After losing his crown to Cecil Sandford in 1952, he re-signed with MV Agusta. He went on to become their top rider, winning six 125cc titles and three 250cc crowns and scoring double championships in 1956, 1959, and 1960.[2] Ubbiali was also a five-time winner at the prestigious Isle of Man TT races.[6][7] He rarely made a mistake while competing, as evidenced by the fact that he never suffered a serious crash during his 12-year Grand Prix career.[3]
Ubbiali retired at the age of 30 while still in his prime. Until the motorcycle racing career of Giacomo Agostini, he was considered Italy's greatest motorcycle racer.[3] His nine World Championships tie him with Mike Hailwood and Valentino Rossi for third place on the championship win list behind only Giacomo Agostini and Ángel Nieto.