cc's have little to do with mph. i have a highly modifyed atc 70 that i had going over 55 mph. i also had a stock 350X 3wheeler with different gearing and 25 inch tires and made it to 107 mph. i was young and dumb whin i did the 350X thing. we just wanted to see what would happen with this set up. god was watching out for me that day because the tires were not made to go over 60 mph.
