In the main menu, enter the following cheats:
Moto GP 07: codes (track, uniform, trials) [X-360] Free Download
[right], [up], B, A, B, A, [left], [down], Y – open all challenges
[right], [up], B, Y, [right], [up], B, Y, [right], [up], B, Y – open all championships
[right], A, [left], [left], Y, [left], A, [down], Y – open all uniforms
[right], [up], B, B, A, [down], [up], B, [down], [up], B – unlock all riders
[left], A, [right], [down], Y, B, A, B, Y – open all tracks