250f lost comression

hey my buddy has a 2002 yz250f and he was out riding it the other day and it died and has no compression...he pulled top end off and everything looks fine/...what could it be??

A valve probably isn't sealing against the seat. Did you disassemble the head?

yea its at the dealership now..i just talked to em and they said my intake valves didnt look good...any places to get valves beside my dealer for 275 bucks?

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