I am new to motorized bikes. I have not built one yet, but i am ordering an 80cc kit today. The area I live in is mostly flat with good bike lanes. I have three bikes to start with a 1974 schwinn colligate, a huffy cranbrook and a genesis astra, my first kit will go on the schwinn, just to get my feet wet. The astra is a great bike for the money. It is HUGE. I am 6 foot 240 lbs and this bike is almost to big for me. those 29's are tall and ride like a caddy. I want to learn more about larger engines and jack shafts and sbp speed kits before committing this bike to a full build.