As in 1929, the model range included side-valves in 347cc and 492cc
versions. Each was available in touring and sporting trim. For the 347cc,
Model 1 was the touring version, Model 2 the sports. For the 492cc, Model 5
was the touring version, Model 6 the sports.
The 596cc, side-valve Model 7 flat tank motor cycle remained available.
The ICI-branded 'Lion' was a mid-season introduction to the side-valve
range. Its pared-down-to-a-price appearance included a chrome tank with
black panels, and Webb-style, centrally sprung, front forks. It was to
become the basis of the factory's future side-valve range.
Models 8 and 9 are the 347cc and 493cc OHV machines, respectively. Each
was available as a sporting version - the Model 80 and Model 90.
A speedway motor cycle was also introduced, based around the Model 9
[text to follow]]
Engine and gearbox
[text to follow]
* John Marston Ltd., 1930 Sunbeam motor cycles catalogue, 'Spend 1930
* John Marston Ltd., Sunbeam Motor Cycle Manual 1930.
* 'Motor Cycling' magazine, January 14, 1931.
* Robert Cordon Champ, 1980, 'The Sunbeam Motorcycle'. Haynes Publishing.
1930 catalogue cover