Piston oversize or not

ril0

Seaman
Joined
Aug 23, 2003
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59
Have Yamaha175hp tlry trying to find out what piston i need for it top of piston has marking 64D02 I assume this is part number , P for port side, and a 50 is this oversize by .50 ? non of these marking seem to match with part nos I have found ?
Many thanks in anticipation Ril0
 
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