In the post-war 'austerity' period of scarcity, there was a need for economical transport, met by the creation of 'clip-on' motor-units for attachment to any serviceable bicycle. One was this ingenious, friction-drive unit, initially made by G.Y.S. of Bournemouth as the 'Motamite' but later marketed as the 'Mocyc' by Cairns Cycles of Todmorden, Lancashire. Unusually, a one-piece alloy casting formed virtually the whole unit, tank included, ignition being by Wipac. Vanishingly rare amongst cycle-motors, this original, registered and fully roadworthy example, complete with V5C and a rare G.Y.S. handbook, is ready for NACC events, subject, of course, to the usual checks.