I have an arducopter 2 and I can fly well with it but it roll a bit to right and pitch back a bit, i try to auto trim but after auto trim it goes many much more to right an too much to back and i don't know why. When i test motors in CLI mode i hear that the sound of the low right motor is low than others 3 motors and that the axis is a little bend. Is this motor damaged? I haven't done any crash. I try to calibrate esc in manual and auto mode many times but it pitch back and roll to right always.
How can i do? I must change the motor?