Les was the first winner of the prestigious 500 cc class , riding an AJS Porcupine .
The Motorcycle World Championships were first held in 1949 , a year before the beginning of the four - wheeler Formula One World Championship .
Les was the first winner of the prestigious 500 cc class , riding an AJS Porcupine .
The Motorcycle World Championships were first held in 1949 , a year before the beginning of the four - wheeler Formula One World Championship .