| Results - 1/4 Finals | |||||||||||
| Heat | Rank | Bike | Name | NOC | Gate | Start | Turn_1 | Turn_2 | Turn_3 | Time | Mark |
| 1 | 1 | 100 | MAHIEU Romain | FRA | 8 | 2.263 | - | 18.539 | - | 32.784 | Q |
| 1 | 2 | 974 | MAYET Romain | FRA | 1 | 2.243 | - | 19.124 | - | 33.411 | Q |
| 1 | 3 | 3 | DE SOUZA FILHO Anderson Ezequiel | BRA | 3 | 2.247 | - | 19.302 | - | 33.584 | Q |
| 1 | 4 | 909 | KATYSHEV Aleksandr | RUS | 7 | 2.329 | - | 19.587 | - | 33.891 | Q |
| 1 | 5 | 815 | CLERTE Eddy | FRA | 4 | 2.377 | - | 20.303 | - | 34.250 | |
| 1 | 6 | 741 | ARBOLEDA OSPINA Diego Alejandro | COL | 6 | 2.236 | - | 19.939 | - | 34.276 | |
| 1 | 7 | 373 | BLANC Renaud | SUI | 2 | 2.267 | - | 20.461 | - | 34.862 | |
| 1 | 8 | 436 | MIR Amidou | FRA | 5 | 2.287 | - | 23.006 | - | 55.814 | |
| 2 | 1 | 1 | ANDRE Sylvain | FRA | 1 | 2.270 | - | 19.140 | - | 33.031 | Q |
| 2 | 2 | 29 | RENCUREL Jeremy | FRA | 3 | 2.240 | - | 18.778 | - | 33.174 | Q |
| 2 | 3 | 8 | VAN DER BURG Dave | NED | 6 | 2.261 | - | 19.465 | - | 33.731 | Q |
| 2 | 4 | 44 | DEAN Anthony | AUS | 2 | 2.251 | - | 19.535 | - | 33.963 | Q |
| 2 | 5 | 201 | GAROYAN Leo | FRA | 7 | 2.326 | - | 20.066 | - | 34.252 | |
| 2 | 6 | 34 | TESAR Cole | USA | 8 | 2.268 | - | 20.783 | - | 35.465 | |
| 2 | 7 | 42 | SCHIPPERS Jay | NED | 4 | 2.307 | - | 20.990 | - | 37.553 | |
| 2 | 8 | 120 | PELLUARD Vincent | COL | 5 | 2.263 | - | 19.928 | - | DNF | |
| 3 | 1 | 313 | KIMMANN Niek | NED | 8 | 2.252 | - | 18.817 | - | 32.862 | Q |
| 3 | 2 | 7 | GRAF David | SUI | 1 | 2.252 | - | 19.113 | - | 32.965 | Q |
| 3 | 3 | 11 | FIELDS Connor | USA | 4 | 2.238 | - | 19.309 | - | 33.794 | Q |
| 3 | 4 | 33 | DAUDET Joris | FRA | 7 | 2.247 | - | 19.488 | - | 33.910 | Q |
| 3 | 5 | 77 | SAKAKIBARA Kai | AUS | 3 | 2.254 | - | 19.641 | - | 34.229 | |
| 3 | 6 | 254 | RACINE Romain | FRA | 6 | 2.359 | - | 19.818 | - | 48.321 | |
| 3 | 7 | 269 | NAKAI Asuma | JPN | 5 | 2.327 | - | 19.836 | - | 1:03.285 | |
| 3 | 8 | 164 | ISIDORE Quillan | GBR | 2 | 2.315 | - | 20.048 | - | 1:22.982 | |
| 4 | 1 | 87 | WHYTE Kye | GBR | 3 | 2.248 | - | 19.276 | - | 33.176 | Q |
| 4 | 2 | 593 | CAMPO Alfredo | ECU | 1 | 2.225 | - | 18.880 | - | 33.215 | Q |
| 4 | 3 | 24 | SHARRAH Corben | USA | 6 | 2.256 | - | 19.521 | - | 33.610 | Q |
| 4 | 4 | 6 | EVANS Kyle | GBR | 2 | 2.241 | - | 19.656 | - | 33.918 | Q |
| 4 | 5 | 595 | MOLINA Gonzalo | ARG | 7 | 2.274 | - | 19.924 | - | 34.248 | |
| 4 | 6 | 40 | NAVRESTAD Tore | NOR | 4 | 2.333 | - | 20.548 | - | 34.925 | |
| 4 | 7 | 210 | DUBOIS Corentin | FRA | 8 | 2.315 | - | 20.242 | - | 35.084 | |
| 4 | 8 | 278 | RAMIREZ YEPES Carlos Alberto | COL | 5 | 2.267 | - | 23.607 | - | 1:14.370 | |