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Need all CRF250 input on valves, top end ect...

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Ok, Lets say I am going to rebuild my bike for next year. I have about 20 hours on it. What should I do?

Valves? new or shim

top end? Rings, piston skirt?

Fork oil change?

For sure grease everything no ?

I am mostly concerned with the valves, What is the fix if any was this a problem at first with the 450's?

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You shouldn't need a rebuild at 20 hours. If you check your valves and they are out of spec, just save yourself the hassle of shimming them and just replace them(you'll have to shim the new ones any way). Do a thourogh grease job and get the shock and fork oil changed. You should be good to go for next season.

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