Bafang Controller/ PAS Programming Guide – Biktrix

By proceeding with the following you are acknowledging that you are following these instructions carefully and in full. Biktrix is not liable for any changes being made resulting in corruption of the motor controller. Warranty may be void if you program your motor yourself. Check with a Biktrix technician before making undocumented changes to these settings.

Note: If you do not have a program to open .ZIP files on your computer visit the WinRAR website and download + install the following program.

Download the software from the link below the article in the attachment.

Extract the zip content to a folder and use the Controllerst.exe application;
Connect the USB plug on to your computer and the other end to the Umbilical Plug (Green) as shown in pics.
On the Device Manager please check if the COM port is read/ allocated to the device.
Inside the extracted software folder Right Click on .exe and ‘Run as Administrator’
Once the application is launched you would get a screen with some information like this on the 'BASIC' Tab. Note that the Read and Write Buttons are not True (clickable).
Click the Connect Button and if the connection is established the Read & Write Buttons will become True
On the Basic Tab, Click on Read Button and then you would get some new values listed, Click the Read Button again (as a safety)
The default Basic Tab on Swift should show this screen:
----------------------------------- Very Important Step ----------------------------------------
Click on File and then Click on Save as shown below;
Now give a name to your file as shown below and also note where this file is saved on the computer (take a screenshot/ picture from your cell phone of this screen)
If you want to REVERT back to your original settings, Click on File-->Load-->(Select the file that was saved originally)-->Click on Load-->Then click on 'Write' Button.
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Change the values as per the screenshot below, once all values are fed in click on the Write Button.
Next, click on the Pedal Assist Tab and change the values to as per the screenshot below (only applicable if the values are different) once all values are fed in click on the Write Button.
Next, click on the Throttle Handle tab and change the values to as per the screenshot below (only applicable if the values are different) once all values are fed in click on the Write Button.
Please DO NOT MODIFY ANY OTHER VALUE UNLESS INSTRUCTED BY BIKTRIX

Click the Close button and exit the application.
Disconnect the USB cable and very very carefully pull the Programming cable out of the Umbilical plug, be patient take your time.
DO NOT PULL FROM THE WIRES, PLUGS CAN FORM PARTIAL VACUUM AND CAN THEREFORE GET ‘LOCKED’, USE A CLOTH PIECE IF HANDS GET SLIPPERY OVER THE PLUG WHILE PULLING THEM OFF, DO NOT PRY USING A SHARP TOOL, BE PATIENT. Stop and retry if it doesn't come off in one go.