| Manaka KUBOTA | JPN | 11 Races |
| Patrik KUCERA | CZE | 11 Races |
| Vojtech KUCERA | CZE | 8 Races |
| Martin KUCERA | CZE | 2 Races |
| Radoslav KUCEV | BUL | 11 Races |
| Norbert KUCZYNSKI | POL | 21 Races |
| Michal KUDLA | POL | 34 Races |
| Arnolds KUDRJAVCEVS | LAT | 2 Races |
| Attila KUGLER | HUN | 4 Races |
| Mariusz KUJAWSKI | POL | 31 Races |
| Rok KUK | SLO | 5 Races |
| Vilem KUKACKA | CZE | 14 Races |
| Oleh KUKHARYK | UKR | 42 Races |
| Liudmyla KUKLINOVSKA | UKR | 32 Races |
| Yauheni KUKSA | BLR | 1 Races |