Just purchased my 2004 Cbr600rr about 2months ago, didnt have any problems with it until recently, (when i first got it i tried to keep it below 9k until i got use to it). I have now noticed that once it gets above 10-11k rpms and at about 3/4 throttle bogs down on me not letting me get passed 10-11k.. for your information i purchased this bike with a slip-on two brothers exhaust. It does not have a PCIII, but i was aware that because it is a slip on it should not require one.

Does anyone have any ideas on whats going in?

Already brought it in to the same dealer i purchased to diagnose the problem.

Thanks in advance for the Help :-) !!!!