Bleeding the Brakes on a 2020 Ducati SuperSport S: A Rider’s Step-by-Step Guide
Shop parts for a 2020 Ducati SuperSport S Motorcycle.
The 2020 Ducati SuperSport S uses a fully hydraulic brake system at both ends, with disc brakes front and rear and an ABS unit built into the circuit. That means both the front lever and the rear pedal move fluid rather than cables, and both sides of the system can be bled at home with basic hand tools. The front brake does the majority of the stopping work on a sport-oriented street bike like this, so it deserves the most attention, but the rear circuit still needs fresh fluid and a firm pedal to keep the whole package working the way Ducati intended.
This guide walks through a full fluid flush and air bleed on the SuperSport S. It assumes the ABS unit is healthy and that no air has been introduced upstream of the calipers. If the reservoir has run dry or the ABS hardware has been opened, read the troubleshooting section before you start—that situation is a shop job on this bike.
When a Bleed Is Due
Brake fluid is hygroscopic, meaning it pulls moisture out of the air over time. Even in a sealed system, that moisture lowers the fluid’s boiling point, and a boiling fluid creates vapor that behaves exactly like air in the lines. On a bike as capable as the SuperSport S, that shows up as a lever that goes soft or long during hard, repeated braking. Many riders simply refresh the fluid on a regular interval rather than waiting for a symptom.
Beyond scheduled maintenance, bleed the brakes any time the lever or pedal feels spongy, the lever creeps closer to the grip than it used to, the fluid in the reservoir looks dark or cloudy, or you have opened the hydraulic system for new lines, caliper service, or master cylinder work. Any of those events lets air in, and air must come out before the bike is safe to ride hard.
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 on each caliper
- Clear tubing sized to fit snugly over the bleeder nipple
- A small catch bottle for the old fluid
- Rags or shop towels, plus a syringe or turkey baster for pulling old fluid from 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
Clear tubing matters more than it sounds—you need to see the fluid and any bubbles moving through it to know when the job is done.
Setting Up Safely
Get the SuperSport S upright and stable on a stand before you touch anything. For the front circuit, turn the handlebars so the reservoir on the master cylinder sits level; a tilted reservoir lets fluid spill the moment the cap comes off. Lay rags over the tank, the fairing panels, the dash area, and anything else below the reservoir and calipers. Brake fluid attacks paint and many plastics on contact, so wipe up any drip immediately and rinse the area with water if a spill reaches a painted surface.
Work in a well-ventilated space and keep the fluid container capped when you are not pouring from it, since fresh fluid starts absorbing moisture as soon as it meets air.
The Bleeding Procedure
Work one circuit at a time, front first. If your bike has two front calipers, bleed each one in turn, and in general it is good practice to start with the caliper farthest from the master cylinder in terms of hydraulic path, then move to the closer one.
- Remove the reservoir cap and diaphragm. Use the syringe or baster to draw most of the old fluid out of the reservoir, but stop before the level drops near the bottom port—never let the reservoir run dry, or you will pull air straight into the master cylinder.
- Refill the reservoir with fresh fluid from the sealed container, leaving room for the diaphragm to sit back in later.
- Push the clear tubing onto the bleeder nipple and route the other end into the catch bottle, with the bottle positioned so the tube end stays submerged in old fluid if possible.
- Squeeze the front lever and hold it firm. With the lever held, open the bleeder about a quarter turn with the box-end wrench. Fluid and air will push out through the tube.
- Close the bleeder before you release the lever. Releasing with the bleeder open draws air back in through the nipple, which undoes your work.
- Repeat the squeeze–hold–open–close–release cycle, topping off the reservoir every few cycles so it never runs low. Watch the tubing: you are finished with that caliper when the fluid coming through is clean and free of bubbles.
- Move to the second front caliper if equipped, repeating the same cycle with a fresh top-off of the reservoir.
- Repeat the entire process at the rear caliper, using the brake pedal in place of the lever. Press and hold the pedal, crack the bleeder, close it, then release.
Keep the reservoir cap nearby and check the level often. A single dry pull on the lever can send a slug of air into the ABS unit, which turns a simple flush into a dealer visit.
Finishing and Checking Your Work
When clean, bubble-free fluid is flowing at every caliper, close each bleeder snugly with the box-end wrench. Snug is the goal—do not overtighten, since the bleeder seats on a small taper and excess force can damage it. Fill the reservoir to the level marking, reinstall the diaphragm and cap, and wipe down every surface you touched. Then inspect the bleeder nipples and the banjo fittings at the calipers and master cylinder for weeping or wetness; a leak here means the job is not finished.
Testing Before You Ride
With the bike still stationary, pull the front lever and press the rear pedal several times. Both should feel firm and consistent, and neither should slowly sink while held under steady pressure. Spin each wheel by hand to confirm the brakes are not dragging. Then, in a safe open area at low speed, test the brakes gently before riding normally. If anything feels vague at that point, stop and re-bleed rather than hoping it settles in.
Troubleshooting and When to Visit a Shop
A lever that will not firm up after several full bleeding attempts, a lever that only firms up after pumping, or a steady stream of bubbles that never ends all point to air entering somewhere it should not. Fluid weeping from the master cylinder or a caliper seal is a repair, not a bleed. Most importantly, the SuperSport S has ABS: if the reservoir ran dry, or the ABS unit or its lines were disconnected, air may be trapped inside the ABS hardware itself. That requires a dealer-level procedure or diagnostic tool, and the bike should go to a shop rather than be ridden. When in doubt, stop and get it checked—brakes are not the system to guess on.
Related Shopping Categories
Shop Brake Fluid for a 2020 Ducati SuperSport S Motorcycle.
Shop Brake Lines for a 2020 Ducati SuperSport S Motorcycle.
Shop Brake Pads for a 2020 Ducati SuperSport S Motorcycle.
Shop Stands for a 2020 Ducati SuperSport S Motorcycle.
Shop Brake Tools for a 2020 Ducati SuperSport 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.