With the banning of superchargers BMW's horizontally opposed twin cylinder engine struggled to make an impact in solo road racing, although it would meet with considerable success in long distance, endurance based events. However, the design characteristics that hampered its employment in solo competition proved to be an advantage when installed in a combination, particularly so with the appearance of the "kneeler" style chassis. The horizontal cylinders ensured good cooling for the engine and also contributed to keeping the overall height of the engine to a minimum. This enabled the power unit to be mounted in the lowest possible position, to the benefit of the centre of gravity and when employed in a kneeler chassis, ensured that the machines overall height was kept to a minimum. The shaft drive and bevel gear final drive box could deal reliably with the engines high torque output, enabling it to be exploited to the full by the driver, whilst the handling quirks that afflicted solo shaft driven machines were negated by the third wheel.
From 1954 to 1974 BMW powered combinations secured the World Championship 19 times. A consequence of this success at the highest level was that BMW powered outfits began to appear in national and club level races. Powered by the reliable overhead valve road engines instead of the exotic twin overhead cam units employed by the factory supported riders at international level. This example of an overhead valve powered machine benefits from a Rennsport transmission and is housed in a chassis that reflects the designs of those built by Dieter Busch. It is attractively presented in white and black.
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