Valve clearance

Hey guys check valve clearance on my buddies 03 yz250f exhaust valves measured .011 and intake measure .008 my question is how do I kno what size shims I need?

Theres a ton of threads on this you should search first but whateve...

measure the shims that are in there and since the clearance is tightening use a thinner/smaller shim.

so if exhaust spec should be 17-22 or whatever it is, and you measure .011 you would use a shim .008 smaller - lets say the shim in that bucket was 185, you'd want to use a 177 to get it into the middle of spec and widen the clearence. Same thing for intake.

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