A crude way to get around the voltage limitation would be to place a voltage regulator between the battery input and the B+ line going to the display that limits it to under 60V. The display has a voltage limitation as well as the controller logic.
This regulator would be placed in series with the BROWN wire going from the controller to the display. This line gets switched by the display unit and feeds pack voltage back to the controller. Normally this line supplies about 100mA when the motor is running.
This regulator would be placed in series with the BROWN wire going from the controller to the display. This line gets switched by the display unit and feeds pack voltage back to the controller. Normally this line supplies about 100mA when the motor is running.