how to remove disc brake rotors on the rear of an AU Series 1? please!
i need to remove and replace with new rotors and pads?

When I did mine, I removed the caliper and then took out the screw that holds the Disc on, took the disc off and that was it. You may need an Impact screwdriver to get the screw out.

Just make sure you don't leave the caliper hanging in the breeze, hoses don't like that. Make sure you CLEAN things too like Caliper slides and such before you reassemble.