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whats this sound

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yeah our 93 cr125 does the same thing, and i know for a fact that the piston/ring to cylinder tolerances are correct. just had them checked. what the heck is it!!!!

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There are no bearings in the power valve.. Take off the cover and check it out anyways though! Your idle seems kinda high & the cables might need adjustment...

It's either that or most likely piston ring gap as stated above..

Remove the head pipe to feel the powervalves for adjustment and look at the piston skirt with a flashlight for clues of what's going on..

If it still makes noise I would drain coolant, pull head and check ring gap.

Edited by Chill_MotoX

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