This rigid BSA is in great shape. The restorer has done his job well. BSA’s rugged, workaday B31 was manufactured from 1945 to the end of 1959, its overhead-valve engine providing the basis for the renowned Gold Star sports roadster.
source.image: classic-motorcycle.com
At the time of its introduction, the B31 was BSA’s sole all-new model, joining the lightweight ‘C’ and heavyweight ‘M’ ranges carried over from pre-war days, and was produced initially with rigid frame and telescopic front fork.
In January 1946 it was joined by a Competition variant, the B32, which boasted a high-level exhaust system, 21″ front wheel, additional chromium plating, a crankcase shield and lowered gearing.
Advertisement
An alloy cylinder barrel and head, broadly similar to those used on the contemporary Gold Star but retaining a separate pushrod tunnel, became available as B32 options from 1949 onwards, as did plunger rear suspension in common with the rest of the ‘B’ singles range.
