BSA B31 Gallery

The B31 was the only new model to be introduced when BSA announced its post-war range in August 1945, although even it had its origins in the earlier B29 and WB30. The overhead valve 350cc single was housed in a rigid frame with a four speed gearbox and telescopic forks and was endowed with good performance for the time. It would continue in this form, largely unaltered until 1949 when the plunger frame was announced.

Bike	Image	Description
1949 BSA B31, 350cc
1949 BSA B31		BSA announced their post war range, consisting of four models, in August 1945, headed by the sporting B31. The new model was derived utilised the M series crankcases endowing it with a "bombproof" bottom end fitted with an over head valve top end. Early models relied on telescopic forks and saddle springs to provide rider comfort and it was not until 1949 when the machine offered was built that the option of a plunger sprung frame became available. Image provided by www.classic-auctions.com.
1950 BSA B31
1951 BSA B31		330cc, OHV Carburetor: TT110 Ignitation: Raser Magnet Lucas
1951 BSA B31		350cc.
1953 BSA B31		350cc.
1954 BSA B31		350cc. The B31 was central to BSA's post war success. The first machines built after the war featured a rigid frame, followed by a plunger option in 1949 and in 1954 a pivoted fork frame. The model found favour with both civilian and service users throughout the world.
1954 BSA B31		BSA was one of the first manufacturers to offer civilian machines following the end of hostilities in 1945 with the overhead valve single cylinder B31 heading the range. Initially offered with a rigid frame, the sprightly single gained the option of a plunger rear frame in 1949. More BSA B31 info..
1954 BSA B31
1954 BSA B31
1954 BSA B31
1954 BSA B31
1954 BSA B31		Image supplied by www.andybuysbikes.com
1955 BSA B31 Rigid
1955 BSA BB31		Single side hubs model.
1955 BSA B31 350 Gold Star Replica
1955 BSA B31, 347cc
1957 BSA B31
1957 BSA B31, 350cc
BSA 1958 B31 Alternator
1959 BSA B31		Swinging arm alternator model.

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