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Old 02-19-2012, 05:43 PM   #1 (permalink)
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Piston sizes to bore etc how to

I have been asked a lot how to figure out what is needed when a piston is replaced as to which size they need :

Good rule of thumb is ....

so if old piston is 75.5mm
old bore hole was 76mm

bore the hole to 10 thousandths over =.25mm
new bore hole - 76.25
so... new piston 76.00
new rings .25

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