Frame is M20 number WM20-19081, Engine is ZB31 number ZB31-14339. Based on the pre-war B29 BSAs rugged and reliable, the B31 was manufactured from 1945 - 59. It's over-head valve …

Oct 13, 2018 · 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.

Jul 10, 2013 · The polished alloy pushrod tube contrasting against the black iron barrel and head is also satisfying. The engine and gearbox lived up to BSA’s reputation for durability, needing …

1951 BSA B31, 350 cc. Registration number Unregistered. Frame number ZB31 16316. Engine number ZB31 18477. BSA's rugged, workaday B31 was manufactured from 1945 to the end of …

The BSA B31, introduced in 1945, was the first new model introduced by the company after the Second World War. Based on pre-war designs, it used a single cylinder four stroke engine that …

Oct 16, 2005 · 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 …

Jan 13, 2016 · The 1949 BSA B31 has at its heart an air-cooled, four-stroke, 348cc, single cylinder powerhouse mated to a four-speed manual transmission that can produce a claimed …

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BSA ZB31 350cc OHV Rigid 1951. In good usable condition. Starts up and runs well. A nice usable classic!

Feb 8, 2023 · BSA ZB31 350cc 1950 Plunger. In great condition looking to be a recent restoration. Looks very original. The engine sounds excellent as can be heard in the video. Starts very …