This motor doesn't need to have high performance upgrades to smoke nearly 2-stroke all-around. With its stock small profile head, speed carb, major bore exhaust, and 80cc crank set up, this engine gets the identical speed as sup'ed up 66cc's- if not more! As a UESCA-certified cycling coach, Rory enjoys https://pietb791wpg3.thechapblog.com/profile