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Old 06-25-2013, 09:58 PM
surferscha surferscha is offline
Motorized Bicycle Newbie
Join Date: Jun 2013
Location: florida
Posts: 2
Default Identifying an engine

I recently swapped out a motor on my friends motorized bike because his motor needs a top end (cylinder, piston and rings). I want to rebuild the engine but my friend does not know whether it is a 49 cc or 68 cc. Is thier any way to tell by measureing the bore or whatever? Or are the cylinder and piston kits interchangeable for the 49 cc and 68 cc?
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