Here is how to swap out the charging port on your DUO with a replacement
You will have gotten a kit with the following parts to perform this swap - they will be referred to with the same names as in the image below.
3mm Allen Key
Exacto knife/sharp blade
Hair Dryer/HeatGun/Lighter to shrink heat shrink
Step 1: Remove the Battery Lock
Remove your internal hidden battery and range extender battery if it's installed.
Hold the POWER button to turn on your display wit
Remove the screw circled below to take off the battery toggle switch
Remove the three screws circled below with a 3mm Allen Key
Then you can pull out the battery lock by sliding it down from the downtube cavity
You can now access the inside of the downtube and locate the charging port internally - pictured below.
You will need to remove any adhesive attaching the port to the bike here. First, try lifting it away with a flathead screwdriver. This should be enough to loosen it.
If you cannot remove it with a flathead try and loosen some of it with an exacto knife, razor blade or any other sharp implement. Take care while using these to not damage the frame or your fingers! When loosened try again with the flathead to remove.
With the adhesive removed you can undo the nut on the back of the charging port. Loosen and remove the nut and washer.
With the nut and washer no longer attached to the old charging port, you can pull it outwards from the bike frame and remove it.
Cut the wires off the old charging port - cut these as close to the old charger port as possible. See the image below.
Pull the end of the wires so you can access them in the downtube of the bike to attach replacement connectors.
Strip off 6mm/0.25" of insulation from the BLACK wire that was attached to the old charging port which goes to the bike/battery receiver.
Attach the PICO connector to the wire. The middle tabs need to be wrapped around the bare wire. The outer tabs will be wrapped around the insulation. Pinch the tabs with needlenose pliers to connect them in their corresponding locations. See the image below for an example of a correctly attached connector.
Note: If you received different connectors and am unsure of the procedure for connecting them reach out to Support for instructions.
Repeat the actions performed in Step 4with the RED wire.
Install the new charger port onto the bike. To do this first place the plastic port housing onto the outside plane of the hole in the frame
Next, put the charger port into this plastic port housing from the interior of the bike.
Slide the washer and nut onto the replacement charger port wire, then tighten the nut to attach the charger port to the bike. The charging port should now be attached to the bike.
Slide one piece of heatshrink onto the black wire on the newly installed replacement charging port. Attach the connector on the charger port's black wire to the PICO connector you installed on the black bike charging wire in Step 4. Then slide the heatshrink over this connection and heat it with a heat gun, hair drier or lighter to shrink the heatshrink down and insulate the connectors.
Slide the second piece piece of heatshrink onto the red wire on the newly installed replacement charging port. Attach the connector on the charger port's red wire to the PICO connector you installed on the red bike charging wire in Step 5. Then slide the heatshrink over this connection and heat it with a heat gun, hair drier or lighter to shrink the heatshrink down and insulate the connectors.
Now your new charging port should be connected to the bike.
Reinstall the battery lock by reversing the procedure you followed in Step 1.Your charger port is now successfully replaced on the bike.
If you are having trouble, please submit a support ticket using the same email you placed your order under. Please note in the ticket your Biktrix order number, the trouble you are experiencing and include photos of the issue.