i've got an 08 yz 450 i picked up in january. i put an hour meter on it before ever lighting it up and i'm up to 32 some odd hrs. what should i be planning to do here shortly? i haven't bothered to do anything other than oil changes every 3-4 hrs. haven't even checked the valves yet because it still starts easily. when should i check/shim the valves, do the top end, replace the valves? also any info or estimations on the clutch, and suspension service intervals would be killer. if it helps/matters, i ride quite a bit and race (off road A) twice a month. thanks.