The Douglas 1911 HP Model WD 22 349ccm SV flat twin frame engine. This Bristol-based firm developed the horizontally opposed fore-aft unit in about 1907 and continued utilizing this engine layout well into the thirties. The earliest Douglas models had direct belt drive, but in 1910 a 2-speed gearbox was added, with the control on top of the petrol tank. Douglas machines became very popular because of their lightness, ease of starting and speed: in the 1912 Junior TT races Douglas took first, second and fourth places.



By 1920, the standard 2 model W had a 3-speed countershaft gearbox with kick-starter, a clutch and footboards. The WD had the basic veteran specification of 2-speed gearbox and did not have the luxury of a clutch. Lubrication is by means of hand pump with drip feed regulator. The petrol tank holds 5-litres, the oil compartment 1 litres. Petrol consumption: about 1 litre per 30 km. More specs and user manual of Douglas 1911 you can see in next overview.