Greeves motorcycles were produced in a purpose-built factory at Thundersley in Essex, England from 1953 to 1976. Initially the bikes were an offshoot of the Invacar company that produced invalid cars and needed to diversify its products. The founder of the concern was O.B. (Bert) Greeves MBE.

The bikes exclusively used two-stroke powered, using proprietary engines from Villiers and British Anzani, initially and always for the roadsters, but by 1964 they had developed their own engine for competition use. For a few years, Greeves were remarkably successful in competition, with wins in the European Motocross Championship, the Manx Grand Prix, the European Trials Championship and the Scottish Six Days Trial, and with Gold medals in the ISDT and the ACU 250cc Road Race.

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