Pro Action Replay Codes:
Infinite Time - 00C2A1:00

Game Genie Codes:
Don't lose speed on grass - 00A-C6C-E62 -Galoob
Always travel at max speed - 3EA-C3C-08A + FFA-C4C-E62 -Galoob
Start with very little bike energy - 058-49C-916 -Galoob
Start with mega bike energy - FF8-49C-916 -Galoob
Infinite bike energy - 213-054-91D -Galoob
Biker information disappears - 001-24A-A2C -Galoob
Infinite time - 00D-B5E-E6E -Galoob
Inflict more damage when you punch other bikers - 3EE-9A5-4CA + 00E-9B5-F7A -Galoob