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Mt buddys '02 CRF 450 is running bad. (Has stock engine/exhaust.) When the bike gets hot it is stalling a lot, and it is a bitch to start. The bike stalls a lot when hitting ruts/bumps/roots. When he re-starts, it likes to stall if he gives it any throttle.
The bike probably has 150 hours of trail riding on it. He pulled the carburetor, everything looks fine. He checked the valves, said they were within spec but 1 thou on the tight side of things.
What should he check next?
We are supposed to ride the Hatfield McCoy trails this weekend, so this is sorta fucking things up.
Thanks, Todd