This handsome Empire Star is equipped with a Smiths speedo, Ammeter, complete Lucas lighting set and Amal carburetor. Special equipment is the Two-Port Exhaust and the high level exhausts.
This machine runs powerful and smooth.During the 1930s BSA concentrated on producing a range of dependable, well-made, competitively priced motorcycles.
The firm’s 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 that 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 conventional cycle parts and drove via four-speed gearboxes, both of which benefited from the convenience of foot change.Displacement: 500 cc.Cylinder: 1.Engine type: 4-stroke / ohv.Bore / Stroke: 82 x 94 mm.