Her is the rundown. Got my track bike with 3300 miles and bone stock but it had a slip on. It had a flat spot about 7500-8500 rpm range. It wasn't a miss, but more of a bog. I bought a PCIII and had it dyno tuned at Pegrams. The guy said the III only works the lower injectors and doesn't help with the top end rpm range. He tunes it the best he could and it has done okay so far. The last few track days a miss, not a bog, has been developing at 10,500 rpm. It was getting bad Monday. It was fine up to that range and then after maybe 11500 it took off like a scalded dog to the redline. I run pump fuel 93 octane and I haven't changed the plugs. It has around 6000 miles on it now. I threw a gallon of 100 octane in there to see what it did just for the hell of it and it got horrible. I was launching out of corners past people and losing the pass because it was spitting so bad. I'm going to clean the fuel filter in the pump and I was thinking about other things that may cause this. My first idea was to get a new fuel management system that auto tunes all 8 injectors but that's gonna be 5 bills and I want to troubleshoot before I drop the coin. Any suggestions on what to do or where to start?