Ok I had this old go-kart laying around.And I had this old yamaha 250 2 strok.And I made 1 of the fastist wheele standing.I'm talking 1st 2en 3rd 4th gear.But one thing I can't steer.I know your thinking to much power.But even with it not running.The wheels turn but it just go's strate.The kart is 5to6feet long.I don't think it's to short. But it has a live rear axl.So both tire's spin.Can one of you smart guy's can help a dumm one out.THANK'S