Wayne Gardner became Australia's first-ever 500cc World Champion in a season that saw him score points in every Grand Prix.
[1] Venezuelan Carlos Lavado's defense of his 250 crown was spoiled by injuries sustained in a pre-season crash.
[1] A new brand would announce its arrival in the 250 class when an Aprilia ridden by Loris Reggiani won the San Marino Grand Prix.
[1] Garelli's Fausto Gresini won ten out of eleven races in the 125 class, but ruined his bid for a perfect season when he crashed at the last round in Jarama.
The safety of the Autódromo Municipal del Parque Almirante Brown de la Ciudad de Buenos Aires was totally unsuitable for racing; the organization of this Grand Prix was so bad that spectators had easy access to the circuit while the races were going on.