British Motorcycles

Kelly Patent Cycles

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.

Sources Grace's Guide

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Allen Motorcycle Museum
Allen Motorcycle Museum
Private museum in Boston, MA, with many highly collectable vintage motorcycles for sale.