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Post by leaddiet on Jun 18, 2012 9:20:28 GMT -5
Hello all,
Ive got a 02 pw50 and Im doing a top end rebuild. Anyone know the yamaha spec for piston to wall clearance? im using a yamaha piston .010 over. Thanks in advance.
Scott
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Post by hotvw882 on Jun 21, 2012 11:26:11 GMT -5
im looking for same info , any reason why you didnt go stock size on the piston
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Post by kshields72 on Jun 21, 2012 14:01:11 GMT -5
Standard piston clearance is 0.034 - 0.047 mm (0.0013 - 0.0018 in) and ring end gap should be 0.15 - 0.35 mm (0.006 - 0.014 in) in case you were curious about that.
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Post by leaddiet on Nov 6, 2012 9:56:11 GMT -5
Thanks for the replies! I had to go .010 over because it scuffed the piston on the exhaust side. Dont suppose if anyone knows if the cylinder is platted? I dont believe so but I fiqured Id ask.
Thanks again!
Scott
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Post by sullymoto on Jan 11, 2014 13:09:05 GMT -5
pretty sure the pw cylinders are not plated. I'm doing the same rebuild with a 41.5mm piston and trying to find the correct clearance to cylinder wall
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