James, Yeah I think your right about the needle setting...I'll go back to the #3 clip position. The reason I went down to the #4 clip, is that I was having a problem when I would blip the throttle to wheelie over something, the engine would die. That seemed to help. I went back to the original settings (mj#165 pj #42 fuel screw out 2 turns) and I am starting over from there. I fouled a plug today so I think my low throttle settings are a little rich...I think cause of the clip position. I'll be moving back to the #3 clip...so what about the quick blip problem? I still think I am a little lean on the top end. It has a shearing noise and cuts out at WOT. after reading everyones input. I understand now, how it all works. I was doing too much at once before. Thanks for the help.