i hav an 03 yz450, it has about every mod that can be done to one and holy cow is it scary quick !!! i love it but one problem i have found that drive me crazy is the fact if you enter a turn at a pretty steep angle the rear tire wants to slide out on me ! you can even "feel" it when you start to lay the bike over, it gets loose even at a moderate angle, it had a pretty new dunlap d739 on it. please help i'm tired of digging dirt out of helmet. also the suspension is set up a little stiff, but not to bad, could this be the problem ?