I have no experience with motorizing a bike or engines in general so I would definitely appreciate suggestions on which engines types are the best and where I could get them. I was looking at some engines on ebay but I don;t know the difference between the different types(stuff like 2 cylinders). I also want to know what types of bikes are best to add an engine. I'm thinking about an 80cc because I heard they go faster. I have about $210 to spend on a bike and engine. Thanks