Enter JIH345 as a password from the options menu. The only way to disable this
code is to reset the game; make sure to save your progress before doing so.
Also, this code will cause your bike's handling to decrease considerably at
higher speeds, and you will be more prone to bottoming out when landing. Be
careful if you plan on using it during your career.
Officer Dick and police bike:
Successfully complete all the Freestyle competitions.
Maggot and Slipknot bike:
Successfully complete Master Supercross.
Successfully complete the entire MX career.
Successfully complete the entire Freestyle career.