so i bought a madass 50cc today for $500. turns out the digital speedometer doesnt work. it just reads 0 mph even while im riding it. does anyone have any idea of how to fix this?
Trace the wires and get a voltmeter and check to see if the leads going to the speedometer are fucked or not. Check the wires first to see if they are even connected/grounded. If you're getting power to it and it still doesnt work then you need a new speedometer.