Restored. 1937 Model U Harley Davidson. Beautiful bike that is near perfect and runs great. 1937 Harley-Davidson Model U was the base for a new U-Series of reliable, flathead V-twin big twins,replacing the older V-Series with a modernized chassis, stronger frame, and dry-sump 74ci (U/UL) or 80ci (UH) engines, featuring Art Deco styling, parallelogram front forks, a 3-speed tank-shift transmission, and a chain final drive, known for its durability, though early models had unique controls like rocker clutches.