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 With a 211-mph speed, the Delphin III was the first bike to cross the   200-mph threshold. It was part of a concentrated onslaught on Bonneville   by the German manufacturer, which was fixed on taking a number of land   speed records. Driven by Wilhelm Hertz in 1956, this 500cc German bike   featured an experimental, three-lobe Wankel supercharger rotary device   that helped to inspire the Wankel engine. Looking more like a fish out   of water, than a motor bike, NSU reduced drag by redesigning the shape   of the streamliner to give it its distinctive aerodynamic look. 
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