Zündapp K 800

The Zündapp K 800 was the largest machine of the shaft-driven K-series that Zündapp began in 1933, and the only one with four cylinders. It used unit construction and a flat-four engine with shaft drive, a layout that Honda adopted for the Gold Wing in 1974, and its four cylinders made it the only machine of that kind used by the German armed forces in the Second World War. The K-series as a whole ran from 200 to 800 cc and was a major commercial success, lifting Zündapp share of the German market from 5 percent in 1931 to 18 percent in 1937. A model list gives the K800 791 cc, a side-valve engine and production from 1933 to 1938, with a military K800-W variant in 1939.