BSA B21 de Luxe

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Bsa-b21-de-luxe-1937-1939-2.jpg
BSA B21 de Luxe
Manufacturer
BSA
Production 1937
Class Classic
Engine
air-cooled, four-stroke, single cylinder, OHV
Bore / Stroke 63.5mm x 63.5mm
Horsepower 4.96 HP (3.7 KW) @ 3000RPM
Transmission Gear box: 4-speed, manual

Final Drive: chain

Clutch: dry
Suspension Front: single spring girder fork
Rear: hard-tail, sprung seat
Brakes Front: none
Rear: hand lever and foot pedal working independently on rear wheel dummy rim
Wheelbase 62.01 inches (1575 mm)
Weight
Manuals Service Manual


The BSA B21 de Luxe was a air-cooled, four-stroke, single cylinder, OHV Classic motorcycle produced by BSA in 1937. Claimed horsepower was 4.96 HP (3.7 KW) @ 3000 RPM.

Engine[edit]

A 63.5mm bore x 63.5mm stroke result in a displacement of just 249.0 cubic centimeters.

Drive[edit]

The bike has a 4-speed, manual transmission. Power was moderated via the dry.

Chassis[edit]

Stopping was achieved via none in the front and a hand lever and foot pedal working independently on rear wheel dummy rim in the rear. The front suspension was a single spring girder fork while the rear was equipped with a hard-tail, sprung seat. The wheelbase was 62.01 inches (1575 mm) long.

1937 - 1939 BSA B21 de Luxe[edit]

1937 - 1939 BSA B21 de Luxe 1937 - 1939 BSA B21 de Luxe 1937 - 1939 BSA B21 de Luxe

The 1947 BSA B21 de Luxe comes with a single, sprung seat, a large fuel tank, a pea-shooter single exhaust system, wire-spoked wheels, a large headlight, a spring-loaded girder front fork, a hard-tail rear, a black steel frame and a rear luggage rack.

In the engine department it sports a four-stroke, air-cooled, 249cc, single cylinder powerhouse paired to a four-speed manual transmission and can produce 2.5 horsepower at 3000 rpm.