Greeves Motorcycles is an historic British motorcycle manufacturer originally founded by Bert Greeves which produced a range of road machines. The original company produced motorcycles from 1952, funded by a contract with the Ministry of Pensions for their Invacar, a three-wheeler for disabled drivers. By 1962 there were eleven motorcycle models in the Greeves range. The last of the Challenger models was produced in 1968, replaced by the 250 and 380cc Griffon motocrossers in 1969. The original leading link fork was no longer fitted, having been replaced by standard telescopic forks as the leading link design could not match the travel of forks. The company floundered in 1976, and after a fire at the factory were unable to resume production, resulting in receivership.