The guy selling it to may claimed it was
On 2nd thought,,, since it was only 75 dollars for the bike, I did not question that too hard... I looked at it again, but I can niether confirm or deny that claim. This is one of those deals that the guy who sold it to said the guy that sold it to him says it was a 70 cc piston. I will have to pull the head and take some measurements.
Looks very stocky to me .....
Trust but verify.