:sad: We wanted to correct the breaking up at mid to full throttle, we lowered the needle clip one position to make it richer, took it for a ride and it seemed to help, also raised the idle. We then cleaned the k&n air filter, adjusted the two screws on top of the carberators to bring down the idle, took it for another ride, and now it is worse than what we started. main jet is 320, clip in 3rd position, fmf exaust mild port job, cool head. We need help, the engine sounds like it is reving fast and the bike can't ketch up, also some backfiring.