RX8+2050kV Buggy - Started coggind and doesn't run anymore

[Lauri]

Checked the motor and rotor - look like new (they are), didn't notice anything wrong there.

One more factory reset and still not working correctly. When I push the throttle VERY fast the motor spins up few hundred rpm and then rotates more and more slowly and keeps roteting very slowly without any torque - I press throttle 10% or 100%, same thing!

Where's the low-level reset button for ESC ;) ?

[Marvin]

That sounds more like a rotor failure to me (the 'no torque' thing puts me to this conclusion). If it was anything like my rotor failures, there won't be anything visibly wrong with it, until you try and move the magnets horizontally. If they move, it needs replacing.