Hi, back in 1984 when I was about 13 I mounted a friction drive motor to my bmx style bike. That was really cool. Then just a couple of weeks ago a guy rode by me with a motor on his bike. I didn't even know bike engines were around anymore. So I found to my delight that the kits are cheap and look pretty easy to install. I'm going to be ordering one of the Chinese kits pretty soon and can't wait to try it out here in the Denver area..