I don't disagree with any of the advice provided above. In particular, Rich your technical expertise is very impressive and way over my head...I wouldn't know what to do with the header measurements if I had them! I went riding this afternoon with a couple of friends at the MX track I normally ride and am a member of. The track was just groomed and was perfecty flat. In any event, I had a blast and really focused on what I thought the bike was going to do and tried to exagerate or over compensate with my body positioning and it seemed to work. In short, the bike plain rips and I started to think that maybe I don't want to mellow it out. In particular, there was this one section on the track that had a double, then a double, then a triple, then a table top and then and left hand sweeper that lead to an up hill table top. I nornally can't clear the up hill table top (because the sweeper gets whooped out), but today since it was smooth, I would enter the sweeper and roll it on in 3rd gear until full throttle and I was clearing that table top no problem. I had a huge smile winding out that mutha! Also, in the corners, I was riding almost like a two stroke. I would enter the berm, rev it up and let the clutch out and then take off from there. :laugh: