The rain fell hard but the racing was red hot as the world championship moved to the famous Spa circuit.
Eddie Lawson was leading the 500 cc championship but would he be able to maintain the form he had previously demonstrated on the V-4 Marlboro Yamaha?
This top-rate video gives you the answers as the world's star riders and teams battle it out.
Breathtaking camera angles ensure maximum fireside entertainment on the slippery twists and turns, and capture the many thrills and spills at the renowned La Source Hairpin.
The 250 cc world championship was also run in the rain and provided a battle royale with Honda, Yamaha and Armstrong engaged in further gripping encounters.