Specifications 1956 BSA B33 & B31. Engine: 499cc, OHV, air-cooled 4-stroke single (348cc, B31) Bore & stroke: 85mm x 88mm (71mm x 88mm, B31) Compression ratio: 6.8:1 (6.5:1, B31) Carburettor: Amal, 1-1/16th (1-inch, B31) Maximum power: 23hp @ 5,500rpm (17 @ 5,500rpm) Transmission: 4-speed. Clutch: Wet, multi-plate. Primary drive: Single row ...

2024年4月19日 · The very first motorcycle designed and built entirely by BSA appeared in 1910 – a fairly straightforward 500cc (actually 499cc) side-valve single with an upright cylinder, finished in the green hue that was to become synonymous with the company’s products. The 500 was soon joined by a similar 557cc version, both single-speed belt drive.

2015年8月31日 · The B33, for those of you not so familiar with it, was the big brother to BSA’s post-war B31. The B31 ran 71mm x 88mm engine dimensions while the bigger bore B33 headed toward the nearly-square 85mm x 88mm. The 500cc bike gained a wider rear tyre, heavier flywheels and a larger inlet valve but was otherwise much the same as the 350.

Vehicle history and comps for 1955 BSA B31/B33 500CC Trials Sidecar Outfit - including sale prices, photos, and more.

2011年10月16日 · Among BSA's most popular post-war models was the 'B31' and 'B33' ranges of overhead-valve 'singles', reliable, well-built - like all BSAs - and handling as well, particularly with the swinging-arm frame, as here, as the far more expensive 'Gold Star' from the same company.

1958 BSA B31 500cc. Price: £3 300 ≈ $4275 ≈ €3945. Item location: Kilwinning, North Ayrshire, UK Last update:

2023年10月14日 · A development of the 350cc B31, the 500cc B33 was manufactured from 1947 to 1960. BSA's rugged, workaday B31 was a new introduction for 1945, its overhead-valve engine providing the basis for the renowned Gold Star sports roadster.

Price: £4 395 ≈ $5717 ≈ €5239. In excellent order and fitted with the rare Goldstar mudguard chrome tank sides. large brake hubs. Excellent chrome all over. Stove enamelled frame. Fabulous looking. I feel the B31 is under valued making this a great investment bike. Frame No CB317216. Engine No BB3127899. Reg No 542 UXC.

1959 BSA B31. Nicely restored, usable classic. 399cc · Petrol · 35,971 miles · Manual · 4 speed

2023年10月14日 · 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. 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 ...