I'm having an issue with the bike running clean in the upper RPM's. It runs fantastic everywhere exept about 3/4 throttle, and then it has a total flat spot/bog-like the motor completely cuts out for an instant and then it gets past that and it's fine. It either does that or it will get to that 3/4 throttle(aprox) and it will sound like it hits the rev limiter-kind of that misfiring sound. We're only about 600 ft. elevation, and it has an FMF pipe with the stock header. I did a search, and haven't looked at the jets I have in, but the guy I bought it from said he had it richened up a bit. The bike is almost brand new with around 20 hrs. at the most. He said he had the valves checked before he sold it to me, and it only needed slight adjustment which he had done. The bike starts super easy. I disconnected the TPS and I didn't notice any difference at all. Does this sound like I need to go richer-maybe richen the clip position? Or.... Anyone willing to help me out will be much appreciated. Thank you.