i believe i have a bad motor when ever i try to yaw right the hexacopter pitches foward yaw left is ok. its been flying fine for a year+ just started recently the all start and stop same time with no props on

It might not be the problem of the motor, you can check the spinning of the motors without propellers. Try to calibrate the IMU using the software, adjust the load and position to ensure the aircraft is balanced.

ya make sure everything is centered even after a slight crash