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He specialized in racing small displacement bikes such as in the 50 cc, 80 cc and 125 cc classes but many fellow racers, including former world champion Barry Sheene consider him among the greatest motorcycle racers of all time.
Moore encouraged him to go to the Norton factory, where he helped Polish engineer Leo Kusmicki design and develop the Featherbed framed Manx Norton single-cylinder racing models that won world championships in the early 1950s.
Riders such as Jan de Vries and Henk van Kessel won world championships and set speed records with these machines.
Britain's Cecil Sandford piloted the new MV 125 to a 1952 Isle of Man TT victory and went on to win MV Agusta's first world championship.
He had his most successful years in 1973 when he finished in second place behind Giacomo Agostini in the 350cc World Championship, second in the 250 championship to Dieter Braun, and in 1976 when he finished second to his Suzuki team-mate Barry Sheene, in the 500cc world championship.