Item # SPD-YK31C24 24 Volt 350 Watt Controller $34.95
Item # THR-35 Variable Speed Controller $19.95
Wiring Directions for the SPD-YK31C24 controller.
Here is a drawing showing how to wire the speed controller to the other components on the scooter:
I hope this information helps guide you in the right direction to repair the scooter. Please let me know if you have any questions.
Vincent Failla