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http://hydro-carbons.blogspot.com/2012/02/1952-bsa-mc1-racer.html Simply coded MC1, BSA's prototype 250cc racer of the early Fifties bristleswith progressive technical features. Its engine has a near-horizontal single cylinder with twin carburettors and four radial valves operated by two bevel-driven overhead camshafts. The whole machine is low-slung and extremely compact, even with a huge seven-gollon fuel tank. The steering head layout for the leading-link front fork is unconventional and the monoshock rear suspension predated its widespread adoption in racing by 30 years.
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