With all due respect, that is the dumbest statement i have ever read Lean is lean, and yes, it will hurt parts, usually cut the tulips off a valve in the 4Ts. Ahh, no you didn't. Try to keep the trashy insults to a minimum if you can. Also it would help you to know who your insulting when you finally decide to do so, as Grayracer is just about one of the most knowledgebale guys in these forums, now back to the topic at hand, the 2010 YZs, they look greaT!! The end.