KD was a motorcycle marketed between late 1907 and 1909 by Leo Ripault and Co of Poland Street, Oxford Street, London.
The device was a bicycle attachment that fitted within the main frame to drive the rear wheel by belt, tensioned by a jockey-pulley.
Two engine sizes were available at either 1.5 h.p. or 2 h.p.
The make was listed for two years.
See also K.D. by Keller-Dorian
The K.D. motor bicycle. This is a lightweight motor cycle attachment for attaching to ordinary bicycles. We illustrated the engine in our report of the Paris Show. The principal novelty in connection with the engine is the fitting of the valves one within the other, the inlet being concentric with the exhaust. Battery ignition is employed, and the total weight of machine is about 75 lbs.
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