So I've got a 12hp briggs and stratton engine that came out of an old lawnmower. I took it to an old lawnmower repairman once and he said he could make the mower do 40+ mph. So, I wanted to build a small Kart for me and daughter to ride around in. I went to college for welding and metal fabrication so the frame shouldn't be a problem. Just wondered if anyone had any experience with building one. Steering, suspension, brakes, and controls would be my weak points.