How to Bleed the Brakes on a 2006 Honda CB919F

Shop parts for a 2006 Honda CB919F - 919 Motorcycle.

The 2006 Honda CB919F—the 919—uses hydraulic disc brakes at both ends, with separate front and rear circuits. It is not an ABS or linked-brake model, so the job is straightforward: refresh the fluid and remove air from the front lever circuit and the rear pedal circuit independently. This MotoSport.com guide walks through the job in a safe order, with checks that help you confirm the brakes are ready before you ride.

When a 919 Needs a Brake Bleed

Bleeding is due when the front lever or rear pedal feels spongy, when the lever pulls closer to the grip than it used to, or when the fluid in either reservoir looks dark or cloudy. It is also required after any work that opened the hydraulic system, such as new brake lines, caliper service, or master cylinder work. Even without symptoms, brake fluid absorbs moisture over time, which lowers its boiling point and can contribute to brake fade under hard use. Many riders refresh the fluid on a regular schedule as preventive maintenance.

Gather the Right Supplies Before You Start

  • Fresh brake fluid of the type marked on the master cylinder reservoir cap, from a sealed container
  • A box-end wrench that fits the bleeder valve
  • Clear tubing that fits snugly over the bleeder valve
  • A catch bottle for old fluid
  • Rags or shop towels
  • A syringe or turkey baster for removing old fluid from the reservoir
  • A screwdriver or driver that fits the reservoir cap screws
  • Optional: a one-way check-valve bleeder or vacuum bleeder to make one-person work easier

Use only fresh fluid from a sealed container, and do not mix fluid types. Check the reservoir cap for the specified fluid type before opening anything.

Set Up the Bike and Protect the Finish

Support the 919 securely upright on a stand so it cannot tip while you work. Turn the handlebars so the front reservoir sits level before you open it. Cover painted surfaces, plastics, and the instrument area with rags, because most brake fluids damage paint and plastic on contact. If a spill happens, wipe it up immediately and rinse the area with water.

Front Brake Bleed, Step by Step

  1. Remove the front reservoir cap and diaphragm. Use a syringe or turkey baster to remove most of the old fluid from the reservoir, but do not let the reservoir run dry.
  2. Refill the reservoir with fresh fluid of the type marked on the cap. Keep the fluid level above the low mark throughout the job.
  3. Attach the clear tubing to a front caliper bleeder valve and route the other end into the catch bottle. Position the box-end wrench on the bleeder.
  4. If your bike has more than one front caliper, work one caliper at a time. As a general rule, start with the caliper farthest from the master cylinder if the layout gives you a clear choice, then repeat the process on the other caliper.
  5. Squeeze the front lever slowly and hold it. Open the bleeder about a quarter turn to let fluid and air escape. Close the bleeder before releasing the lever. Never release the lever while the bleeder is open.
  6. Repeat the squeeze-hold-open-close-release sequence. Check the reservoir often and top it off so it never draws air into the system.
  7. Continue until fresh, clean, bubble-free fluid comes through the tubing. Keep the reservoir above the low mark as you work.
  8. If there is another front caliper, repeat the same procedure on it. Top off the reservoir when finished.

Rear Brake Bleed, Step by Step

  1. Open the rear master cylinder reservoir, remove most of the old fluid, and refill with fresh fluid of the type marked on the cap.
  2. Attach the clear tubing to the rear caliper’s bleeder valve and route it into the catch bottle. Fit the box-end wrench to the bleeder.
  3. Press and hold the rear brake pedal. Open the bleeder about a quarter turn, let fluid and air escape, then close the bleeder before releasing the pedal.
  4. Repeat the press-hold-open-close-release sequence, topping off the rear reservoir as needed so it never runs dry.
  5. Continue until the fluid in the tubing is fresh, clean, and free of bubbles.
  6. Tighten the bleeder snugly without overtightening, then fill the reservoir to the correct level marking.

Finishing Up and Checking for Leaks

Reinstall the diaphragm and cap on each reservoir. Tighten each bleeder snugly without overtightening. Clean any spilled fluid from the calipers, lines, and surrounding parts. Check for leaks at the bleeder valves and at the banjo fittings. Pump the front lever and rear pedal a few times, then hold steady pressure on each to confirm they feel firm and consistent.

Test Before Riding

The lever and pedal should feel firm and consistent, not spongy, and should not slowly sink under steady pressure. Spin each wheel to confirm the brakes are not dragging. Test the brakes at low speed in a safe area before riding normally. If anything feels soft, inconsistent, or weaker than before, stop and investigate before heading out.

Troubleshooting and When to See a Shop

If the lever or pedal will not firm up after several bleeding attempts, or if it firms up only after pumping, air is likely still in the system. Persistent bubbles can also point to a loose bleeder, a tubing fit that is drawing air, or a leak. Fluid leaking from the master cylinder, caliper, or fittings means the bike should not be ridden until it is repaired. Because this 919 is not an ABS or linked-brake model, you do not need a dealer-level ABS bleed procedure; if the brakes still will not firm up, have a shop inspect the master cylinder, calipers, and lines.

Related Shopping Categories

Shop Brake Fluid for a 2006 Honda CB919F - 919 Motorcycle.

Shop Brake Lines for a 2006 Honda CB919F - 919 Motorcycle.

Shop Brake Pads for a 2006 Honda CB919F - 919 Motorcycle.

Shop Stands for a 2006 Honda CB919F - 919 Motorcycle.

Shop Brake Tools for a 2006 Honda CB919F - 919 Motorcycle.

Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.