69cc Engine kit!

[StreetLethal]

I saw an ad on Craigslist for a 69cc engine only for sale at $119. Are they really 69cc or just 66cc kits?

 

[MotorBicycleRacing]

I saw an ad on Craigslist for a 69cc engine only for sale at $119. Are they really 69cc or just 66cc kits?

A 66cc is a 38 mm stroke engine.
A 69 cc is a 40 mm stroke engine.
They use the same 47mm diameter piston although
the 40 mm has a lower wrist pin hole location than the 38 mm.