BSA B31 (1949-1959) Specs, Performance & Photos
Maintained by:
Segment: Clasic
Production years: 1949, 1950, 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959
3 Photos
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 22 horsepower at 6000 rpm. It also comes with features such as a telescopic front fork, dual plunger shocks as a rear suspension, a dual seat, a center stand, laced wheels, a large headlight and wide handlebars plus a drum braking system.
BSA B31 1949-1959
BSA B31 348
| engine specs | Type: | air-cooled, four-stroke, single cylinder, OHV | Displacement: | 348 cm3 | Bore X Stroke: | 2.8x3.5 in OR 71 mm | Compression Ratio: | 6.5:1 | Horsepower: | 0/- KW(hp)/RPM | Torque: | 0/- lb-ft/RPM OR 0 Nm/RPM | Fuel System: | - |
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| transmission specs | Gearbox: | 4-speed, manual | Clutch: | multi-plate | Primary Drive: | - | Final Drive: | chain |
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| chassis specs | Frame: | steel | Front Suspension: | telescopic fork | Rear Suspension: | plunger shocks | Front Brake: | drum | Rear Brake: | drum |
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| dimension specs | Overall Length: | - | Overall Width: | - | Seat Height: | - | Wheelbase: | - | Ground Clearance: | - | Weight: | 386 lbs OR 175 kg | Fuel Capacity: | 5 gallons OR 18.9 L |
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| tyres specs | Front: | 3.25 x 19 | Rear: | 3.5 x 19 |
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