Throughout ownership, all bicycle parts wear out, this is true even of the motor. The following article goes over how to replace the motor in the CFR1. Throughout this article, the term "stator" is used interchangeably with "motor". These terms refer to the same part: the gears and electronics that go inside the hub shell. 


Tools Needed-

  • Shimano/ Sram splined cassette tool without pin (Park Tool's FR 5.2 is one example of this)
  • Chain whip
  • Security torx 20 wrench. This link goes over the difference between torx and security torx: LINK
  • 15mm open-end wrench
  • Mallet (optional)


Preliminary Steps-

Before removing the motor, the wheel must be removed from the bicycle. We go over how to do this in the following articles:


1. This article goes over how to disconnect the motor from the controller inside the frame: CF1 Controller Access


2. Once the motor is disconnected, the entire wheel can be removed from the bicycle. This link goes over how to do this: CF Racer1 Roadside Flat Repair


Once the wheel is removed from the bicycle, it is ready for the motor to be installed and can be set aside till needed. The next step in preparing the project may be optional depending on how the motor arrives for installation. Some arrive preinstalled in a hub shell; others arrive ready to install with no hub shell. The following few steps outline how to prep the motor for installation should it be necessary. The photo below shows the motor and the hub shell. 



Should the motor need to be extracted from the hub shell, the following steps are required: 




Take care not to damage the motor cable when pulling the stator from the hub shell. Slower is better when removing the stator however, the motor cable can get stuck on the hub shell, should this happen, use one hand to hold the cable against the axle while removing. Once the stator is extracted it is ready to be installed into the wheel. 



Step 1: Remove Old Stator-

The first step to replacing the stator is going to be removing the old one. While it can be done after, it is advised to remove the cassette before removing the stator. The following link from Park Tool goes over this in exhaustive detail: LINK. 

The stator can be removed from the wheel via the following steps: 





Step 2- Install New Stator-

The installation of the new stator is simply the inverse of step 1. The new stator installs the same way the old one comes out. The following steps show this in more detail. There is one thing to note, the new stator will come with a plastic cap on the plug. Leaving this plug in place until the end can help protect the pins from being damaged during installation. While not necessary if one is careful, it can be helpful. 




After the stator is installed, the casstte can be reattached and the wheel reattached to the frame. We would suggest readjsuting the derialleur and brake after reintalling the wheel.