On my 2000 Dutch Star, the Stewart Warner electric speedometer has gone goofy. It reads all over the place while driving. It will go from 85 to 0 to 35 and more while riding at about 60. I'm currently...
it could be the speed sensor on the tailshaft of the trans or the wiring near the connector. the vibration on the wire harness can cause a wire to break between the main harness and the sensor causing erratic operation also check the connection for corrosion also does the odometer register the correct millage if it does the speedo head is probably defective