Well im new here and lately learned about motorized bicycles. I just bought a 22.8 cc weed eater. i know its not gonna have alot of power but it should have good gas mileage. I have an old one speed bike that i will experiment on, and if i get it going good, i will probably just buy a cheap 50 dollar one that i saw at walmart cause i wont be riding it alot. probably just once or twice a week. I will probably using the friction drive method. well i think thats all i have for now.