BSA B50 MX

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
Horsepower	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 Clutch: wet multi-disc, manual
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)
Length	85.0 inches (2159 mm)
Width	29.02 inches (737 mm)
Seat Height	32.01 inches (813 mm)
Weight	140.0 kg (wet)
Manuals	Service Manual

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.