American Chopper: The Game cheats and cheat codes for XBox

Fast turns:
Hold Black to drift.

Turn when in a burnout:
PUsh R + A buttons.

Avoid losing 200 style points and damaging your bike:
If you play on the delivery boy stage, you can use rear brake (R)
to knock Cass off his bike. You can do with the front brake also.
You will get 150 style points.

Race against Iron Horse: 
Try to get close to as many cars as possible to earn additional 
75 style points for each car you passed without hitting. You can 
earn more points than Iron Horse.