easy donne if you can weld,,,all you need is a starter from a car(one without the cone over the shaft)an old golf or polo has one, mount it in a frame starter at the front wheels at the back,try to get a starter with a built in selinoid,if you can get your hands on a steel wheelbarrow rim knock out the center shaft and spot weld on to the staft only spot it on as to much heat will feck the starter ,take your two wires from the starter and fit termanals,take a smaller wire from the selinoid power and fit a push button swicth on the end ,,,stick a battery in an away you go i will try an get pics