1989 Grand Prix motorcycle racing season
The 1989 Grand Prix motorcycle racing season was the 41st F.I.M. Road Racing World Championship season.
Season summary
Defending champion Eddie Lawson stunned most observers by switching from the Yamaha to Honda in the offseason then proceeded to win the championship, becoming the first man to win two consecutive 500cc championships on two different brands. On why he left Yamaha for Honda: "Giacomo Agostini, the Marlboro Yamaha team manager, started playing games, saying stuff like, 'I don't know if we can pay you the same as we did in 1988.' I'd just won my third title, so that was tough to hear. Also, I found out Ago was talking to Kevin Schwantz. I met with Erv and told him that I needed a change. When Marlboro discovered I was talking with Honda, they doubled their offer, but it was too late. I actually took a pay cut to ride the Honda."Wayne Rainey and Kevin Schwantz continued to perform impressively while Freddie Spencer made a less than successful comeback attempt with the Marlboro Yamaha team. Australian Wayne Gardner was out for most of the season after breaking his leg at Laguna Seca but not before winning the inaugural Grand Prix in his home country. Another Australian made his Grand Prix debut for the Rothmans Honda team with Mick Doohan scoring a third-place finish at the Hockenheimring. The FIM awarded half points for the rain-drenched Belgian Grand Prix after organisers restarted the race three times contrary to FIM race regulations. The Nations Grand Prix at Misano was boycotted by most of the top riders for safety reasons.
Sito Pons won a second consecutive 250 championship for Honda while Spanish teenager, Àlex Crivillé won the 125 crown on a JJ Cobas. Derbi rider Manuel Herreros had the honor of winning the final 80cc championship as the class would be discontinued after 1989.
1989 Grand Prix season calendar
The following Grands Prix were scheduled to take place in 1989:| Round | Date | Grand Prix | Circuit |
| 1 | 26 March |  Grand Prix of Japan | Suzuka Circuit |
| 2 | 9 April |  Swan Premium Australian Motorcycle Grand Prix | Phillip Island Grand Prix Circuit |
| 3 | 16 April |  Dunlop USGP | Laguna Seca Raceway |
| 4 | 30 April |  Marlboro Gran Premio de España de Motociclismo | Circuito Permanente de Jerez |
| 5 | 14 May |  G.P. Delle Nazioni | Circuito Internazionale Santa Monica |
| 6 | 28 May |  Großer Preis von Deutschland für Motorräder | Hockenheimring |
| 7 | 4 June |  Großer Preis von Österreich | Salzburgring |
| 8 | 11 June |  Yu Grand Prix | Automotodrom Rijeka |
| 9 | 24 June |  Dutch TT | TT Circuit Assen |
| 10 | 2 July |  Belgium Motorcycle Grand Prix | Circuit de Spa-Francorchamps |
| 11 | 16 July |  Grand Prix de France | Bugatti Circuit |
| 12 | 6 August |  Shell British Motorcycle Grand Prix | Donington Park |
| 13 | 13 August |  Swedish TT | Scandinavian Raceway |
| 14 | 27 August |  Grand Prix CSSR-Brno | Brno Circuit |
| 15 | 17 September |  Brazilian Grand Prix | Autódromo Internacional Ayrton Senna |
Calendar changes
- The Australian Grand Prix was added to the calendar.
- The Expo 92 Grand Prix was taken off the calendar, as well as the Jarama circuit.
- The Nations Grand Prix moved from the Imola circuit to the Circuito Internazionale Santa Monica.
- The German Grand Prix moved from the Nürburgring to the Hockenheimring.
- The French Grand Prix moved from the Paul Ricard circuit to the Bugatti Circuit in Le Mans.
Participants
500cc participants
250cc participants
Results and standings
Grands Prix
500cc riders' standings
;Scoring systemPoints are awarded to the top fifteen finishers. A rider has to finish the race to earn points.
| Position | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th | 11th | 12th | 13th | 14th | 15th |
| Points | 20 | 17 | 15 | 13 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
250cc standings125cc standings80cc standings |