Over 85,000 of these machines are on the road to-day. The testimonials constantly received are convincing proof of its wonderful popularity.
A really sound, reliable Douglas motor cycle at a figure within range of all pockets.
ENGINE - Vibrationless horizontally opposed twin-cylinder. Bore 60.8 mm. x 60 mm. stroking, giving 348 c.c.
CRANKCASE - Neat polished aluminium casting. All threads and bearing housings supported in in cast brass rings and bushes.
CYLINDERS - Fine iron castings.
VALVES - Made of specially forged 18 per cent. tungsten.
PISTONS - Special crucible cast iron of 18 tons tensile, with two narrow rings at the top.
CRANKSHAFT - A solid steel stamping machined all over and ground, running in two heavy-duty ball bearings of robust dimensions.
MAGNETO - E.I.C. or other first-class British make.
LUBRICATION - Semi-automatic—a spring-returned hand pump set in the tank at a convenient angle for working, forces oil through the needle valve in the sight feed to the front cylinder. From here the oil passes to wells in the crank case, into which the big ends dip and distribute oil to the rear cylinder.
CARBURETTER - Douglas or Amac, according to supplies.
COUNTERSHAFT UNIT - Douglas indestructible two-speed gear box. Pinions 5 percent, nickel steel of the constant mesh type, the drive being engaged by sturdy sliding dogs. Gear ratios : 6 and 9 3/8 (approx.).
TRANSMISSION - Engine to gear box 5/8" x 1/4" chain, gear box to rear wheel 3/4" belt. Belt slip and belt troubles arc unknown, due to the even torque of the opposed twin engine and large pulley diameters.
The model that gave yeoman service to Despatch Riders during the Great War.
BRAKES - Powerful shoe operating in "V" of belt run, by conveniently placed toe pedal on right-hand side. Front - special design hand-operated rim brake.
FRAME - Of highest-grade butted weldless steel tubing. Lugs machined from solid steel stampings. All lugs for generator, tool bags, etc., are brazed on solid.
SPRING FORKS - Exceptionally well designed, giving wide movement and big clearances. The side plates move in unison and so keep the fork sides tn perfect alignment. The hollow spindles carry an ample supply of lubricant and large greasing caps.
FOOTRESTS - Detachable, tubular, with substantial solid rubber pads.
HANDLE-BARS; - The Douglas new flat touring shape give an upright riding position with a natural wrist angle and hand grip, and ensure perfect control of machine on bad roads.
MUDGUARDS - For 1925 are an interesting feature, strong section, giving ample protection.
CARRIER - A rigid tubular construction neatly housing two metal-covered tool bags.
TANK - Sturdily built. Extra large filler caps - drain cock - petrol filter to main supply - capacity: 1 1/4 gall, petrol; 3 pints oil.
SADDLE - Douglas patent pan scat insulated from shock by a sprung nose, and at the rear by large diameter coil springs - exceedingly low and comfortable,
TYRES - 26" x 2 1/4" first-class make, according to supplies,
HUBS - Adjusting type, solid axle and cones, oil retaining, dirt and waterproof.
CONSUMPTION; - Oil, 1.000 m.p.g. ; petrol, 90-100 m.p.g.
STANDARD EQUIPMENT - Complete kit of tends, pump, and oil or grease gun.
Overall length, 7' 1", Overall width of handle-bars, 2' 8".
Weight, under 200 lbs. Brings machine within range of the 30/- tax, and is guaranteed with each, This applies on It/ to U.K.
Acetylene lighting, which includes headlamp, generator, and lamp brackets etc, also horn, extra.
APPROXIMATE WEIGHTS AND MEASUREMENTS.
Nett Weight .. 1 cwt. 2 qrs. 20 lbs.
Gross ,, 3,, 1 ,, 20 ,,
Measurements: 89in x 17in.x 42in.
Price in UK. - £39 : 10 : 0
Douglas gained first five places in the San Sebastian Grand Prix.