How To Bleed 2009 Honda VFR800FI - Interceptor ABS Motorcycle Brakes

Bleeding the Brakes on a 2009 Honda VFR800FI Interceptor ABS

Know What You're Working On

The 2009 VFR800FI Interceptor ABS runs hydraulic disc brakes at both ends, so this job covers the front lever circuit and the rear pedal circuit. The ABS badge on the bodywork is not decoration: this bike carries an anti-lock system, and the ABS-equipped VFR also uses a combined braking layout in which the rear pedal applies a share of front braking. That matters for bleeding in two ways. First, the system has more bleed points than a plain caliper-and-master-cylinder setup, and the order in which you open them is not arbitrary. Second, if air has migrated into the ABS modulator or the combined-brake proportioning hardware, a simple pump-and-bleed at the calipers will not push it out.

For a routine fluid refresh with a system that has stayed sealed, working through the caliper bleeders is the normal approach and is well within reach of a careful home mechanic. If the reservoir has run dry, a line has been opened, or the ABS unit has been disturbed, stop and read the last section of this article before you start.

Why and When to Bleed

Brake fluid is hygroscopic — it pulls moisture out of the air over time. Moisture lowers the fluid's boiling point, and a boiling fluid creates vapor, which is compressible. That is the mechanism behind a lever that goes soft on a long downhill or after repeated hard stops. Even a VFR that feels fine can benefit from a periodic flush, because the degradation is invisible until it isn't.

Bleed when the lever or pedal feels spongy, when the lever comes back closer to the grip than it used to, when the fluid in the sight glass or reservoir looks dark or cloudy, or after any work that opened the hydraulic system — new lines, caliper service, master cylinder work. A lever that firms up only after several quick pumps is a classic air-in-the-system symptom.

Tools and Supplies

• Fresh brake fluid of the type printed on the master cylinder reservoir cap, from a sealed container
• A box-end wrench that fits the bleeder valve snugly
• Clear tubing sized to grip the bleeder tightly
• A clear catch bottle with a little fluid in the bottom
• Rags or shop towels, plus a syringe or turkey baster for pulling old fluid out of the reservoir
• The correct driver for the reservoir cap screws
• Optional: a one-way check-valve bleeder or a vacuum bleeder, both of which make a solo job easier

Set Up and Protect the Bike

Get the VFR upright and stable on a stand so it cannot tip while you are leaning on the lever. Turn the handlebars until the front reservoir sits level — a tilted reservoir traps air at the cap end and lets fluid spill past the diaphragm. Drape rags over the tank, the fairing panels, the instrument cluster, and anything else below the reservoir and calipers. Brake fluid attacks paint and clear plastic on contact, so wipe any drip immediately and rinse the area with water rather than rubbing it in.

The Bleeding Procedure

1. Remove the reservoir cap and diaphragm. Use the syringe or baster to draw most of the old fluid out of the reservoir, leaving the bottom covered so you do not push air into the master cylinder.
2. Top the reservoir with fresh fluid from the sealed container.
3. Push the clear tubing onto the bleeder valve and route the other end into the catch bottle, submerged in the fluid already there.
4. Squeeze the lever and hold it, or press and hold the pedal. Do not release it yet.
5. Open the bleeder about a quarter turn. Fluid and air will push out through the tube. Watch the tube, not the reservoir.
6. Close the bleeder before you release the lever or pedal. Releasing with the bleeder open draws air back in through the valve.
7. Release the lever or pedal slowly and repeat. Keep checking the reservoir and topping it off — if it runs low enough to draw air, you have added a problem instead of removing one.
8. Continue until the fluid coming through the tube is clean and free of bubbles, then close the bleeder and move to the next point.

If your bike has two front calipers, bleed each one in turn rather than trying to do both at once. As a general practice, start with the caliper farthest from the master cylinder and work toward the closest, and on a combined system confirm the correct order for your bike before you open anything — the sequence is not the same as a conventional setup.

Finishing Up

Tighten the bleeder snugly with the box-end wrench. Snug is enough; overtightening can damage the seat and create a leak. Fill the reservoir to the level marking, reinstall the diaphragm and cap, and wipe down every surface you touched. Check the bleeder and the banjo fittings at the master cylinder and caliper for weeping, then squeeze the lever and hold pressure while you look again.

Test Before You Ride

The lever and pedal should feel firm and consistent, and should not slowly sink while you hold steady pressure. Spin each wheel by hand to confirm the brakes are not dragging. Then find a safe, empty area and test at low speed before riding normally.

When to Take It to a Shop

If the lever will not firm up after several rounds, if bubbles keep appearing, if fluid is leaking from the master cylinder or a caliper, or if you suspect air entered the ABS unit or the combined-brake hardware, hand the bike to a shop. Clearing air from an ABS modulator generally requires a dealer-level procedure or diagnostic tool, and a combined system's bleed sequence is easy to get wrong. A firm, reliable lever is the only acceptable outcome.

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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.