Yeah, I know they're not really 80cc. I got my kit last week from Powerking, and mounted it on a Giant mountain bike....and so far, I love it. Some of the nuts/parts are pretty lightweight, and one was not threaded, but overall easy to install. Took 3 hours. Kit should come with zip ties! I just got back from a 70 mile test ride through the hills of Wine Country. Grades were steep between Pope Valley and Angwin, so I had to peddle a couple of times, but not so hard as to break a sweat. I love my motorized bicycle and ride it every day. My friends all love it so much I am building 5 more this week.