castle motor problem!

hello everbody,


i have question.
sunday during practising with my car, the motor, mamba monster 2200 KV brook down.
When I took a close look at it, I noticed that the something on the rotor has come loose.
I've taken a photo that shows clearly what's going on.
The car I drive is a LOSI 8 BUGGY 2.0 .
Gearing 15T/45T 4 sell lipo.4000mah 30c 50cburst
in motor ready for the trash ?
or can I still recover it?
does anyone have tips for me ,on the forum I can not find much about.

thank you!


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