u/Sorry-Adhesiveness82

I picked up a new board from FB marketplace, rode it for a bit and it all of a sudden started a very loud rattling noise. When spinning the wheel by hand, every full rotation also gives a “click noise” in the motor.

Does anyone know what could be the cause? I’ve never opened one of the motors so a bit hesitant to do so. The board did include a belt servicing pack. Videos attached show the rattling noise very clearly.

Thanks in advance!