Bleeding the Brakes on Your 2017 Ducati Diavel
Shop parts for a 2017 Ducati DIAVEL Motorcycle.
What This Job Covers on the 2017 Diavel
The 2017 Ducati Diavel uses hydraulic disc brakes at both ends and is equipped with ABS. That means the front lever and the rear pedal both move brake fluid through master cylinders, lines, and calipers, and both sides can be bled at the caliper bleeders when you are refreshing fluid or removing air. The ABS unit adds hardware between the master cylinder and the calipers, but a normal fluid flush through the caliper bleeders is still the starting point. If the reservoir has run dry, a line or the ABS unit has been opened, or air has entered upstream of the calipers, the ABS unit may need a dealer-level procedure or diagnostic tool. Do not try to force air out of the ABS unit by pumping the lever repeatedly; if the lever or pedal will not firm up after a careful bleed, stop and have the bike serviced.
When Bleeding Is Needed
A spongy lever, a rear pedal that feels soft or travels farther than it used to, or a lever that pulls closer to the grip are classic signs that air or old fluid is affecting the system. Dark or cloudy fluid in the reservoir is another reason to flush. Bleeding is also required after any work that opened the hydraulic system, such as installing new brake lines, servicing a caliper, or replacing a master cylinder. Even without symptoms, 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. Use only fresh brake fluid of the type marked on the master cylinder reservoir cap, and pour it from a sealed container.
Tools and Supplies to Have Ready
- Fresh brake fluid of the type marked on the 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 used 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 bleeding easier
Prepare the Bike and Protect the Finish
Support the 2017 Diavel securely upright on a stand so it cannot tip while you are working at the bars or the rear caliper. Turn the handlebars so the front reservoir sits level before you open it. Cover painted surfaces, plastic bodywork, 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. Keep the catch bottle below the caliper and route the clear tubing so it does not loop upward and trap fluid near the bleeder.
Step-by-Step Bleeding Procedure
- Open the front reservoir and use the syringe or turkey baster to remove most of the old fluid. Do not let the reservoir run dry while you are removing fluid.
- Refill the reservoir with fresh fluid of the type marked on the cap, leaving room for the diaphragm and cap to be reinstalled later.
- Fit the clear tubing snugly over the front caliper bleeder valve and route the other end into the catch bottle.
- Squeeze and hold the front lever. With the lever held, open the bleeder about a quarter turn to let fluid and air escape.
- Close the bleeder before you release the lever. Releasing the lever with the bleeder open can draw air back into the caliper.
- Repeat the squeeze-hold-open-close-release sequence until fresh, clean, bubble-free fluid comes through the tubing. Check the reservoir often and top it off so it never runs low enough to draw air into the system.
- If your Diavel has more than one front caliper, treat each caliper as a separate bleed point and finish one before moving to the other. As a general rule, start with the caliper farthest from the master cylinder if the layout gives you a clear choice.
- Move to the rear brake and repeat the same process with the rear pedal: press and hold the pedal, open the rear bleeder about a quarter turn, close it before releasing the pedal, and continue until the fluid runs clean and bubble-free. Keep the rear reservoir topped off throughout.
Finishing the Job
When clean fluid is flowing at both ends, tighten each bleeder snugly without overtightening. Fill the reservoir to the correct level marking, reinstall the diaphragm and cap, and wipe away any spilled fluid. Check for leaks at the bleeder valves and at the banjo fittings where the lines attach. A dry fitting after several lever or pedal applications is a good sign; a wet fitting or a drip means you need to stop and correct it before riding.
Test Before You Ride
The front lever and rear pedal should feel firm and consistent, not spongy, and they 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 the lever or pedal changes feel after the bike sits, or if either one needs pumping to come up, there is still air in the system or a leak that needs attention.
If the Lever or Pedal Will Not Firm Up
A lever that will not firm up after several careful bleeding attempts, a lever that firms only after pumping, persistent bubbles in the tubing, or fluid leaking from the master cylinder or caliper are reasons to stop and diagnose rather than keep bleeding. Because the 2017 Diavel has ABS, any situation where air may have entered the ABS unit itself is best handled by a shop with the correct diagnostic equipment. The same applies if a line or the ABS unit has been disconnected. A proper caliper bleed is still the right first step, but it is not a substitute for an ABS-level procedure when the unit has ingested air.
Related Shopping Categories
Shop Brake Fluid for a 2017 Ducati DIAVEL Motorcycle.
Shop Brake Lines for a 2017 Ducati DIAVEL Motorcycle.
Shop Brake Pads for a 2017 Ducati DIAVEL Motorcycle.
Shop Stands for a 2017 Ducati DIAVEL Motorcycle.
Shop Brake Tools for a 2017 Ducati DIAVEL 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.
