Model Range
Little change from 1920, but the 3½ h.p.
model was available in three versions, reflecting Thomas Corbett de la Hay's
TT win the previous year.
Cycle Parts
Five styles of handle bar were available. The leaf spring front forks
were used on the Standard model. The T.T. model had rim brakes at front
and back.
Engine and Gearbox
A higher compression engine was available for the Semi-Sporting model,
and a high compression sports engine for the T.T. model. The latter also had a
smaller and lighter three-speed gearbox with 'crash' sliding pinions rather
than constant mesh. This was to become the standard Sunbeam gearbox.
Sources:
* Robert Cordon Champ, 1980, 'The Sunbeam Motorcycle'. Haynes Publishing. |