BSA B50 MX
| Manufacturer | BSA |
|---|---|
| Production | 1971 |
| Class | Enduro |
| Engine | air-cooled, four-stroke, single cylinder, OHV |
| Bore / Stroke | 83.8mm x 83.8mm |
| Compression ratio | 10.0:1 |
| Horse Power | 34.06 HP (25.4 KW) @ 6200RPM |
| Torque | 28.03 ft/lbs (38.0 Nm) @ 5000RPM |
| Transmission | Gear box: 4-speed, manual Final Drive: chain |
| Suspension | Front: telescopic fork Rear: dual shocks |
| Brakes | Front: drum Rear: drum |
| Front Tire | 3.25 x 18 |
| Rear Tire | 3.5 x 18 |
| Wheelbase | 54.02 inches (1372 mm) |
| Dimensions | L 85.0 inches (2159 mm) W 29.02 inches (737 mm) |
| Seat height | 32.01 inches (813 mm) |
| Weight | (dry), 140.0 kg (wet) |
| Manuals | Service Manual |
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The BSA B50 MX was a air-cooled, four-stroke, single cylinder, OHV Enduro motorcycle produced by BSA in 1971. Max torque was 28.03 ft/lbs (38.0 Nm) @ 5000 RPM. Claimed horsepower was 34.06 HP (25.4 KW) @ 6200 RPM.
Engine
A 83.8mm bore x 83.8mm stroke result in a displacement of just 499.0 cubic centimeters.
Drive
The bike has a 4-speed, manual transmission. Power was moderated via the wet multi-disc, manual.
Chassis
It came with a 3.25 x 18 front tire and a 3.5 x 18 rear tire. Stopping was achieved via drum in the front and a drum in the rear. The front suspension was a telescopic fork while the rear was equipped with a dual shocks. The wheelbase was 54.02 inches (1372 mm) long.
1971 - 1973 BSA B50 MX
The 1971 BSA B50 MX sports an air-cooled, four-stroke, 499cc, single cylinder powerplant mated to a four-speed manual transmission and can produce a claimed 34 horsepower and 38 Nm of torque. This off-road machine was one of the most successful moto-cross machines designed by BSA, and had standard fittings such as a single seat, a small fuel tank, wide handlebars, a telescopic front fork coupled to dual shocks as a rear suspension, laced wheels with knobby tires mounted on them, a black steel frame and drum brakes in the front and in the rear.