Can't seem to pinpoint whats wrong with my 426. Did a top end (piston, rings, valve springs, shims, cam chain, hotcams ex auto cam) and carb clean about 20 hours ago. Bike ran great the first few rides.
The last 3 hours or so. It will always start first kick with or with the hot start, it will idle great when cold and usually for about 20 seconds or so when hot (until it erratically stumbles and dies). It runs well when you aggressively open the throttle from any position, but has a constant stumble from idle to about 1/2 throttle once you start rolling back on the throttle again. This trend is very consistent once hot. It is not a "bog". The more aggressively you ride it the worse it gets.
I have cleaned the carb, changed all the jets and settings multiple times and have still not resolved it. Everything seems to be installed correctly, I've tried a different gas cap and vent, cleaned the petcock, changed and checked the spark plug and checked all the electrical connections.
Any ideas or suggestions? I really don't wan't to tear it down too far again unless I have to.
Float height? Air leak? Bad CDI? Bad or improperly worn cam??
Its extremely annoying