Re: Why are the engines called 66cc/80cc need info
That May be the '70 cc' motor with a 45mm piston.
The One with the odd ball piston is the one to really stay away from (GT5?).
If your looking for a motor, try and find 40mm stroke x 47 mm bore.
Last edited by Theon; 01-26-2014 at 10:27 PM.