Thread: Motor size
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Old 12-29-2009, 08:10 AM
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wes wes is offline
Motorized Bicycle Elite Member
Join Date: Aug 2009
Location: Tucson Az
Posts: 207
Default Re: Motor size

49cc has 6mm head studs and the 67cc has 8mm head studs, once you see a few you will see the difference in cylinder size and by the way the cooling fins look as well as the ports on the side of the cylinder wall
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