I have fitted a brain power controller and display to a Dawes Swift with a Dapu mid mount motor. The dawes speed sensor fits to the rear wheel and has 2 wires and the pedal assist is built into the motor and has 4 wires. I can only get the bike to run with a throttle and the speed displayed on the screen is only there when the motor is turning and is based on motor speed and not wheel speed. Is there any way to get the speed reading from the wheel and if the padal assist is faulty can it be fixed or replaced with some other type?