1933 Sunbeam Model 90

Reader Contribution by The Motorcycle Classics Staff
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1933 Sunbeam Model 90

Country: Great Britain
Engine: Air-cooled, single-cylinder 4-stroke
Ignition: Magneto
Bore x Stroke: 80mm x 98mm
Displacement: 493cc
Valves: Overhead, pushrod activated
Fuel System: Amal Carburetor
Transmission: 3-speed
Suspension: Front girder, rigid rear
Brakes: Front and rear drum
Weight: 305lb
Top speed: 90mph

The Model 90 Sunbeam was a very well designed motorcycle. Modified for racing, they were the winning machines in the Tourist Trophy races in the Isle of Man, with three first places in the late 1920s. A Model 90 was the last pushrod 2-valve motor to win a Senior (500cc) TT.

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