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Lot 431: BSA B33

Grand Palais Sale, Bonhams (7 February 2013)

A development of the 350cc B31, the 500cc B33 was manufactured from 1947 to 1960. The engine closely followed B31 lines but with larger (85mm) bore and heavier flywheels. Cycle parts were identical apart from a larger-section rear tyre. Produced initially with rigid frame and telescopic forks, the B33 was available from 1949 with optional plunger rear suspension and switched to a swinging-arm frame, along with the rest of the range, in 1954. A good all-round performer by the standards of its day, the B33 could top 80mph (129km/h), cruise comfortably all day at 70mph (113km/h) and return in excess of 70 miles per gallon (4 litres/100km). Dating from circa 1956, this tidy example has the Ariel full-width alloy hubs fitted by BSA at that time. There is no registration with this Lot.

Lot Details
Auction Grand Palais Sale
Bonhams, Paris, France
Lot Number431
Outcome SOLD
Hammer Price€2200
Hammer Price (inc premium)€2530
Condition rating
Registration number
Chassis numberEB31 4234
Engine numberBB33 8018
Engine capacity (cc)499
Engine - cylinders
Number of doors