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Sunbeam S7 Deluxe (1953)

The Sunbeam S7 was designated as the “Machine of the Future” following World War ll. Built in BSA’s Small Heath Works in Birmingham from 1948 to 1956, the S7 was designed by Erling Poppe as an exercise in adopting automobile theory to motorcycle design. The Sunbeam S7 was a unique departure from post-war motorcycle architecture with its inline, twin cylinder, overhead cam, dry clutch, shaft-drive and rubber mounted engine. The engine is a 487cc in-line, air-cooled twin, with all-alloy construction, right-side shift and coil/distributor ignition. Power is transferred through a car-type final drive shaft and through a right angle to the back wheel. The heart of the bike’s charm is its engine.

This S7 Deluxe was bought new in England by Jody Weisel’s father and flown home in the back of a four-engined U.S. Air Force KC97. The machine has 13,263 miles and is in original un-restored condition.

Images are property of The Early Years of Motocross Museum, ®2006