Ok here's the 411. My bike runs fine in 1st and 2nd. then i hit 3rd and it runs fine too, until...you get into the higher rpms. then it just boggs down. i tried 4th too, and it did the same. but 2nd and 1st are fine. the plug is a perfect tan color. i'm running a #135 main jet, #42 pilot, and my air/fuel mixture screw is 3/8 out. It runs fine in the bottom. It's just above 2nd the higher rpms just bogg down. it's warmed up great. there IS fuel in the tank., Could my powervalve be gummed up? But wouldn't that only affect the lower rpms? That's all i can really think of. It's messed i know, but what coult it be?