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It was the only postwar West German model without rear suspension. The R 24 was reverse-engineered from the pre-war BMW R 23 motorcycle with several improvements and powered by a 247 cc (15 cu in) single-cylinder engine. The first post-war BMW motorcycle in Western Germany, was the 1948 BMW R 24. There were no plans, blueprints, or schematic drawings because they were all in Eisenach. In 1947, when BMW received permission to restart motorcycle production from US authorities in Bavaria, : 76 BMW had to start from scratch. Initially, the terms of Germany's surrender forbade BMW from manufacturing motorcycles. In West Germany, many of BMWs facilities had been badly damaged during the war, including the Munich factory which was in ruins. Instead of BMW's blue-and-white roundel, EMW used a very similar red-and-white roundel as its logo. Eventually in 1952, after the Soviets ceded control of the plant to the East German Government, and following a trademark lawsuit, the East German company was renamed Eisenacher Motorenwerk (EMW). The head office of BMW, based in Munich, had no control over the operations in East Germany. The factory continued to use the BMW name, causing two separate companies (one in Eisenach and the other in Munich, West Germany) to be using the BMW name between 19. In Soviet-controlled East Germany, BMW's sole motorcycle plant in Eisenach recommenced production of R35 and R75 motorcycles soon after the war, for reparations. It was either licensed to the Soviet Union in 1938 or just copied there, resulting in the Dnepr M-72 (produced from 1942 to 1960) and IMZ-Ural (modernised version still in production) motorbikes. Original bikes are now rare and highly sought after. Unfortunately only 2638 motorcycles could be built before production was disrupted due to the War.
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It was the Icon of BMW, expensive to build and well engineered. The BMW R 71 746 cc (45.5 cu in)big flat-twin motorcycle was exceptional. In 1937, Ernst Henne recorded a top speed of 279.5 km/h (173.7 mph) on a BMW 500 Kompressor racing motorcycle, setting a world record that stood for 14 years. The BMW R 12 and BMW R 17, both introduced in 1935, were the first production motorcycles with hydraulically damped telescopic forks. : 58 The lineage of single-cylinder motorcycles continued with the 400 cc (24.4 cu in) BMW R 4 in 1932 and the 300 cc (18.3 cu in) BMW R 3 in 1936. It used a 200 cc (12.2 cu in) engine and could therefore be ridden in Germany without a motorcycle licence at that time. The next single-cylinder motorcycle was the BMW R 2, which was released in 1931. It was not successful and was discontinued in 1927. The first single-cylinder BMW motorcycle was the 1925 BMW R 39, which was BMW's smallest model and used a 250 cc (15.3 cu in) engine. It was based on the R 32 and used an overhead valve engine producing 12 kW (16 hp). The BMW R 37, produced from 1925 to 1926, was BMW's first sporting model. The R 32 also started the tradition of shaft drive, which was used on all BMW motorcycles until 1994. At a time when many motorcycle manufacturers used total-loss oiling systems, the new BMW engine featured a recirculating wet sump oiling system with a drip feed to roller bearings a design which BMW used until 1969. This engine with 6.3 kW (8.5 hp), resulting in a top speed of 95 to 100 km/h (59 to 62 mph). Released in 1923, the BMW R 32 used a 486 cc (29.7 cu in) flat-twin petrol engine, which was longitudinally-mounted to eliminate the cooling problems of the transversely mounted engine in the Helios. : 14–17 īMW merged with Bayerische Flugzeugwerke in 1922, and the BFw Helios became the starting point for the first BMW motorcycle.
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Despite being designed as a portable industrial engine, the M2B15 was also used by several motorcycle manufacturers, including for the 1920–1923 Victoria KR1 and the 1920–1922 Bayerische Flugzeugwerke (BFw) Helios motorcycles. In 1920, BMW M2B15 flat-twin petrol engine was released. To remain in business, the company began producing small industrial engines (along with farm equipment, household items and railway brakes). At the end of World War I, the Treaty of Versailles demanded that BMW cease production of aircraft engines.