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Old 01-25-2014, 05:20 PM
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Jumpa Jumpa is offline
Motorized Bicycle Elite Member
Join Date: Aug 2011
Location: Cape Cod
Posts: 606
Default Re: Why are the engines called 66cc/80cc need info

Very true Map different size pistons as well.
Is it the Gurbee that has the piston hole higher than the rest ? I found that out the hard way . Good thing I tested it out before I put any type of torque on the motor. I had my piston bottom out on me on one 66/cc

I had grabbed the wrong piston it was about a inch to high on the center con-rod hole on the piston making the piston bottom out on the crank So no they are not all interchangeable parts. I've even seem completely round cylinders even ..I meant to ask someone on here about that too.

How about the 66cc motors with the 6 mm head bolts , I got one of those in the mail and was not happy

Last edited by Jumpa; 01-25-2014 at 05:23 PM.
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