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BSA · 1971

1971 BSA B50SS

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1971 BSA B50SS
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Specifications

Category
Sport
Displacement
499.0 ccm (30.45 cubic inches)
Power
33.5 HP (24.5 kW) @ 6200 RPM
Torque
37.9 Nm (3.9 kgf-m or 28.0 ft.lbs) @ 5000 RPM
Top speed
136.8 km/h (85.0 mph)

The 1971 BSA B50SS

1971 BSA B50SS sat at the sporting end of BSA's single-cylinder thumper range, built for riders who wanted something lighter and more focused than the twins in the catalog. This is a big-bore four-stroke single in the classic British tradition, the kind of bike that rewards a rider who knows how to work a kickstart and doesn't mind a bit of vibration in exchange for genuine torque off the bottom. It's happiest on back roads and green lanes rather than motorway slogs, with the sort of narrow, flickable chassis that makes it feel more alive than its numbers suggest. Ownership means staying on top of basic maintenance rather than expecting modern reliability. The 1971 model carried over without significant mechanical changes from the prior year — buyers comparing it to a 1970 example should focus on mileage, service history, and condition rather than spec differences. Today the 1971 BSA B50SS attracts restorers and classic British single enthusiasts, often riders downsizing from larger vintage twins who want something simpler to wrench on, plus a smaller collector segment drawn to BSA's final years before the marque's decline.

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