ElectricScooterParts.com Support Center

When the controller makes a clicking sounds and the motor does not run that usually points towards an old or worn out battery pack or a charging system problem. You can check the battery indicator lights on the throttle to see if they show a full charge and if they go down when the throttle is engaged. If the battery indicator lights go down when the throttle is pressed that indicates a problem with the battery pack or charging system. 

To test the charging system, if you have a multimeter you could see if the battery pack Voltage starts to slowly increase when the charger is plugged into the go-kart, or you could charge the go-kart overnight and see if it runs better the next day. If the charging system tests good and the battery Voltage still goes down when the throttle is pressed that points towards a problem with the battery pack.

A low battery pack could cause the motor to lug and overheat so we would start with testing the battery pack and charging system and make sure they are both good before looking into replacing the motor or controller. 

Please let us know how it goes and we can take it from there.

It is the nature of controllers to either work normally or to not work at all, with nothing in between these two stages of their lifespan. So that would point towards the motor starting to go out since the controller is working.

If the motor overheated and started to smell like burnt electronics when it should not have, then that could be a sign that the motor has a burned out coil winding and is on its way out. Burned out coil windings get worse and worse over time until the coil's resistance gets so low that the motor demands so much current from the controller that the controller overheats and burns out.