This guide walks you through removing and replacing the controller on your Ariel Rider e-bike. The replacement process is the reverse of removal, so the same steps apply in reverse order when installing a new controller.

For installation instructions please skip to the second section of this article.

NOTE: Before any maintenance or repair on this bike remove both batteries from the bike and ensure the bike is fully powered down before doing any work. 

You can also follow along with this video:

Tools Required

• 2.5 mm hex wrench

Removing the Controller

1. Remove the Seat
   Remove the seat from the bike to gain access to the frame components.
   
2. Remove the Batteries
   1. Remove the top tube battery.
   2. Remove the down tube battery from the underside of the frame.
3. Access the Bottom Bracket Cover
   From below the bottom bracket, locate the cover held in place by four screws. This cover houses all the connectors from the controller and the battery balancer.
   Remove the plate using a 3 mm hex wrench.
4. Disconnect the Battery Balancer
   Pull out the battery balancer and disconnect its connectors.
5. Disconnect All Remaining Connectors
   Disconnect all other connectors inside the bottom bracket cover area.
6. Free the Controller
   1. Clip the zip ties on the motor cable that are holding the controller in place.
   2. Unscrew the motor connector and pull it apart.
7. Remove the Seat Post Cover
   Remove the four screws from the cover behind the seat post using a 3 mm hex wrench.
8. Slide Out the Controller
   Carefully slide the controller out of the frame, making sure the cables do not snag as it comes out.
   Remove the two screws holding the controller to the tray using a 3 mm hex wrench.

Installing the Replacement Controller

Steps:

1. Begin by removing the seat.
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2. With electrical tape, loosely bundle and wrap the cables from the controller and DC to DC converter on the controller assembly carrier behind the seat post.
3. Drop the cable bundle into the controller compartment while sliding the carrier into the frame.
4. Once you can reach the cable bundle, guide them out the bottom of the bike.
5. Then remove the electrical tape.
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6. Pull the cables through only the space that the access panel covers.
7. Get all the connectors connected to their matching pairs.
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8. Then feed the excess cables into the frame.
9. Make sure none of the cables will get caught under the cover when securing it to the access panel space in the frame.
10. Using a 2.5 mm hex wrench, put the four M5 bolts, lock washers, and washers back into the cover.
11. With the cover in place, tighten the bolts down to 3 Newton meters.
12. Using a 2.5 mm hex wrench, put the four M5 bolts, lock washers, and washers back into the carrier assembly cover, making sure the rubber seal is aligned correctly.
13. With the assembly in place, tighten the bolts down to 3 Newton meters.
14. Return the seat post clamp and seat then clamp securely.

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