Bleeding the Hydraulic Brakes on a 2022 Honda ADV150
Shop parts for a 2022 Honda ADV150 Motorcycle.
When the ADV150 Needs a Brake Bleed
The 2022 Honda ADV150 uses hydraulic disc brakes at both ends and is equipped with ABS. The front brake is operated by the right-hand lever, and the rear brake by the left-hand lever. Each side has its own master cylinder, reservoir, line, and caliper, so each side is bled separately. Bleeding pushes old fluid and trapped air out through the caliper bleeder while fresh fluid replaces it in the reservoir.
A spongy or soft lever, a lever that now pulls closer to the grip than it used to, or fluid that looks dark or cloudy in the reservoir are all reasons to bleed. The same applies after any work that opened the hydraulic system, such as new lines, caliper service, or master cylinder work. Brake fluid absorbs moisture over time, which lowers its boiling point and can contribute to brake fade under hard use, so many riders refresh it on a regular schedule even when the brakes still feel normal.
Tools and Supplies for a Clean, Controlled Bleed
- 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
- A length of clear tubing that fits snugly over the bleeder
- A catch bottle for the old fluid
- Rags or shop towels
- A syringe or turkey baster for removing old fluid from the reservoir
- A screwdriver that fits the reservoir cap screws
A one-way check-valve bleeder or a vacuum bleeder can make the job easier when working alone, but the manual lever-and-bleeder method works fine with patience. Use only the fluid type called for on the reservoir cap, and keep the container sealed until you are ready to pour. Do not top off with fluid from an old or opened container.
Prepare the Scooter and Protect the Finish
Support the ADV150 securely upright on a stand so it cannot tip while you work. Work on one brake at a time. Turn the handlebars so the reservoir for the brake you are bleeding sits level before you open it. Cover painted bodywork, plastic panels, and the instrument area with rags, because most brake fluids damage paint and plastic on contact. If fluid spills, wipe it up immediately and rinse the area with water.
Clean around the reservoir cap before removing it so dirt does not fall into the fluid. Keep the cap and diaphragm on a clean rag while you work. Do not open the bleeder yet; set up the reservoir first and confirm you have enough fresh fluid to finish the job.
Bleeding the Front and Rear Brakes, Step by Step
The front and rear systems are separate, so bleed one completely before moving to the other. As a general rule, if a system has more than one caliper, start with the caliper farthest from its master cylinder and bleed one caliper at a time. The steps below apply to each brake on the ADV150.
- Remove most of the old fluid from the reservoir with a syringe or turkey baster. Leave enough fluid in the reservoir that you do not pump air into the system, and wipe the reservoir rim clean.
- Fill the reservoir with fresh fluid to the correct level. Keep the cap and diaphragm nearby but do not install them while you are bleeding; cover the reservoir loosely to keep dirt out.
- Fit the clear tubing over the bleeder valve and route the other end into the catch bottle. The tubing must fit snugly so air cannot be drawn in around it. Place the box-end wrench on the bleeder.
- Squeeze and hold the brake lever firmly. Keep it held; do not release it while the bleeder is open.
- Open the bleeder about a quarter turn and let fluid and air flow out through the tubing. Watch the tube for bubbles and for the color of the fluid.
- Close the bleeder before you release the lever. This is critical: releasing the lever with the bleeder open can draw air back into the caliper. Then release the lever slowly.
- Check the reservoir level and top it off. Never let the reservoir run low enough to draw air. Repeat the squeeze-hold-open-close-release sequence until fresh, clean, bubble-free fluid comes through the tube, keeping the reservoir topped off throughout.
- When the fluid runs clean and bubble-free, close the bleeder snugly without overtightening. Check for seepage at the bleeder, then move to the other brake and repeat the same steps with its lever and caliper bleeder.
On an ABS-equipped bike like the 2022 ADV150, a standard bleed through the caliper bleeders is generally used to refresh fluid. If the reservoir ran dry, or if the ABS unit or its lines were disconnected, air may have entered the ABS unit itself. That situation may require a dealer-level procedure or diagnostic tool, so stop and take the scooter to a shop rather than trying to force it at home.
Finishing Up: Levels, Leaks, and Cleanup
Fill each reservoir to the correct level marking, then reinstall the diaphragm and cap. Clean any spilled fluid from the bodywork, caliper, and bleeder area, and rinse with water where appropriate. Check the bleeder and the banjo fittings at the master cylinder and caliper for leaks. Operate the lever several times and inspect again. If you see fluid weeping from a fitting, stop and correct it before riding; do not simply overtighten the bleeder.
Test the Brakes Before Normal Riding
The front and rear levers 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 either lever feels soft or inconsistent, do not ride the scooter until the problem is resolved.
If the Brakes Will Not Firm Up
A lever that will not firm up after several bleeding attempts, a lever that firms up only after pumping, persistent air bubbles, or fluid leaking from the master cylinder or caliper all point to a problem that needs more diagnosis. If air may have entered the ABS unit, or if you are not confident following the correct procedure, take the ADV150 to a qualified shop. Brakes are a safety-critical system, and a firm, reliable lever is the only acceptable result.
Related Shopping Categories
Shop Brake Fluid for a 2022 Honda ADV150 Motorcycle.
Shop Brake Lines for a 2022 Honda ADV150 Motorcycle.
Shop Brake Pads for a 2022 Honda ADV150 Motorcycle.
Shop Stands for a 2022 Honda ADV150 Motorcycle.
Shop Brake Tools for a 2022 Honda ADV150 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.
