I would think that Honda 25cc motor would be better off on a BMX bike or even a Dahon as the engine is sure to interfere with the wheel tucked under folding part & suspension system of the Brompton. It would be a major hassle to remove it all the time as the Brompton is designed to be folded all the time. I prefer the Nano Electric motor for the Brompton. Too bad it is not available in North America.
Whichever the case may be, this video series shows how flexible folders are.
Last edited by folder fanatic; 08-19-09 at 10:29 AM.