GYS produced bicycle attachment engines from 1949 to 1955 in Bournemouth which were distributed by the Cairns Cycle firm.
1951 A kit was offered by Cobli of London, to mount the engine under the saddle in order to drive the rear wheel. That year the GYS name was changed to Motamite.
1952 The name changed yet again, this time to Mocyc.
1955 Still known as the Mocyc, the make came to an end.
"Manufacture under licence of the GYS 49cc two-stroke front-wheel-drive cycle attachment is being undertaken by the Cairns Cycle and Accessory Mfg. Co. Ltd., Stoneswood, Todmorden, Lancs."
The Motor Cycle, 1 December 1949
Cairns built the engines from 1949 and obtained full rights to the design in 1951. It remained in their catalogue until 1956.
Sources: Graces Guide, icenicam.org.uk
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