Bleeding the Brakes on a 2018 Ducati Scrambler Mach 2.0
Shop parts for a 2018 Ducati Scrambler Mach 2.0 Motorcycle.
The 2018 Ducati Scrambler Mach 2.0 uses hydraulic disc brakes at both ends and is equipped with ABS. The front lever and rear pedal each operate their own hydraulic circuit, so a normal caliper bleed is the right way to refresh fluid and remove air from the lines and calipers. The ABS unit adds one important caveat: if the reservoir has run dry or a line at the ABS unit has been opened, air may be trapped where a garage bleed cannot reach it. This guide walks through a careful front and rear bleed for the Mach 2.0, with checks to confirm the job before you ride.
When a Bleed Is Due
A spongy or soft lever, a pedal that feels longer than usual, 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 bleed. So is any recent work that opened the hydraulic system, such as new 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 lead to brake fade under hard use, which is why many riders refresh the fluid on a regular schedule. If the lever or pedal slowly sinks under steady pressure, do not ride the bike until the cause is found.
Tools and Supplies for the Job
- 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 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 the job easier for one person
Preparing the Mach 2.0
Support the bike securely upright on a stand so it cannot tip while you work. 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 a spill happens, wipe it up immediately and rinse the area with water. Keep the catch bottle lower than the bleeder so fluid and air flow away from the caliper, and work with the reservoir cap off only while you are actively bleeding that circuit.
Step-by-Step Bleeding Procedure
- Start with the front circuit. Remove the reservoir cap and diaphragm, then use the syringe or baster to remove most of the old fluid. Leave a little fluid at the bottom so you do not push air into the master cylinder.
- Refill the reservoir with fresh fluid from the sealed container, using the fluid type marked on the cap.
- Attach the clear tubing to the front bleeder and route the other end into the catch bottle. Make sure the tubing fits snugly so air cannot be drawn in around the bleeder.
- Squeeze and hold the front lever. Open the bleeder about a quarter turn to let fluid and air escape, then close the bleeder before you release the lever. Releasing the lever with the bleeder open can pull air back into the caliper.
- Repeat the squeeze-hold-open-close-release sequence. Check the reservoir often and top it off so it never runs low enough to draw air into the system.
- Continue until fresh, clean, bubble-free fluid comes through the tubing. If your front brake has more than one caliper, bleed each one in turn, starting with the caliper farthest from the master cylinder.
- When the front is done, tighten the bleeder snugly without overtightening. Fill the reservoir to the correct level marking, reinstall the diaphragm and cap, and wipe away any spilled fluid.
- Move to the rear circuit. Locate the rear reservoir, remove its cap and diaphragm, and remove most of the old fluid without letting the reservoir run dry.
- Refill with fresh fluid, attach the clear tubing to the rear bleeder, and route it to the catch bottle.
- Press and hold the rear pedal. Open the bleeder about a quarter turn, let fluid and air out, then close the bleeder before releasing the pedal. Repeat until the fluid is clean and bubble-free, topping off the reservoir throughout.
- Finish the rear by tightening the bleeder snugly, filling the reservoir to the correct level, reinstalling the diaphragm and cap, and cleaning any spills.
Finishing and Testing Before You Ride
After both circuits are bled, check the bleeder and banjo fittings for leaks. The front lever and rear pedal should feel firm and consistent, not spongy, and neither should 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 still feels soft, do not assume it will improve on the road; diagnose it first.
Troubleshooting and When to Stop
A lever that will not firm up after several bleeding attempts, a lever that firms only after pumping, persistent air bubbles, or fluid leaking from the master cylinder or caliper are reasons to stop and inspect further. On an ABS-equipped Mach 2.0, if the reservoir ran dry or the ABS unit or its lines were disconnected, a standard caliper bleed may not remove air from the ABS unit itself. That situation may require a dealer-level procedure or diagnostic tool, so take the bike to a shop rather than continuing to pump fluid through the system. If you are not confident in the result, have the brakes inspected before riding.
Related Shopping Categories
Shop Brake Fluid for a 2018 Ducati Scrambler Mach 2.0 Motorcycle.
Shop Brake Lines for a 2018 Ducati Scrambler Mach 2.0 Motorcycle.
Shop Brake Pads for a 2018 Ducati Scrambler Mach 2.0 Motorcycle.
Shop Stands for a 2018 Ducati Scrambler Mach 2.0 Motorcycle.
Shop Brake Tools for a 2018 Ducati Scrambler Mach 2.0 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.
