The German made Zundapp motors of 1934 was a real surprise package. The Zundapp K800 motorcycle was a horizontally opposed four-cylinder engine with shaft drive. The engine case enclosed the crankshaft, contact breaker, ignition coil, carburettor and dynamo. The removable cylinder heads were cast in aluminium. The motorcycle featured a tachometer as well as an anti-theft device. More specs and user manual of Zundapp K 800 you can see in next overview.
Test drive a motorcycle Zündapp K800 1939: