BMW R20 – year 1937
Manufacturer: Bayerische Motoren Werke AG, Munich, Germany
BMW's production program was very extensive. Tourist vehicles were manufactured here, sports and racing, with engines with capacities from 200 cm3 do 750 cm3 (the latter were equipped with compressors).
In addition to models with the characteristic two-cylinder boxer engines, the company also produced motorcycles with single-cylinder engines. The smallest of them was marked with the symbol R. 20. The light one, a nice motorcycle was made in the company's design studios, as a result of experience gained from the operation of larger models and the results of intensive prototype trials. It was equipped with a single cylinder, four-stroke engine with a capacity 190 cm3 and power 5,9 kW (8 KM) with aluminum alloy flat piston. Circulating lubrication of the engine was provided by a gear pump. The fuel-air mixture was created in the carburetor of the well-known Amal brand, equipped with a large, effective air filter. The engine had a single-plate dry clutch, a foot starter and was interlocked with a three-speed gearbox, foot-operated. The drive from the gearbox to the rear wheel transmitted a shaft with articulated joints, placed in a tubular sheath. The main gear - bevel gear was equipped with helical gear wheels. The closed double tubular steel frame had a sprung front telescopic fork. The brake drums on the front and rear wheels attracted attention with their large dimensions. Electric equipment: battery ignition system and lighting installation, including headlamp with speedometer and odometer, were from Bosch. Great capacity fuel tank 12 liters allowed driving at a distance of almost 500 km. A motorcycle with a curb weight 130 kg was developing maximum speed 90 km/h. In total, in the years 1936-1938 approx 5000 pieces of this vehicle.