| Vasile SUPROVICI | MLD | 5 Races |
| Thomas SURANYI | FRA | 1 Races |
| Anxo SUSAVILA | ESP | 2 Races |
| Elvis SUTKUS | LTU | 14 Races |
| Sutrisno SUTRISNO | INA | 14 Races |
| Sarawut SUWANNASO | THA | 4 Races |
| Wojciech SUWINSKI | POL | 1 Races |
| Dedi Kurniawan SUYATNO | INA | 8 Races |
| Ryota SUZUKI | JPN | 2 Races |
| Yasunari SUZUKI | JPN | 2 Races |
| Yasuhiro SUZUKI | JPN | 10 Races |
| Filip SVAB | CZE | 28 Races |
| Christian SVANQVIST | SWE | 18 Races |
| Alexandra SVENDSEN | DEN | 2 Races |
| Erik SVENSSON | SWE | 20 Races |