To unlock these cheats enter the code at the code screen:

Effect: Code

Cheat Mode: SOMONEY
All Bikes: FACTORY
All Characters: FULLHOUS
No Bike: sqatter
Unlimited Boost: lazyridr
All Outfits: hookedup
All tracks: buspass
Moon Gravity: ftail
Flaming Bike: firesale
Slow Motion: wtchkprs
All Riders: populate