RCR 80V Front Fork Top-Off Guide

RCR 80V Front Fork Top-Off Guide

This guide explains how to add fork oil to the front fork on the ONYX RCR 80V. 


Video created by Bryan Meyer, our 80v fork whisperer! 

Before You Begin (Safety First)

Before starting:

  • Work on a flat, stable surface.
  • Turn the bike off.
  • Make sure the bike is secure before loosening the fork caps.
  • Have a second person hold the bike steady while the front wheel is lifted.
  • Do not place your hands or feet beneath the front wheel while it is suspended.
  • Do not completely remove both fork caps unless the bike is properly supported.
  • If the bike becomes unstable at any time, safely lower it before continuing.

Tools & Materials Required

  • 19 mm wrench
  • Fork oil level tool or fork oil syringe
  • 15W fork oil
  • Small scissor jack

Note: Equivalent tools with the same specifications may also be used.

Step-by-Step Instructions

Step 1: Lift the Front Wheel

  1. Position the small scissor jack beneath the bottom service plate of the bike.
  2. Slowly raise the bike until the front wheel is approximately 5–10 cm (2–4 inches) off the ground.
  3. Verify the bike is stable before continuing.

Step 2: Loosen the Fork Top Caps

  1. Using the 19 mm wrench, loosen both fork top caps.
  2. Alternate between the left and right fork, loosening each gradually.
  3. Only loosen the caps enough to create space for the fork oil tool.

Do not completely remove the caps.

Step 3: Add Fork Oil

  1. Use 15W fork oil.
  2. Insert the fork oil tool into one fork tube.
  3. Add approximately 25 ml of fork oil.
  4. Repeat the process on the opposite fork.

Each fork leg should receive approximately 25 ml of 15W fork oil.

Important

Do not overfill the forks. Excessive oil can negatively affect suspension performance and ride comfort.

Step 4: Tighten the Fork Caps

  1. Carefully tighten both fork caps.
  2. Tighten each side evenly using the 19 mm wrench.
  3. Torque the fork caps to 25 Nm.

Step 5: Lower the Bike

  1. Slowly lower the scissor jack until the front wheel rests on the ground.
  2. Remove the jack.
  3. Compress the front suspension several times to circulate the new oil.

Step 6: Test Ride

Take a short, controlled test ride and verify:

  • The suspension feels smoother.
  • Fork movement is even.
  • Ride comfort has improved. 

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