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Wartnaby and Draper of Coventry. Also as WD Ltd
WD was a motorcycle produced by them from 1911 to 1913. Also sold motorcycles through Service and Colonial
Late in 1911, a machine appeared that was different from the rest. The engine was made by Monk Engineering Co. It had a pressure lubrication system with a gear pump submerged in the oil in the sump. Both main bearings, the big end and the gudgeon pin were force fed in an era when most still relied on a hand pump, sight bowl and drip feed. Other 496cc engine details were a separate cylinder head, both it and the barrel being held by three long bolts, and a front-mounted magneto. It also had Druid forks and belt drive.
The machine carried on in that form until 1913.