Well it started with my buddy asking me to fix his old rupp mini bike.It was to far gone to fix so i got this idea to put it in a bicycle. I had such a good time doing it i made another one for myself. The first one is a 3 1/2 briggs motor and goes 41 miles a hour . The second one i had to build from scratch has a 5 horse briggs and goes 54 miles an hour. I just cant belive the reliability . we goof around at night in the summer and tool around the back roads. please send me comments and tell me what you think .