Ranger/FreeRider/Challenger/X-Force: Jerky motor start

Our controllers work with the motor’s Hall effect sensors to see the position of the rotor, so You can have hard acceleration immediately. They are only used in the initial acceleration of the motorcycle and if the Hall effect sensors fail, the controller will still be able to find the position of the motor. However, You might experience a jittery and jerky start for the first meter, until the motor starts spinning. If You push the motorcycle from a standstill, the motorcycle will behave normally. Fortunately, as well as functioning without a Hall effect sensors, our controller is also capable of recalibrating them.

Follow these steps to recalibrate the Hall effect sensors:

Required tools:

cutting plier
brush
technical alcohol
compressed air source with moisture separator
isolating tape or shrinking tube

Make sure, that the magnetic kill switch is in OFF position (magnet NOT attached).
Place the motorcycle on a solid and level surface of a mounting stand, so that both wheels are on the ground.
Each 48 V motor has 4 cables: 3 phase cables and 1 sensor cable. Using a cutting plier cut the zip tie, securing the cable to the frame.
Using a cutting plier very carefully cut the shrinking tube on the sensor cable to uncover the connectors.
Disconnect the sensor cable from the motor and inspect both 6-pin connectors for any debris.
Clean both connectors properly with a brush, technical alcohol and pressurized air.
Reconnect the sensor cable to the controller and use an insulating tape or new shrinking tube to isolate it and a zip tie to.

CAUTION!
Do NOT overheat the any cable or its connectors.
Use Your left hand to hold the torque mode select button.
Use Your right hand to twist the accelerator to full.
Turn the motorcycle ON by attaching the magnet to the magnetic kill switch - the motorcycle will turn on as usual and beep three times.
Continue to hold the torque mode select button and the accelerator in place - there will be a pause and another beep and the LED will flash red.
Wait 2 seconds, then release the torque mode select button.
Release the accelerator and wait.
If You'll hear a high pitched beeping, the calibration process started successfuly. The rear wheel will rotate in both directions in small increments, spin for a few seconds and then the motorcycle will behave normally.

If Your motorcycle is under warranty, please register it on our website, if You have not already done so:
https://www.kuberg.com/en/bike-registration

If the problem persists, please contact Your dealer or KUBERG customer service (support@kuberg.com). For the fastest possible resolution please send:

VIN of Your motorcycle (it is stamped on the right side of the steering column).
Detailed information on actions taken so far, a few photos and preferably a video.

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Ranger/FreeRider/Challenger/X-Force: Jerky motor start

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