Sunbeam Model 7


Make Model.

Sunbeam Model 7 and 7A


1922 - 40


Single cylinder, side valve


596 cc / 36.4 cu in
Bore x Stroke 77 x 105.5 mm
Cooling System Air cooled
Exhaust Single


Power 3.2 kW / 4.25 hp
Transmission 4-Speed 
Final Drive Chain 
Frame Single downtube cradle

Front Suspension

Druid forks

Rear Suspension

Rigid, spring loaded saddle

Front Brakes


Rear Brakes

Wheels Steel, laced wire spokes

A combination of the Longstroke's 105.5 mm stroke and the Standard model's 85 mm bore produced a larger engined 596cc motorcycle intended for side car work. From 1924 it was designated the 'Model 7'. This replaced the JAP-engined v-twin in the company's model range. It was a splendid “slogger” which pulled great weights and lasted seemingly forever.

Famously, the Model 7 Sunbeam continued into the early 1930s as a flat tank machine, well after the universal change to saddle tank motorcycle design in the late 1920s. In 1932 it was replaced by the 598cc version of the saddle tank Lion, known as the 'Model 7A', and later simply as the '600cc Lion'.