I need some ideas on what might be happening with my bike. I just did a full rebuild with a 13.7:1 je piston and I am running vp110 with a 180 main and moved the jet needle clip down one position. The mid range runs like a raped ape, but at 10,000 rpm the bike hesitates and its almost like valve float or ignition problem? It will not reach the limiter and has nearly caused me to wreck multiple times. Please suggestions or anyone who has experienced the same problem! thanks brett oh, and i thought the cam sprocket had spun but just rechecked timing last nigh and it was ok.. so now i'm stumped on what could cause this.