Modified Doodlebug
It definitely started out as a Doodlebug. Front fork is original. Wheels and brake appear to be original. Most of the original frame is there. Someone shortened it. They cut a section out of the top frame bar, bent the lower frame loop that supported the floorboard upward, and eliminated the curved tube that provided clearance for the front fender. They changed the handle bars from the original "longhorn" style. You will find that the handlebar clamp is cast brass. The combination brake/throttle mechanism appears to be intact. Squeezing the brake handle tightens the brake band, letting it back out opens the throttle. The jackshaft with it's cast aluminum pulley has been removed, and the rear support for the engine mounting plate is cut. Probably due to lack of room after it was shortened. It originally had an aluminum "fluid drive" CVT that was also used on gas-powered washing machines. Pretty advanced for 1946. Original engine was a 1.5 hp Briggs Model NP. They move a 250# rider around amazingly well for 1.5 hp. Top speed is about 35 mph.