A few things can cause error 25, if you are out on a ride and this happens, please use the quick fix below. You can further adjust and troubleshoot after your ride. 

  • Holding either brake lever while the bike is powering up.
  • A damaged brake lever
  • A brake lever needing service, not returning to resting position
  • Sensor needs adjusted.
  • Sensor needs replaced. 


QUICK FIX (700 Series only)

First make sure the brake lever is returned to the neutral position and power the bike off and on. 

If the issue persists If you are out on a ride, and need to get back home, you can disconnect which ever sensor wire that is causing the error code. You can keep the other one connected, which will still cut power to the motor when that specific brake lever is pulled.

The sensor wires connect just inside the rubber grommets (as shown below) on the left and right of your bike. Please trace the wire from the brake, when you disconnect it, the end of the wire should be RED. If it is another color, you have disconnected a different component. Disconnecting the sensor that is throwing the error 25 code will restore power to the motor and allow you to continue your ride or ride home. You may need to cycle the display off/on between disconnecting.





If the issue persists we will want to first identify which sensor is causing the issue. Carefully disconnect each sensor 1 at a time and see if the error persists.



If only one brake is causing the error, you can test check this by turning on the bike and leaving the error causing brake disconnected. Then carefully adjust the screw for the brake that is working properly a couple of turns and see if the error appears on the screen. Then adjust it back to its original position and see if the error is corrected with the bike on, or if it has to cycled on and off to clear the error.

The picture above has each screw labelled. 

  1. The screw labeled 1 is the set screw and holds the screw labeled 2 in place to avoid it moving over time. It is rather small, you might be able to just loosen it, if you remove it, please do not lose it.
  2. Screw 2 adjusts the position of the sensor - At this time you would not want to remove it completely, if you do, be careful as there is a small spring inside.
  3. Screw 3 adjusts the position of the lever, which also plays a role. I think it is best to mirror the other side for now.


You can compare the left and the right, and see if the lever screw was adjusted differently as well as the sensor screw. Are they all at similar depths?


  1. Loosen the set screw so you can adjust the sensor screw in and out as needed.
  2. Please reconnect your right side brake sensor. See if the error is still present. 
  3. If it is, please turn off the bike and adjust the sensor screw inward 2 clockwise turns. Then turn on the bike and see if the error is present.
  4. If it is still present, turn off the bike, please adjust the screw 2 clockwise turns. Then turn on the bike and see if it is still present.
  5. If that does not resolve it, please turn it 4 counter clockwise turns. Then begin the process in reverse. turn it 2 counter clockwise turns and turn on the bike to see if the error is gone.
  6. If it is still present, please turn the bike off. Turn it 2 counter clockwise turns and then turn the bike on to test it.