7XL Getting Hot

[Dafni]

If you ran the same setup for a long time without any heat issues, something is definitely wrong. Binding would indeed be the first thought. Are you really sure the drivetrain is as smooth as ever? If yes, there might be a damage to the motor, such as windings getting their insulation ripped off from bouncing wires.
A bad motor bearing could also be the cause.

I ran the same setup, 7XL on 1 cells, 22/60 gearing, stock diffs, btw.

The factory settings of the BK controllers on timing is 15 degrees.