A handcrafted motorcycle which has an oil-cooled OHC four-cylinder engine with a novel two-speed transmission using two different transmissions per chain to the rear wheel. The second of only two built is on exhibition at the Sammy Miller Museum. It was constructed by John Haythorn, a Scottish automotive engineer who worked for a supercharger manufacturer. Its development ended when he was transferred to support the war effort in 1940, but it was already a usable machine that had been presented to the motorcycling press.
Haythorn also built the engine for the Sackville
Source: Sergio Scalerandi
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