BMW R11

The BMW R 11 was the first touring motorcycle in the 750 cc class that BMW built with a pressed-steel frame in duplex form, in the vein of the Neander motorcycle of Ernst Neumann-Neander. About 7,500 were produced between 1930 and 1934. BMW presented the R 11 and the R 16, its first motorcycles with pressed steel frames, at the London Olympic Show in November 1928, and deliveries began in Germany in the summer of 1930. The longitudinally mounted M 56 engine was a four-stroke two-cylinder valve-in-block boxer with grey iron cylinders, removable aluminium heads and an in-house BMW carburettor, and a shaft drive ran to the unsprung rear wheel. The Series 3 of 1932 changed the carburettor, and from the Series 5 of 1934 twin Amal carburettors gave a continuous output of 20 hp.