Need help troubleshooting a problem with my motard. I had an '01 426 that had a trans problem. In fifth it would run out but at upper rpms it would actually pop in and out of gear (broken dogs). I decided to go with an '03 (auto decompression is my favorite thing in the world), got the bike together with my motard suspension and brakes. Ran the engine on a dyno, it sounded good and made one more hp than the modified 426. So, alls good right? Well, running at Jennings GP this past weekend it ran well pulling from low or mid rpms, but had an occasional missfire at upper rpms. Second session got worse. I pulled a plug and it was bright white. So, with help from some friends I bumped up the main from 168 to 170, and also cleaned out some dirt I found in the carb. went back out and it sounded worse. The miss seemed to be accompanied by some mechanical "chunk" sound. So, I rode my GSXR the rest of the weekend and still had a good time.... now, what to do with the YZF? The clutch seemed a little slow on the uptake, so I thought I'd start there... but the next step, as far as I can tell, is a complete tear down? Any suggestions?