what would cause a 02yz250 to be hard to start just rebuilt it and its hard to start but cranks easy but was doing the same thing bein told needs shim

 

what would cause a 02yz250 to be hard to start just rebuilt it and its hard to start but cranks easy but was doing the same thing bein told needs shimed

yz250f

Valve timing , valve clearances .

yz250f

valves

thank it needs shimed runs to good to be out of time. need specs for the valves

thank it needs shimed runs to good to be out of time. need specs for the valves

.10-.15mm intake

.17-.21mm? Exhaust

I might be wrong on the exhaust side I'm going from memory here

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