hey guy's. i'm thinking about purchasing a new 2011 YZ450F very soon. a Yammie dealer in my town has 1 and has given me a price that seems really reasonable. i currently ride an 09' YZ450F. what should i expect as for riding characteristics with the newer machine? i read about some experiencing stalling, front end seems light...i think i can deal with those by adjustments on fork height and riding /habits but what are the real differences? thx in advance!