The 350cc OHV Model 10, introduced the previous year, is included within
the season's catalogue but is phased out during the year.
Both the side-valve Lion and OHV Model 9 are available in
500cc and 600cc versions. The 500cc Lion is re-named the Model 6A, whilst
the 600c Lion replaces the flat-tank Model 7 and is called the Model 7A.
This is the final year that the flat tank Model 7 is available from stock.
There is a return to the all-black, gold-lined petrol tank after the
previous year's use of a chrome plated tank with black panels.
The rear mudguard acquires a hinge, and additional lower stay,
to allow easy removal of the back wheel. Front and rear wheels are designed
to be interchangeable, which requires a redesign of the front forks. The
'dog leg' fork is introduced on all models except the Model 10.
Engine and gearbox
The side-valve Lion engine is redesigned appearing in 500cc and 600cc versions.
Most noticeably, it gets a
detachable cylinder head, and the side valves are enclosed within a protective box.
Its exhaust pipe is increased from 1½ inch to 1¾ inch.
A 4-speed gearbox is introduced. The push-rod clutch
mechanism with its cast bridge is also replaced. A quick thread clutch
mechanism is introduced on the near-side (primary drive) side of the
* John Marston Ltd., 1932 Sunbeam Motor Cycle Catalogue.
* John Marston Ltd., 1932 Sunbeam Motor Cycle Manual.
* Robert Cordon Champ, 1980, 'The Sunbeam Motorcycle'. Haynes Publishing.
* Robert Cordon Champ, 1989, 'The Illustrated History of Sunbeam Bicycles and
Motorcycles'. Haynes Publishing.