If you have this issue ignore the previous posts and follow these steps with the vehicle battery disconnected and the radio turned OFF.
1) Hold TR4 switch in the direction indicated.
2) Move and hold throttle trigger to full reverse.
3) Hold both switches in these positions and press the power button to enable factory mode.
4) With factory mode enabled select "sticks calibration"
5) Follow the onscreen instructions and press the "back" arrow twice. The radio will restart and you should see this screen with throttle at zero.
