Description
Douglas 1929 “B/29” 348 cc side valve flat twin frame # 1700 engine # EN 1571
Douglas decides to restyle the successful EW model for the 1929 season.
A noticeable new feature is the sump lubrication system: the oil is contained in a finned sump that has been bolted to the underside of the
engine.
It is fed under pressure to the mainshaft by a submerged rotary vane pump.
Other modifications include the use of a much larger silencer, black painted valve caps, new flat top pistons with three rings, heavier valve gear and the provision for sliding the engine unit in the frame to facilitate adjustment of the primary chain.
The new model, designated the B/ 29, also has a new design of saddle tank.
The tank holds 2 ½ gallons of petrol and the sump contains half a gallon of oil.
The B /29 costs £ 45 without lights: 30 shillings extra has to be paid for an acetylene lighting system.
The BTH electric lighting system with “ pancake” dynamo on this machine is a very expensive option at £ 6 and 5 shillings extra.
This interesting late vintage Douglas is unrestored and original and comes complete with Cowey speedometer and steering damper.