| Team |
Constructor |
No |
Rider |
Rounds |
| Telefónica Movistar Honda 250cc |
Honda |
1 |
Dani Pedrosa |
1–7, 9–17 |
| 73 |
Hiroshi Aoyama |
1–7, 9–17 |
| MS Aprilia Italia Corse |
Aprilia |
5 |
Alex de Angelis |
1–7, 9–17 |
| 24 |
Simone Corsi |
1–7, 9–17 |
| Würth Honda BQR |
Honda |
6 |
Alex Debón |
1–7, 9–17 |
| 14 |
Anthony West |
7 |
| 33 |
Arturo Tizón |
15–17 |
| 64 |
Radomil Rous |
1–6, 9–14 |
| Aprilia Aspar 250cc |
Aprilia |
7 |
Randy de Puniet |
1–7, 9–17 |
| 19 |
Sebastián Porto |
1–7, 9–17 |
| Abruzzo Racing Team |
Aprilia |
8 |
Andrea Ballerini |
1–7, 9–17 |
| Campetella Racing |
Aprilia |
9 |
Hugo Marchand |
1–6 |
| 25 |
Alex Baldolini |
1–7, 9–17 |
| 44 |
Taro Sekiguchi |
9–17 |
| 45 |
Michele Danese |
7 |
Team UGT Kurz
Team Kurz Prista Oil
Team Yamaha Kurz |
Yamaha |
12 |
Gábor Rizmayer |
1–7 |
| 16 |
Franz Aschenbrenner |
1–2 |
| 18 |
Frederik Watz |
3–6 |
| 22 |
Alexander Todorov |
7, 11–12 |
| 23 |
Nicklas Cajback |
9–17 |
| 26 |
Andreas Martensson |
9–10 |
| 63 |
Erwan Nigon |
13–17 |
| Aprilia Germany |
Aprilia |
14 |
Anthony West |
4 |
| 36 |
Martín Cárdenas |
1–3, 5–7, 9–17 |
| 57 |
Chaz Davies |
1–7, 9–17 |
| Red Bull KTM GP250 |
KTM |
14 |
Anthony West |
9–14 |
| Carrera Sunglasses - LCR |
Aprilia |
15 |
Roberto Locatelli |
1–7, 9–17 |
| 27 |
Casey Stoner |
1–7, 9–17 |
| Mototechnic Castrol Racing |
Honda |
16 |
Franz Aschenbrenner |
10 |
| Nocable.it Race |
Aprilia |
17 |
Steve Jenkner |
1–4, 6–7, 9–17 |
| 71 |
Jarno Ronzoni |
5 |
| Scuderia Fantic Motor GP |
Fantic |
20 |
Gabriele Ferro |
1–2, 4–7, 9–17 |
| 21 |
Arnaud Vincent |
1–2, 4–7, 9–17 |
| Kiefer-Bos-Castrol Honda |
Honda |
28 |
Dirk Heidolf |
1–5, 7, 9–17 |
| 63 |
Erwan Nigon |
6 |
| Matteoni Racing |
Aprilia |
32 |
Mirko Giansanti |
1–7, 9–17 |
| Team Scot |
Honda |
34 |
Andrea Dovizioso |
1–7, 9–17 |
| 55 |
Yuki Takahashi |
1–7, 9–17 |
| Equipe GP de France - Scrab |
Aprilia |
38 |
Grégory Leblanc |
1–7, 9–11 |
| 50 |
Sylvain Guintoli |
1–7, 9–17 |
| 56 |
Mathieu Gines |
12–17 |
Andalucia Mas Racing
Sebring Mas Racing |
Aprilia |
41 |
Álvaro Molina |
1–2, 5, 9–11, 17 |
| 42 |
Yves Polzer |
1–2, 5, 9–10 |
| ASMV Scaccia |
Yamaha |
47 |
Marc-Antoine Scaccia |
4 |
| Fortuna Honda |
Honda |
48 |
Jorge Lorenzo |
1–7, 9–12, 14–17 |
| 80 |
Héctor Barberá |
1–7, 9–17 |
| NRG Racing |
Honda |
52 |
Thomas Walter |
10 |
| Racing Team Benjan Motoren |
Honda |
53 |
Patrick Lakerveld |
10 |
| Team Yamaha China Tianjian |
Yamaha |
58 |
Huang Shi Zhao |
3 |
| 62 |
He Zi Xian |
3 |
| Chong Quing Yuan Xgjao Racing |
Honda |
59 |
Huang Zhi Yu |
3 |
| Zongshen Team of China |
Aprilia |
60 |
Wang Zhu |
3, 13, 16–17 |
| 61 |
Li Zheng Peng |
3–4, 13, 16–17 |
| 63 |
Erwan Nigon |
4 |
| Team Racer Bike |
Honda |
65 |
Samuel Aubry |
4 |
| Jaap Kingma Racing |
Aprilia |
66 |
Hans Smees |
7 |
| De Arand Filart Racing |
Aprilia |
67 |
Randy Gevers |
7 |
| MRTT Hugen Racing |
Yamaha |
68 |
Jan Roelofs |
7 |
| MVS Racing Team Mikcin |
Honda |
69 |
Mike Velthjzen |
7 |
| Sramek Racing Promotion |
Yamaha |
70 |
Michal Filla |
11 |
| Team Harc-Pro |
Honda |
75 |
Shuhei Aoyama |
12 |
| Team Moto Space |
Yamaha |
77 |
Mamoru Akiya |
12 |
| RT Morinokumasan Sato Jyuku |
Yamaha |
78 |
Ryuji Yokoe |
12 |
| Henkel Danke J Racing |
Yamaha |
79 |
Masaki Tokudome |
12 |
| Turramurra Cyclery Racing |
Yamaha |
81 |
Mark Rowling |
15 |
| BP Ultimate/ASF Printing |
Honda |
82 |
Mick Kelly |
15 |
| Dydo Miu Racing Team |
Yamaha |
93 |
Koki Takahashi |
12 |
| Arie Molenaar Racing |
Honda |
96 |
Jakub Smrž |
1–7, 9–17 |
|
| Key |
| Regular Rider |
| Wildcard Rider |
| Replacement Rider |
|