Re: Frame Size??
When you say a 19" frame are you talking about using a 20" BMX style frame? What bike frame are you using? it would help us to give you answers if we knew a little more about what you are working with. The more information you present us the more accurate the answers can be. I'm not trying to be a wise a$$ just trying to help. I know for a fact that there are a few 20" BMX frames that a motor will fit in; With a little tweaking. I'll post pics of mine soon.
Hope it Helps. I am also a proud member of the 20 MPH. club