Diagnosis
The motor hall sensor connectors are loose or the sensor itself is misaligned, causing the controller to lose sync with the motor position.
How to Fix It
Check and reseat the motor cable connection. It's a 9-pin connector where the cable enters the deck near the rear wheel. Disconnect it, inspect for bent pins, clean with isopropyl alcohol, and reconnect firmly. Ensure the cable isn't pinched.
If That Didn't Work
The clicking could be physical: check the rear fender mounts and the rear brake caliper for looseness. Also ensure the motor axle nuts are tight.
Heads Up
Do not continue riding with a persistent clicking under load—it can indicate a failing motor bearing or hall sensor, which can lead to a sudden loss of power.