The BSA B40 was a series of 350 cc (21 cu in) unit construction single-cylinder OHV four-stroke motorcycles made by the Birmingham Small Arms Company. Developed from the BSA C15, the machines were produced between 1961 and 1967 for civilian use.

The BSA Gold Star is a motorcycle made by BSA from 1938 to 1963. They were 350 cc and 500 cc single-cylinder four-stroke production motorcycles known for being among the fastest bikes of the 1950s.

OUR FIRST ENCOUNTER with the 350cc BSA single cylinder motorcycle was in July of 1963 when we tested the SS-90. The latest was a meeting with the truly charming little Enduro Star; so named...

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2015年6月19日 · Assuming you get past chapter one without abandoning all hope of owning a BSA single, he walks you through how to evaluate the value of the bike and potential costs for repair and restoration.

Simple, reliable, economical and "affordable"; that's how most of the classic bike world view these 350cc, 441cc and 500cc BSA unit singles. But you have to know exactly what's what before you spend your hard-earned cash.

As civilian markets became starved for motorcycles, BSA ramped up production to meet demand. At the time, they were producing only single cylinder models. In 1948, BSA revived the Gold Star name with the B32 in 350cc. These were custom-ordered then built by hand to the customers' specifications & bench tested.

Built from 1938 to 1963 with 350cc and 500cc single-cylinder engines. The BSA Gold Star is a 350cc and 500cc 4-stroke production motorcycle which gained a reputation for being one of the fastest machines of the 1950s and were very popular due to their high performance.

Single cylinder, 3.49 h.p., 72 mm. x 85 mm. bore and stroke (349 c.c.). Double row roller big-end bearings. Engine mainshaft mounted on ball bearings. Steel fly-wheels. New type detachable head, fitted with overhead valves mounted at 90°, and compound valve springs. Inlet and exhaust ports carefully polished.