Honda's Freddie Spencer gave a dominating performance becoming the first man to win the 250 and 500 championships in the same year.
Australian Wayne Gardner showed promise with a fourth-place finish for Honda.
With perennial champion Angel Nieto moving to the 80cc class, the 125 class was left open for his Garelli teammate, Fausto Gresini to clinch the title, giving the Italian team its fourth consecutive championship.
Angel Nieto won his 90th and final Grand Prix victory in the 80cc round in France, at the time second only to Giacomo Agostini, but since surpassed by Valentino Rossi.
[1] The following Grands Prix were scheduled to take place in 1985:[2][3] †† = Saturday race [6] Points are awarded to the top ten finishers.