My MPH is Way Off When I'm Driving
This is caused from your sensor being screwed in too tight or the sensor is defective. To check this, the sensor will either be located in the front or the rear of the unit in the shaft. It will be plugged in the rear on the 500 an 700 and in the front on the 800. Find the shaft; on the back farthest from the motor, you will find a gold-fitted sensor screwed into the motor. Make sure this ;sensor is not screwed in too tight or to loose. Check your MPH again, if it is still screwed up, then you probably have a bad sensor and need to get another one.