I know it's been a while but maybe handy for others in the future so here is the speedo wiring for Aussie 450X and 250X 08/09 models
Pin 1: Black = +12V Batt
Pin 2: Green = Earth
Pin 3: Brown = +12V Ign
Pin 4: Green = Sensor (-)
Pin 5: Red/White = Sensor (+)
Pin 6: White = Sensor out
Pin 12: Purple = High Beam
Pin 13: Orange = Indicator (left)
Pin 14: Blue = Indicator (right)
Pin 20: Red = Ign Lamp
You can see where Pin 1 is in the attached pic (top right). Taken from the ADR wiring diagram. I also have the 450X diagram as a pdf if needed, although 250X is slightly different (I have both 250X and 450X)