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.
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.