Harley-Davidson XA
Videos
The Harley-Davidson XA was a flat-twin, shaft drive motorcycle made by Harley-Davidson for the US Army during World War II.
Xa 600
Harley-Davidson XA opposed-twin engine runs 100 °F (38 °C) cooler than a V-twin.
1942 Harley-Davidson XA on display at the California Automobile Museum
Harley-Davidson XA engine
Flat-twin engine
Videos
A flat-twin engine is a two-cylinder internal combustion engine with the cylinders on opposite sides of the crankshaft. The most common type of flat-twin engine is the boxer-twin engine, where both pi
Harley-Davidson XA
…Harley-Davidson XA Manufacturer Harley-Davidson Production 1942 Assembly Milwaukee, Wisconsin, USA Class Military motorcycle Engine 45 cu in (740 cc) SV flat-twin Bore / stroke 3.063 in × 3.063 in (77.8 mm × 77.8 mm) Compression ratio 5.7:1 Top speed 65 mph (105 km/h) Power 23 hp (17 kW) @ 4,600 rpm Ignition type…
Douglas 80 Plus motorcycle engine (circa 1950)
Citroën 2CV engine (viewed from rear)
1912 Douglas N3 engine
1942 Harley-Davidson XA engine