Credit: Tom Zartler

BUYING A USED ONYX

When buying a used ONYX RCR, ask if the bike and battery were stored indoors or outdoors, especially during the winter, as indoor storage is better for both. Inspect the frame for rust, cracks, dents, or crash damage. Check the battery compartment for rust or modifications, and ensure the spokes are tight. Examine the welds and paint for signs of stress.

A well-maintained bike should have minimal rust and a clean, well-cared-for appearance. Also, inspect the condition of external electrical wiring, including any modifications around the motor phase wires, headlight, taillight, or aftermarket electrical parts.

Pro tip: Have the seller ride the bike to demonstrate the functionality of the taillights, headlights, turn signals, and regenerative braking. Ensure it runs smoothly without strange noises. Switching the odometer from MPH to KM/H can help reveal if it has been reset.

Ask Seller:

  • Two key fobs
  • Two wood cover keys
  • 5 amp or 10 amp Charger
  • Proof of purchase paper or email
  • Does the BMS app have a password

Switch Odometer from MPH to KM/H

In normal display mode, press and hold the “SET” button (bottom left button) for 10 seconds to switch from “km/h” to “MPH.” Release the button, then press and hold the “SET” button (bottom left button) for another 10 seconds to switch back from “MPH” to “km/h.”

ONYX RCR BATTERY

Download the ONYX RCR Battery BMS app beforehand to connect to the battery yourself. Ensure the battery has been stored indoors, especially during winter, and inspect its physical condition.

ONYX 45AH BATTERY BMS APP

ONYX 41AH BATTERY BMS APP

BMS APP Screenshot Example

The BMS app should show a balance delta between 0.005V and 0.080V, as illustrated by the 0.0012V in the screenshot. The BMS info screen should display readout numbers similar to those in the screenshot.

regular

Charger

Ensure the charger is functional and appropriate for the battery.

Motor

Listen for any unusual noises or grinding sounds from the motor. Inspect the hub motor wires for wear, damage, or improper repairs, especially if the bike has been modified or previously repaired.

Controller

Verify the controller’s amp limit to ensure it matches the advertised specifications, as many used bikes may have aftermarket controllers installed.

Suspension

Compress the suspension to ensure it’s responsive and not leaking oil.

Brakes

Test the brakes for responsiveness and noise. Inspect the brake pads and rotors for wear.

Electrical System

Inspect all wiring for fraying, cuts, or improper splicing. Check for loose or messy connections around the ONYX RCR. Sloppy wiring modifications often indicate that internal wiring may have been improperly altered.

Throttle and Display

Ensure the throttle and display are responsive and functioning correctly.

Tire Condition

Inspect the tires for wear cracks or punctures. Verify the size and type of tires stock Mita, Michelin, or Vuro 2.75" or 3.00" x 17" or aftermarket.

Wheels and Spokes

Spin the wheels to check for wobbling or bent rims. Inspect the spokes for tightness and condition.

Aftermarket Parts

Ensure any modifications, such as upgraded controllers, batteries, or suspension, were done professionally. If the motor has been replaced or repaired, such as in hub wiring, verify that the work was completed correctly.

Controller Tuning

Ask if the bike has custom tuning and whether it aligns with your intended use.

Handling

Take the bike for a test ride to ensure it handles smoothly and comfortably, paying attention to any unusual noises or vibrations.

Top Speed and Torque

Test the bike’s top speed and torque delivery in Sport mode.

Ownership

Make sure the seller provides proof of ownership or a bill of sale.

Maintenance History

Inquire about the maintenance history, including battery care, tire replacements, and any electrical repairs.