Foundry Motorcycle » BMW R75 Brat Tracker

The BMW R75 is a World War II-era motorcycle and sidecar combo made by the German company BMW.

Inside the 1930s BMW were producing a quantity of popular and impressive motorcycles. In 1938 development of the R75 started in response to a request from the German Military.

Preproduction models of the R75 were driven by way of a 750 cc part valve engine, that was predicated on the R71 engine. However it was quickly found essential to design an all-new OHV 750 cc engine motor for the R75 device. This OHV engine motor later proved to be the foundation for succeeding post-war twin BMW engines like the R51/3, R67 and R68.

The third side-car wheel was powered with an axle linked to the trunk wheel of the motorcycle. These were installed with a locking differential and selectable street and off-road equipment ratios through which all four and change gears proved helpful. This made the R75 highly manoeuvrable and capable of negotiating most surfaces. A few other motorcycle manufactures, like FN and Norton, provided an optional drive to sidecars.

The BMW R75 and its own competitor the Z?ndapp KS 750 were both greatly employed by the Wehrmacht in Russia and North Africa, though over time of analysis it became clear that the Z?ndapp was the superior machine. In August 1942 Z?ndapp and BMW, on the urging of the Army, agreed upon standardization of parts for both machines, with a view of eventually making a Z?ndapp-BMW hybrid (designated the BW 43), when a BMW 286/1 side-car would be grafted onto a Z?ndapp KS 750 motorcycle. They also decided that the produce of the R75 would stop once production come to 20,200 systems, and after that point BMW and Z?ndapp would only produce the Z?ndapp-BMW machine, manufacturing 20,000 every year.

Since the goal of 20,200 BMW R75's had not been reached, it remained in production before Eisenach manufacturing plant was so terribly destroyed by Allied bombing that development ceased in 1944. An additional 98 systems were assembled by the Soviets in 1946 as reparations.

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