How did you get that outer race out of the motor case?Take the motor apart, you should be able to tell if it’s garbage. You might get lucky!??This happened to me on one of my blx 2400kv motors, pinion side bearing in three pieces.
About the black/grey dust inside the power module. I also couldn’t figure out at first where it was all coming from. It’s the slipper hitting the inside. I shimmed mine to keep it off the inside and no more dust!??
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