Get the largest selection of aftermarket Harley Sportster parts. Viewed as one of the most overlooked Harley-Davidson models, Harley Sportster parts and accessories can be challenging to find. With the largest warehouse of aftermarket parts, J&P Cycles offers more than 25,000 parts and accessories for your Harley Sportster. The Harley-Davidson Model W, also known as the Sport Twin, is a motorcycle made by Harley-Davidson from 1919 to 1923. Unusually for a Harley-Davidson motorcycle, the Model W had a flat-twin engine and a trailing link fork. 1920 Harley-Davidson. Country: United States Engine: Air-cooled V-twin overhead valve 4-stroke Ignition: Bosch magneto Displacement: 999cc Valves: Overhead, pushrod activated. Four valves per cylinder Fuel system: Schebler carburetor Transmission: Single speed direct drive, no clutch Suspension: Front spring fork with a Hartford damper, rigid rear Brakes: None Disclaimer www.earlyharley.com is not an authorized agent or in anyway associated with Harley-Davidson, Inc. The words Harley-Davidson and all hd and oem part numbers, model names, designations, and illustrations are used for referance only.