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 |
| Horse Power | 4.96 HP (3.7 KW) @ 3000RPM |
| Transmission | Gear box: 4-speed, manual Final Drive: chain |
| 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) |
| Manuals | Service Manual |
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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
A 63.5mm bore x 63.5mm stroke result in a displacement of just 249.0 cubic centimeters.
Drive
The bike has a 4-speed, manual transmission. Power was moderated via the dry.
Chassis
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
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.