BSA B21 (1937-39)

Make Model: BSA B21


Year: 1937 – 39
Engine: Four stroke, single cylinder, Overhead valve
Capacity: 249 cc / 15.2 cub in
Carburetor: Amal
Oil capacity: 2.3 L / 4.8 US pints
Exhaust: Single, chrome silencer
Ignition: Magneto
Battery: 6V
Starting: Kick starter
Transmission: 4-Speed, hand change
Final Drive: Chain
Gear Ratios: 1st 18.2 / 2nd 12.4 / 3rd 8.1 / 4th 6.2
Frame: Triangulated cradle type
Front Suspension: Girder, spring loaded fork
Rear Suspension: None, spring loaded saddle
Wheelbase: 1575 mm / 62 in.
Ground Clearance: 124 mm . 4.9 in.
Fuel Capacity: 13.6 L / 3.6 US gal
Colour: Green or blue tank, black frame
Source: Bonhams


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