Sunbeam Motorcycles

Today in Motorcycle History

Sunbeam 1924 Models

A much-revised range of motorcycles was introduced, along with model numbers, which were to to be used by Sunbeam for the remainder of their production at Wolverhampton.

The new 347cc 2¾ h.p. Models 1 and 2 were introduced in sports and touring versions, the Model 2 by being fitted with footboards rather than footpegs, whilst the 'square'-stroke 499cc engine was reduced to two models - the Standard and the 'Light Solo' versions. The latter model continued to use the Longstroke's cycle parts.

A new Model 4 Deluxe (599cc) motorcycle was added to the range. It took its engine from the existing 4½ h.p. model, fitted into the 3½ h.p. Standard model's frame. The 1923 4½ h.p. model itself continued in production as the Model 7. Aimed at side-car work it was to be the last flat tank motorcycle to remain in production - still available in 1932 long after saddle tank motorcycles had emerged.

Over-head valve (OHV) machines were introduced in 350cc and 500cc capacities. Both a 'parallel' and a 'sprint' framed version were available for each. The 350cc models were designated Models 8 and 10 respectively; and the 500cc models designated Models 9 and 11 respectively.

The 4½ h.p. model gained a four-speed constant-mesh 'rack and pinion' gearbox, an up-grade intended for the 8 h.p. JAP v-twin which had been dropped from the range.

The range for 1924 consisted of:

Model 1: 347cc 2¾ h.p. side-valve
Model 2: 347cc 2¾ h.p. side-valve
Model 3: 499cc side-valve (3½ h.p. Standard)
Model 4 Deluxe: 599cc side-valve
Model 5 Light Solo: 499cc side-valve
Model 6 Longstroke: 492cc side-valve
Model 7: 599cc side-valve
'Parallel' Model 8: 347cc OHV
'Parallel' Model 9: 493cc OHV
Model 10 Sprint: 347cc OHV
Model 11 Sprint: 493 OHV