Guy,

Sounds like they are great motors. My spitfire motor is a marvel of chinese engineering . If it lasts more than 1,000 miles or so I figure I didn't do too bad. The kit was only $177 to my door though, so I can't complain too much. Gas savings alone should pay for it before too long, and it was a fun little project. Now I am trying to figure how to retrofit a shimano 3-speed nexus hub to get a little better gearing, and to increase top speed. My current drive sprocket is good on hills, but this ability reduces top speed on the flats...

Anyway, how much do the Sachs motors cost? I wonder if there are any suppliers in the US. A motorized bicycle is a great form of transportation. Between my regular commuter bike, a motorized bike, and maybe an electric bike for grins, my wife and I may get rid of one of the cars in the future. No insurance, no licensing, cheap, and you still have mobility when your legs are shot from normal riding.