125cc Classification
| Pos | No. | Rider | Manufacturer | Laps | Time/Retired | Grid | Points |
|---|---|---|---|---|---|---|---|
| 1 | 10 | Lucio Cecchinello | Honda | 26 | 43:28.423 | 8 | 25 |
| 2 | 13 | Marco Melandri | Honda | 26 | +9.173 | 3 | 20 |
| 3 | 52 | Hiroyuki Kikuchi | Honda | 26 | +9.317 | 11 | 16 |
| 4 | 4 | Kazuto Sakata | Aprilia | 26 | +17.268 | 1 | 13 |
| 5 | 8 | Gianluigi Scalvini | Honda | 26 | +19.417 | 12 | 11 |
| 6 | 29 | Ángel Nieto, Jr. | Aprilia | 26 | +19.511 | 16 | 10 |
| 7 | 41 | Youichi Ui | Yamaha | 26 | +21.010 | 19 | 9 |
| 8 | 9 | Frédéric Petit | Honda | 26 | +23.034 | 5 | 8 |
| 9 | 5 | Masaki Tokudome | Aprilia | 26 | +23.066 | 15 | 7 |
| 10 | 22 | Steve Jenkner | Aprilia | 26 | +23.552 | 18 | 6 |
| 11 | 62 | Yoshiaki Katoh | Yamaha | 26 | +26.762 | 21 | 5 |
| 12 | 39 | Jaroslav Huleš | Honda | 26 | +31.484 | 20 | 4 |
| 13 | 58 | Álvaro Molina | Honda | 26 | +41.584 | 23 | 3 |
| 14 | 60 | Fonsi Nieto | Aprilia | 26 | +42.512 | 22 | 2 |
| 15 | 17 | Enrique Maturana | Yamaha | 26 | +50.521 | 27 | 1 |
| 16 | 23 | Gino Borsoi | Aprilia | 26 | +55.673 | 14 | |
| 17 | 71 | Josep Sarda | Honda | 26 | +59.576 | 26 | |
| 18 | 65 | Andrea Iommi | Honda | 26 | +1:10.446 | 28 | |
| 19 | 73 | Iván Martínez | Aprilia | 26 | +1:33.316 | 24 | |
| Ret | 32 | Mirko Giansanti | Honda | 24 | Accident | 7 | |
| Ret | 3 | Tomomi Manako | Honda | 24 | Accident | 9 | |
| Ret | 15 | Roberto Locatelli | Honda | 20 | Retirement | 4 | |
| Ret | 59 | Jerónimo Vidal | Aprilia | 18 | Accident | 17 | |
| Ret | 7 | Emilio Alzamora | Aprilia | 17 | Retirement | 2 | |
| Ret | 26 | Ivan Goi | Aprilia | 15 | Retirement | 13 | |
| Ret | 14 | Federico Cerroni | Aprilia | 14 | Accident | 25 | |
| Ret | 20 | Masao Azuma | Honda | 13 | Accident | 6 | |
| Ret | 16 | Christian Manna | Yamaha | 10 | Retirement | 29 | |
| Ret | 21 | Arnaud Vincent | Aprilia | 2 | Accident | 10 | |
| DNS | 72 | Sebastián Perelló | Honda |
| Previous race: 1998 French Grand Prix |
FIM Grand Prix World Championship 1998 season |
Next race: 1998 Dutch TT |
| Previous race: None |
Madrid Grand Prix | Next race: None |
Read more about this topic: 1998 Madrid Motorcycle Grand Prix