• the pads is so worn out that the auto align does not work.

    Maybe

    rotor slighty warped.

    Nope, wheel wasn't spinning so it was definitely one of the pads hitting the disc earlier than the other

    calipers not lined up to the rotor properly.

    Possible. I didn't build it, I just threw it together. Not sure how to check.

    I reckon first thing is to pull the wheel and check the pads.

  • You've centred the rotor haven't you? If not, loosen the mounting bolts, pull and hold the brake lever, then tighten the bolts to get the rotor centred.

  • I've not touched anything yet. Waiting until the weekend so I have more time for it all to go tits up. But thanks for the tip. I think checking pads is first step.

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