NSU 501 OSL 1937 500cc 1 cyl ohv                                             sold

    NSU 501 OSL 1937 500cc 1 cyl ohv

    Manufacturer: NSU
    Model: 501 OSL
    Year: 1937
    Displacement: 494cc
    Engine type: 4-stroke / ohv
    Cylinders: 1
    Power: 22hp@5150rpm
    Bore/stroke: 80x99mm

    Frame number: K1129
    Engine number: ED1373

    Yet another motorcycle manufacturer with its roots in the bicycle industry, NSU built its first powered two-wheeler in 1900. Proprietary engines were used initially, but within a few years NSU was making its own power units and was one of the first manufacturers to fit two-speed transmission. The marque established a strong presence in the UK market, ranking second only to Indian among imported makes prior to WWI. NSU recommenced motorcycle manufacture at the end of The Great War and rapidly returned to full production. In 1929 the German firm succeeded in recruiting designer Walter Moore from Norton. Moore had been responsible for Norton's first successful overhead-camshaft-engined machine, the CS1, so it came as no surprise when distinctly Norton-esque 'cammy' NSU Super Sport models appeared a short time later. In 1932 NSU introduced the Moore-designed 'O' series of overhead-valve singles, which would form the mainstay of production in the mid-1930s. However, it was not for his contribution to the design of its medium and large-capacity four-strokes that NSU had most reason to thank Moore, but for his 98cc two-stroke ultra-lightweight Quick, almost a quarter of a million of which were manufactured between 1936 and 1953.

    The engine of this complete NSU 501 OSL runs and is a rewarding and project.

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