Motorcycle Classics

1954 BSA B34 “Alloy Clipper”

Reader Contribution by The Motorcycle Classics Staff

1954 BSA B34 “Alloy Clipper”

Country: Great Britain
Engine: Air-cooled single-cylinder 4-stroke
Ignition: Lucas magneto with manual spark control
Power Rating: 28hp @ 5,500rpm
Bore x Stroke: 85mm x 88mm
Displacement: 499cc
Valves: Overhead, pushrod activated
Fuel System: Single Amal Monobloc carburetor
Transmission: 4-speed
Suspension: Front telescopic forks, rear twin shock
Brakes: Front and rear drum
Weight: 320lb
Top Speed: 70mph

Sold in the U.S. for trail or enduro use, the Alloy Clipper is often mistaken for a Gold Star, but is an export version of the B34 observed trials machine. The alloy cylinder and cylinder head are of the small fin style from the earlier ZB model, used to reduce weight. The modest power that this motor produces doesn’t require a lot of cooling fins.

  • Published on Mar 26, 2014
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