Description
1937 BSA 500CC M22 OHV SPORTS REGISTRATION NO. NOT REGISTERED FRAME NO. HM19 5200 ENGINE NO. HM22.1364. BSA's single-cylinder range was re-designed 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...