| | Team Constructor Motorcycle Tyres No Rider Rounds |
| | Camel Yamaha Team Yamaha Yamaha YZR-M1 M 5 Colin Edwards All |
| | Camel Yamaha Team Yamaha Yamaha YZR-M1 M 46 Valentino Rossi All |
| | Konica Minolta Honda Honda Honda RC211V M 6 Makoto Tamada All |
| | Tech 3 Yamaha Yamaha Yamaha YZR-M1 D 7 Carlos Checa All |
| | Tech 3 Yamaha Yamaha Yamaha YZR-M1 D 77 James Ellison All |
| | Team Roberts Team Roberts KR211V M 10 Kenny Roberts, Jr. All |
| | Ducati Marlboro Team Ducati Ducati Desmosedici GP6 B 15 Sete Gibernau 1–7, 10–11, 13–16 |
| | Ducati Marlboro Team Ducati Ducati Desmosedici GP6 B 65 Loris Capirossi All |
| | Ducati Marlboro Team Ducati Ducati Desmosedici GP6 B 66 Alex Hofmann 8–9, 12 |
| | Ducati Marlboro Team Ducati Ducati Desmosedici GP6 B 12 Troy Bayliss 17 |
| | Kawasaki Racing Team Kawasaki Kawasaki Ninja ZX-RR B 17 Randy de Puniet All |
| | Kawasaki Racing Team Kawasaki Kawasaki Ninja ZX-RR B 56 Shinya Nakano All |
| | Kawasaki Racing Team Kawasaki Kawasaki Ninja ZX-RR B 8 Naoki Matsudo 15 |
| | Rizla Suzuki MotoGP Suzuki Suzuki GSV-R B 21 John Hopkins All |
| | Rizla Suzuki MotoGP Suzuki Suzuki GSV-R B 71 Chris Vermeulen All |
| | Rizla Suzuki MotoGP Suzuki Suzuki GSV-R B 64 Kousuke Akiyoshi 15 |
| | Repsol Honda Team Honda Honda RC211V M 26 Dani Pedrosa All |
| | Repsol Honda Team Honda Honda RC211V M 69 Nicky Hayden All |
| | Honda LCR Honda Honda RC211V M 27 Casey Stoner All |
| | Pramac d'Antin MotoGP Ducati Ducati Desmosedici GP5 D 30 José Luis Cardoso All |
| | Pramac d'Antin MotoGP Ducati Ducati Desmosedici GP5 D 66 Alex Hofmann 1–7, 10–11, 13–17 |
| | Pramac d'Antin MotoGP Ducati Ducati Desmosedici GP5 D 22 Iván Silva 8–9, 12 |
| | Fortuna Honda Honda Honda RC211V M 24 Toni Elías 1–8, 10–17 |
| | Fortuna Honda Honda Honda RC211V M 33 Marco Melandri All |
| | Fortuna Honda Honda Honda RC211V M 84 Michel Fabrizio 9 |
| | Ilmor SRT Ilmor Ilmor X3 M 8 Garry McCoy 16–17 |
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