Thread: Pk80/68.5
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Old 02-06-2011, 04:11 PM
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Default Re: Pk80/68.5

Originally Posted by Goat Herder View Post
I can help on the piston.

As far as motor identification I feel like I am loosing track. The smaller china has a shorter stroke and the bigger china a longer one. The smaller china will rev more the bigger china seams powerful all the way around from what I hear
The 48cc has a 40 mm piston and bore
The 66 cc has a 47 mm piston and bore
therefore they have the same stroke
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