2001 yz 80 topend

Joined
Nov 22, 2000
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#1
How often should you check your topend/replace it, I've put about 20 hours on it, And how do you know when its fading. Also if I'm supposed to replace anything could you help explain how, its my firt time doing anything major to a bike, so I don't really know what to do! Thank you

Ben