Claim: Italy's Carlo Ubbiali	on a MV Agusta ranked 1st in the 125cc standings of the 1955 Grand Prix motorcycle racing season, seventh F.I.M.   Road Racing World Championship Grand Prix season that was held on May 1st.
Evidence: The 1955 Grand Prix motorcycle racing season was the seventh F.I.M. Road Racing World Championship Grand Prix season. It began on 1 May, with Spanish Grand Prix and ended with Nations Grand Prix in Italy on 4 September. 1 Italy Carlo Ubbiali Italy MV Agusta