All Championship Races
At the main menu, press Square, Triangle, Left, Left, Circle, Circle, L, R, R, Triangle to unlock all championship races.
All Bikes except Fury
At the main menu, select "Options," choose "Player Profile," then select the "Enter Cheat" option. Enter "All Access" as a code to unlock all bikes except for the Fury.
All Rider Gear
At the main men...