How to Bleed the Brakes on a 2019 Ducati Diavel 1260 S
Shop parts for a 2019 Ducati Diavel 1260 S Motorcycle.What This Job Covers on the Diavel 1260 S
The 2019 Ducati Diavel 1260 S uses hydraulic disc brakes at both ends and is equipped with ABS. The front and rear circuits are separate, so you will bleed the front brake at the lever and the rear brake at the pedal as two distinct jobs. The ABS hardware does not change the basic caliper-bleed procedure when you are simply refreshing fluid or removing air that entered at a caliper or line. It does matter if the reservoir has run dry or the ABS unit or its lines have been disconnected: in that case, air may be trapped inside the ABS unit, and the bike should go to a shop with the appropriate diagnostic equipment. This article covers a normal fluid flush and air bleed through the caliper bleeders, not an ABS-unit service.
When Bleeding Is Needed
Bleed the brakes when the lever or pedal feels spongy, when the lever pulls closer to the grip than it used to, or when the fluid in the reservoir looks dark or cloudy. Bleeding 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. That moisture lowers the fluid’s boiling point and can contribute to brake fade under hard use, so many riders refresh the fluid on a regular schedule. On the Diavel 1260 S, treat the front and rear as separate systems and check both.
Tools and Supplies to Gather
- 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
- 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
A one-way check-valve bleeder or a vacuum bleeder can make a one-person job easier, but the manual lever-and-bleeder method works fine if you have a helper or a check valve.
Preparation Before You Open the System
Support the bike securely upright on a stand. 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 fluid spills, wipe it up immediately and rinse the area with water. Work in a well-ventilated space and keep the reservoir cap and diaphragm clean once removed.
Bleeding the Front Brake
Work with the reservoir level and keep an eye on the fluid level throughout. The front master cylinder is at the lever, and the caliper bleeders are at the front calipers. If your bike has two front calipers, bleed each one in turn. As a general practice, start with the caliper farthest from the master cylinder, then do the other side.
- Open the reservoir and use the syringe or turkey baster to remove most of the old fluid. Do not let the reservoir run dry.
- Refill the reservoir with fresh fluid from the sealed container, leaving room for the diaphragm and cap later.
- Attach the clear tubing to the first caliper bleeder and route the other end into the catch bottle.
- Squeeze and hold the front lever. Keep steady pressure on it.
- Open the bleeder about a quarter turn to let fluid and air escape through the tube. Close the bleeder before you release the lever.
- Release the lever, then repeat the squeeze-hold-open-close sequence. Check the reservoir often and top it off so it never draws air.
- Continue until fresh, clean fluid comes through the tube with no bubbles. Then move to the other front caliper if your bike has two, and repeat the sequence.
Bleeding the Rear Brake
The rear brake is a separate hydraulic circuit on this model. Use the same sequence at the rear caliper bleeder, but operate the rear pedal instead of the front lever. Press and hold the pedal, open the bleeder about a quarter turn, close it before releasing the pedal, and repeat. Keep the rear reservoir topped off with fresh fluid and continue until the fluid in the clear tube is clean and bubble-free. Do not let the reservoir run low enough to pull air into the system.
Finishing the Job
When both circuits are bled, tighten each bleeder snugly without overtightening. Fill each reservoir to the correct level marking, reinstall the diaphragm and cap, and clean any spilled fluid from the bike. Check for leaks at the bleeder and at the banjo fittings. A dry fitting after several lever or pedal applications is what you want to see; a weep or wet film means you need to stop and correct it before riding.
Testing Before You Ride
The lever and 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 test, or if either one pulls toward the bar or floor, do not ride the bike until the problem is resolved.
Troubleshooting and When to See a Shop
If the lever will not firm up after several bleeding attempts, if it firms up only after pumping, if bubbles keep appearing, or if fluid is leaking from the master cylinder or caliper, stop and diagnose the problem rather than continuing to bleed. Any situation where air may have entered the ABS unit is a shop job, and the same goes for a linked-brake system if you are not certain of its required sequence. A lever that never becomes firm, a persistent leak, or a brake that drags after bleeding should be handled by a qualified technician before the bike is ridden.
Related Shopping Categories
Shop Brake Fluid for a 2019 Ducati Diavel 1260 S Motorcycle.
Shop Brake Lines for a 2019 Ducati Diavel 1260 S Motorcycle.
Shop Brake Pads for a 2019 Ducati Diavel 1260 S Motorcycle.
Shop Stands for a 2019 Ducati Diavel 1260 S Motorcycle.
Shop Brake Tools for a 2019 Ducati Diavel 1260 S 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.
