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BSA Motorcycles

BSA M23 Empire Star 500cc OHV 1937

BSA-1937-M23-500cc-Empire-Star-CMAT-01.jpg
Model: M23 Empire Star
Year: 1937
Displacement: 500 cc
Engine type: 4-stroke ohv single
Bore / Stroke: 82 x 94 mm
Frame number: HM19609
Engine number: JM23834

During the 1930s BSA concentrated on producing a range of dependable, well-made, competitively priced motorcycles.

The BSA single-cylinder range was redesigned by Val Page for 1937, the engines taking on many of the characteristics they would retain in the post-war era, most notably dry-sump lubrication, rear-mounted magneto and a distinctively shaped timing cover. There were two new overhead-valve offerings in the 500 class: the M22 Sports and M23 Empire Star. Their new engines were housed in a conventional chassis and drove via four-speed gearboxes, both of which benefited from the convenience of foot change.

This example of the Empire Star is equipped with a Smiths speedometer, ammeter, complete Lucas lighting set and Amal carburretor. The two-port head and the high level exhausts are special equipment not usually found on this model.

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