Hey, Ken, Your bike is really NICE!! I'm getting ready to build my second motorized bicycle but, since the law says you can't have more than 1HP, I'm going to build a pusher trailer. I'm considering 2 approaches to this. Copy Motorman's setup or, I have a stretched bike frame that I could use to have 7 speeds. I'd like to see some pics of your bike from the right side, showing your jackshaft/gear setup.