Using Wii Mote & Nunchuck

+ Button: Pause
Analog Stick: Steer or Throw Items Back or Forward
A Button: Accelerate
B Button: Drift (Manual mode)
Z Button: Use Item
C Button: Reverse Look
Flick Wiimote Up: Trick or Wheelie (using bike Only)

Instructions

Using the Wii Wheel:

Wii Wheel
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+ Button: Pause
Turn: Steer left or right
Flick Up: Trick or Wheelie (Bike Only)
2 Button: Accelerate
1 Button: Brake or Reverse
B Button: Drift (Manual mode)
A Button: Reverse look
D-Pad Up: Throw Item
D-Pad Down - Drop item