When I was a kid, a friend of mine had a two-seat "horseless carriage" that was used in Shriner parades. It had a 2 1/2 or 3 HP horizontal-shaft engine and centrifugal clutch, basically like a go-cart from that era. It had wooden spoke wheeels, too. It looked like a minature Model T. I bet that thing would be worth a fortune today! I remember learning a valuable lesson about magneto ignition from that little engine.