80CC upgrade piston and cylinder.

Greg58

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May 1, 2011
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Has anyone Though about building a 80cc engine from a 40mm stroke engine? I saw a piston cylinder and rings with gaskets on ebay, 50mm bore that BGF says will work with a standard 66-69 cc head. If I had a 40mm stroke engine I would give it a try.
 
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Testname111

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May 20, 2021
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I know I built a 70cc from this Athena cylinder kit with a spacer from smolik performance :)


Spacer 40mm or 38mm

My build


Butttt my build 70cc where did u find the 50mm bore can u give me a model name and link please
 

Greg58

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May 1, 2011
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My 66cc engine has 38mm stroke, the kit is for 40mm stroke engines, this may be a better way to get a 50mm bore engine to perform. With the heads available and the ability to adjust squish this shows promise.
 
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Tyler6357

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Mar 15, 2012
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