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Kelly was a motorcycle produced in 1921 by Kelly Patent Cycles of Black Lion Street, Brighton, Sussex.
This very primitive design had an unconventional open frame. It had a 318cc two-stroke Dalm engine and two-speed Sturmey-Archer gearbox, and was sprung by means of a leaf spring together with the rider's saddle and a rear carrier, to give insulation from road shocks.
The model was tested by a reporter from a specialist magazine and found to be unstable, as the drive became deranged. Tests were curtailed and modifications were supposed to be in hand, but nothing further came of the enterprise.
The British Motorcycle Directory - Over 1,100 Marques from 1888 - by Roy Bacon and Ken Hallworth. Pub: The Crowood Press 2004 ISBN 1 86126 674 X