Issues with the pedal assist of your CF Racer1 can be frustrating. Luckily there are some simple things to check to get your bike back on the road again. This article will cover potential fixes for issues of inconsistent or non functional pedal assist on your CF Racer1.
Check the walk mode
The walk mode can be used as a good test to see if the electrical system on your bike is able to spin the motor. If you are unaware, here are the steps to use the walk mode on your bike:
- Turn the bike on and ensure it is on the main screen.
- Press and hold the "-" button on the grip.
- The motor should spin at about 1-3mph until and a walking man symbol will be shown on the bottom of display until you release the button
If the walk mode does not work properly on your bike you may want to check the electrical connection to the motor. Instructions for accessing the electrical connections on your bike can be found in this article: CF Racer1 Controller Access
Check the Cadence Sensor
The Cadence sensor of your bike is mounted to the drive side of the rear axle and sends a signal every time a cassette tooth passes by. This means that the placement of this sensor is very critical and can need to be adjusted after performing maintenance such as repairing a flat tire. Adjustments can usually be done by hand and here are some references for how the cadence sensor should look mounted on your bike.
- The sensor is the little black box right in front of the derailleur. The sensor should be straight and lined up with the derailleur hanger.
- The spacing between the sensor and the smallest cog on the cassette should be very close, about 2mm.
- The order of the hardware on the axle is very important for the spacing of the sensor. Please note that some bikes require two open ended washers for proper spacing. If your bike came with two washers, be sure to install both back onto the bike. These washers are standard Eclips that can be found from many online retailers.
Check your B Tension Derailleur adjustment
As mentioned above, the cadence sensor sends a signal every time a tooth of the small cassette cog passes by the sensor. If the chain is obstructing the sensor, it cannot read the cassette movement and will cause the assist to never or inconsistently engage. The way to resolve this is to tighten the B tension screw on the derailleur to allow for more room between the chain and the littlest cog. 
Final Notes
Usually issues with the PAS of the CF Racer1 can be resolved with these few checks. If you are still experiencing issues, feel free to reach out to our knowledgeable support team with videos showing the issue and the checks you have made for further assistance.
