Could be when you re-installed the carb, it didn't make a good seal to the intake manifold.
Spray wd-40 around the manifold while the bike is racing to locate the leak.
Or it could be a leaking L side crankshaft seal.
2007-06-28 14:38:21 · answer #1 · answered by guardrailjim 7 · 1⤊ 0⤋