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Lot 362: 1946 BSA 348cc B31

Collectors' Motorcycles, Bonhams (16 October 2005)

Based on the pre-war B29, BSA’s rugged B31 was manufactured from 1945 to 1959, its overhead-valve engine providing the basis for the renowned Gold Star. Produced initially with rigid frame and telescopic front fork, it gained (optional) plunger rear suspension in 1949 and a swinging-arm frame in ‘54. A good all-round performer by the standards of its day, the B31 could cruise comfortably all day at 60mph while returning 75mpg-plus. Offered for restoration, this incomplete example comes with old-style Swansea V5 registration document. It should be noted that the illustrated registration mark ‘MYT 693’ has been taken off the machine.

Lot Details
Auction Collectors' Motorcycles
Bonhams, Classic & Motorcycle Mechanics Show, Stafford
TypeMotorcycle
Lot Number362
Estimate£400-£700
Outcome SOLD
Hammer Price£700
Hammer Price (inc premium)£805
Year1946
Condition rating
Registration number
Mileage-
Chassis number
Engine number
Engine capacity (cc)
Engine - cylinders
Number of doors