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Douglas Classic Motorcycles

This long-lived firm was founded in 1910 by William and Edward Douglas, two former blacksmiths, in Bristol. After a successful endurance test from John P'Groats to Land's End (39 hours 40 mins) the Douglas achieved almost instantaneous popularity and by 1911 200 men were employed at the Kingswood works. The Douglas flourished in the 1920s and 1930s and was a great favourite with speedway riders; the marque survived until 1956. Douglas motorcycle history.

Bike Image Description
1912 Douglas N, 350cc 1912 Douglas N, 350cc Douglas, renowned for the quality and reliability of their machines, presented this model N in 1912. It is equipped with chain drive to a countershaft and secondary belt drive. The horizontally opposed twin has been improved by the addition of mechanically operated intake valves (up to and including 1911 the intake valves had been automatic). The improvements were crowned by a victory in the 1912 Junior TT Race. Starting is by means of pedals; the rear wheel is equipped with a free wheel. Gear ratio of this single speed machine is 5½ : 1.
1920 Douglas W20, 348cc 1920 Douglas W20, 348cc This 1920 model is equipped with clutch, kick starter and 3 speed gear. It has a quite a few accessories, such as handlebar mounted watch, speedometer, full Lucas acetylene lighting, leather kneepads, protective shield under crankcase, holder for spare spark plugs and round leather case for spare tube or belt.
1921 Douglas 2 3/4 hp 1921 Douglas 2.75 hp  
1922 Douglas 2 3/4 hp 1922 Douglas 2 3/4 hp More Douglas 2 3/4 hp information.
1926 Douglas EW 1926 Douglas EW
  • cc
  • 350
  • Engine
  • 4 stroke twin (fore 'n aft)
  • Starting
  • Kickstart
  • Gears
  • 3 (hand)
  • Top speed
  • oh! squllions no doubt.
  • Notes
  • The brakes are 'servo' type and the clutch is housed in the external 'wheel' on the left hand side of the engine (runs at engine speed).
1926 Douglas EW 350 ccm Flat-Twin
1926 Douglas EW 350 ccm Flat-Twin Designed by Cyril Pullin and launched at the Olympia Show in 1925, the EW model was intended to benefit from the road tax concessions available to lightweights, and so weighed in at less than 200lbs. In Typical Douglas fashion the newcomers's power unit was a fore-and-aft flat twin; in EW form a fixed-head side valve with outside flywheel, hand and mechanical oil pumps and BTH magneto ignition. A gearbox mounted behind rather than above the rear cylinder, all-chain drive and decent sized drum brakes differentiated the EW from its predecessors. An unusual feature was the gearchange gate in the centre of the petrol tank. Early examples gained a reputation for unreliability but the works made numerous improvements and the model went on to achieve some notable success in the popular reliability trials of the period.
1927 Douglas EW, 350cc 1927 Douglas EW, 350cc In 1925 the new E.W model was introduced; the engine was updated and the cycle parts were modernized, the main new feature being the attractive sloping petrol tank that replaced the flat parallel one used for so many years. The gear change lever of the 3-speed gearbox was now operated through a slot in the tank. The famous Douglas silver with blue panels colour scheme was retained and the new model attracted much attention at the Motor Cycle Show, another attractive feature being its modest price of £ 45. The E.W. was immediately popular and continued with modifications for several years. This E.W is in nicely restored condition.
1928 Douglas DT, 494cc 1928 Douglas DT, 494cc This machine had no brakes or clutch, 3 speed gearbox , special frame, dual control twin carburettors and strengthened rear wheel construction, to name just a few dirt track specialities. Alcohol fuel and a 14:1 compression ratio made this a very fast machine.
1928 Douglas SW5, 500cc 1928 Douglas SW5, 500cc
1928 Douglas SW5 Douglas SW5
1931 Douglas F31, 500cc 1931 Douglas F31, 500cc
1947 Douglas T35(Mk 1), 350cc 1947 Douglas T35(Mk 1), 350cc
1949 Douglas Mk4 1949 Douglas Mk4 350cc.
1949 Douglas Mk3 1949 Douglas Mk3 350cc
1950 Douglas T35 Douglas T35 350cc.
1952 Douglas Mk5 Douglas Mk5

Douglas announced their new horizontally opposed across the frame twin during September 1945 with production of the new model, typed the T35 Mk I commencing in 1947. The new model was notable not only for the engine configuration but also the rolling chassis which featured a pivoted fork rear frame sprung with torsion bars and leading link forks, typed "Radiadraulic" by Douglas, with compression springs and hydraulic damping.

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1952 Douglas Mk5 1952 Douglas Mk5 350cc. A revised model, benefiting from improved cylinder heads developed by Freddie Dixon was introduced during 1948, typed the Mk III, followed by the Mk IV in 1950 with a revised rear sub-frame and new toolboxes and the Mk V, as offered here in 1951, which featured a revised front mudguard and mounting.
1954 Douglas Mk4 1954 Douglas Mk4
1954 Douglas Vespa Model G 1954 Douglas Vespa Model G 125cc.
1954 Douglas Dragonfly 1954 Douglas Dragonfly

The traditional Douglas layout was for the engine to be mounted longitudinally, although in the ten years up to 1956, when motorcycle production stopped, engines were fitted transversely - as is the case with this attractive looking Dragonfly, the last of the line. Elegant flowing styling with headlamp nacelle blending into the fuel tank and Reynolds-Earles pivoted front forks gave the Dragonfly a most distinctive appearance.

More Douglas Dragonfly information.

Douglas Dragonfly - 1956 Douglas Dragonfly
  • Engine - 348cc, horizontally opposed twin-cylinder four-stroke
  • Bore and Stroke - 60.8 x 60 mm
  • Launched - 1953-1956
  • Weight - 365lb
  • Carburettor - Amal Monobloc
  • Top Speed - 75 mph
  • 1957 Douglas Dragonfly, 350cc 1957 Douglas Dragonfly, 350cc The Dragonfly arrived in 1955 and featured a revised engine with stronger crank case, single carburettor and updated electrics and ignition. The duplex frame employed a conventional swinging arm with Girling dampers in place of the preceding torsion bar arrangement, while the Radiadraulic front fork gave way to an Earles-type leading link set up.
    1957 Douglas Dragonfly
    Douglas Dragonfly

    Introduced during 1955 the Dragonfly featured a completely revised set of cycle parts housing an engine that, although clearly derived form the earlier unit, had been refined. Consequently a stiffer crankshaft assembly was fitted to a stiffer set of crankcases. A pivoted fork frame with conventional shock absorbers and Earles forks housed the power unit. Valanced mudguards and a fuel tank which blended into the fixed headlight housing endowed the machine with clean lines.

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    Douglas Dragonfly Douglas Dragonfly  

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