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Old 06-02-2010, 03:37 PM
Bikeguy Joe Bikeguy Joe is offline
Godfather of Motorized Bicycles
Join Date: Jan 2008
Location: up north now
Posts: 11,531
Default Re: before i make a mistake

I use PC-7 (epoxy putty) to fill that kind of gap. Wrap the tube with saran wrap, then mix the putty, mount the engine, but don't fully tighten it, just get it snug enough that the putty starts to squeeze out. Let it harden, then tighten the rest of the way.
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