Well, I went to the Florida Flywheelers again and of course, I had the bug to build something when I got back. So I'm working on a trike this time. I took the 3HP Briggs from my bike and I mounted it on the back and I'm using a transmission from a self-propelled mower to help with gear reduction. It has a 5:1, I'm looking at I think 12:1 from it to the wheel, but I could be wrong; it's a 1.75" pulley to a 12" pulley. I don't have the big one yet, but I'll be getting it later and the nice thing is the wheel has four holes in the hub that I can bolt it to. For going from the engine to the transmission, I'm thinking just go with a belt drive of maybe 1:1 or 1:2 with a slip clutch, but I'm not too sure on it yet. I'm also thinking of using a pair of pillow block bearings to mount the transmission, but I'm having a problem finding any that are that small, so I'm not too sure what I'm going to do if I can't. I don't want this to go fast, I'm gonna use it whenever I go to a swap meet and tow a small trailer with a seat and a place to put anything I buy.