What should I change with my jetting when the motor breaks down,miss's at almost full throttle. I'm useing standard air jets maj200 & paj75. mj155 & pj42. needle DRM#4. bottem & mid range is fabuous. Wheel stands every where. The bike is wr timed with lid off. From what I've read it sounds like it is too rich, but I'm only running a #155mj with a #200maj which sounds lean compared to what other people are useing. I've tryed coming up one clip, needle down one but it never improved any. Only dropped mid range performance. I've tryed bigger mains but that decreased mid range performance aswell & never improved the problem. HELP.PLEASE.