Sunbeam Model 3

 

   

Make Model.

Sunbeam Model 3

Year

1915 - 26

Engine

Single cylinder, side valve

Capacity

499 cc / 30.5 cu in
Bore x Stroke 85 x 88 mm
Cooling System Air cooled
Exhaust Single

Starting

Kick
Power 2.6 kW / 3.5 hp
Transmission 3-Speed 
Final Drive Chain 
Frame Single downtube cradle

Front Suspension

Druid forks

Rear Suspension

Rigid, spring loaded saddle

Front Brakes

Drum

Rear Brakes

Drum
Wheels Steel, laced wire spokes
   

 

With a number of changes, notably a chain-driven magneto, the  3½ h.p. model became a 'General Service' machine for the War Department during the First World War.

With further changes and refinements this 499cc model remained in continuous production into the post-war years until 1926. It was designated the 'Model 3' when Marston introduced model numbers in 1924.