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Production 1921
Class Classic
air-cooled, four-stroke, V-Twin, side valve
Bore / Stroke 76.2mm x 76.2mm
Horsepower 4.96 HP (3.7 KW) @ 3000RPM
Transmission Gear box: 3-speed, manual
Final Drive: chain
Suspension Front: single spring girder fork
Rear: hard-tail, sprung seat
Manuals Service Manual

The BSA A was a air-cooled, four-stroke, V-Twin, side valve Classic motorcycle produced by BSA in 1921. Claimed horsepower was 4.96 HP (3.7 KW) @ 3000 RPM.

Engine[edit | edit source]

A 76.2mm bore x 76.2mm stroke result in a displacement of just 770.0 cubic centimeters.

Drive[edit | edit source]

The bike has a 3-speed, manual transmission.

Chassis[edit | edit source]

The front suspension was a single spring girder fork while the rear was equipped with a hard-tail, sprung seat.

1921 - 1924 BSA A[edit | edit source]

1921 - 1924 BSA A 1921 - 1924 BSA A 1921 - 1924 BSA A 1921 - 1924 BSA A

The 1921 BSA A has, at its heart, an air-cooled, four-stroke, 770cc, V-Twin powerplant paired to a three-speed manual transmission and can produce a claimed 5 horsepower at 3000 rpm. This classic machine had features such as wire-spoked wheels, a single seat, a hard-tail rear suspension, a rear luggage rack, pull-back handlebars, full-fenders and rider floorboards.