olpanrider wrote:Just as a quick test take a couple really small c-clamps or small vise grips and put them at the end of the pipes to break up the exhaust pulse.. bet it helps.. also if you remove the air cleaner with it running blip the throttle is there's a cloud of gas coming out carb its reversion.
hank2 wrote:Good advice on what to check by several folks. I never worked on Harleys, but if it has a silly big duration cam in it, the actual cylinder compression is likely pretty low. Unless higher compression pistons, etc. were put in to compensate.