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Old 04-24-2014, 07:55 PM
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Greg58 Greg58 is offline
Motorized Bicycle Elite Member
Join Date: May 2011
Location: Newnan,Georgia U.S.A.
Posts: 2,620
Default Re: Bought bottom end from Boy Go Fast, should I be worried?

Theon that's what I was saying, the piston with the pin higher in the piston would be for a longer rod/stroke engine. The piston on the left is for the shorter stroke engine, put it in a 40mm stroke engine and it will hit the head. Therefore piston pin height has everything to do with stroke.
Your results may not be the same,Greg

Last edited by Greg58; 04-24-2014 at 08:00 PM.
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