The 1989 Belgian motorcycle Grand Prix was the tenth round of the 1989 Grand Prix motorcycle racing season. It took place on the weekend of 30 June-2 July 1989 at Spa-Francorchamps.

Kevin Schwantz makes it six poles in a row, and John Kocinski makes his 500 debut.

The first turns go to Eddie Lawson, Wayne Rainey and Schwantz. Christian Sarron watches from fourth as the three ahead scrape fairings. The quartet get well clear, but wet patches begin to appear on the track.

Rainey and Schwantz raise their hands to stop the race, but ahead of them Lawson and Sarron continue at race pace. Lawson soon becomes aware of the water and raises his hand too, but Sarron, perhaps under the mistaken impression that he’s dropping the other three, seems too enthusiastic to stop and loses the front-end on a fast left. The riders pit with 5 laps raced.

It looks like the restart on aggregate time will be dry, and again Lawson, Rainey and Schwantz get away at the front, though the sky darkens. Again, the leaders raise their hands after the 9th lap, but before everyone can pit, Mick Doohan and Kocinski collide, sliding without serious injury.

The podium of the second leg is Lawson, Schwantz and Rainey, but the race organizers decide to run a third leg in the wet.

The third race sees Schwantz get away from Rainey, while Lawson gets into a tussle with Kocinski for third. On the last lap, with a comfortable lead, Schwantz crashes out on the brakes, and Rainey wheelies in for the lead, followed by Kocinski and Lawson. However, the results of the third race are later nullified, giving Lawson the win and closing the gap to Rainey. The points are later halved when a rule is discovered that only one restart is allowed.

The FIM had decided by 1989 that there could be no more than two starts and that after the second race, started on slicks, was stopped due to rain, the race would be deemed complete.