The KS 750 was manufactured form 1941 to 1948, with more than 18000 units being produced. The bike had a V-Twin cylinder, 750cc engine. It was known as "the elephant of war", just as the K601 was nick-named "the green elephant".
Manufactured from 1934 to 1939, the KS500 had an engine with 496cc and 22 HP.
The first Zundapp bike was manufactured in 1921, but the company only found real success in 1933, when the K-series hit the road. The K 800 was manufactured from 1933 to 1938, only 550 units being released.