I just bought a Dmeonsins Edge Friction drive with the Mitshubishi 43cc engine. I mounted it on a Schwinn hybrid bike and it sure is sweet. I did burn the cluth up after the first 60 miles but it was replaced under warranty with no problem. I can run comfortably at 18 or 20mph with a 1 in a half inch wheel and top out near 30 mph. So far I seem to be the only one around here with one and when people see me pass by they look like what is that. Lots of people ask me questions about it and want to know how to buy one. I have my own cleaning business so I use my motorized bike to travel to the different locations I have contracts with. It is saving me alot on gas and it is a joy to ride. With the way gas prices are getting you woud think more and more people will start riding a motorized bicycle.