Bike Power Unit (Apr, 1951)
I don’t know how well this worked, but I love the idea of just tacking an engine onto the side of the wheel.
Bike Power Unit will convert any bicycle into an honest-to-goodness motor bike in 15 minutes. It attaches to the front wheel as shown. Its single-cylinder, three-horsepower air-cooled engine provides 100 miles to a gallon. Fuel tank is at top. American Brake Shoe, Rochester, N. Y.