How To Bleed 2012 Triumph Daytona 675 Motorcycle Brakes

Bleeding the Brakes on a 2012 Triumph Daytona 675

Why and when the Daytona 675 needs a brake bleed

The 2012 Triumph Daytona 675 uses hydraulic disc brakes at both ends, so the front lever and the rear pedal both rely on clean, air-free fluid to transfer pressure to the calipers. If your bike is an ABS-equipped example, the same basic caliper-level bleed is generally used to refresh fluid, but any air that has entered the ABS unit itself is a different matter and should be handled by a shop. The standard Daytona 675 brake layout is straightforward enough for a DIY-inclined rider to service, provided you work methodically and never let the reservoir run dry.

Bleeding is due when the front lever or rear pedal feels spongy, when the lever pulls closer to the grip than it used to, when the fluid in the reservoir looks dark or cloudy, or 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. On a sportbike like the Daytona 675, a firm, consistent lever is part of riding confidently, so do not put off a bleed if the feel has changed.

Tools and supplies to gather before starting

• 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, plus 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, which can make the job easier for one person

Use only fresh fluid from a sealed container, and confirm the fluid type on the reservoir cap rather than assuming. Have everything within reach before you open the reservoir, because once the system is open you do not want to stop and search for a tool while the reservoir is low.

Set up the bike and protect the finish

Support the 2012 Daytona 675 securely upright on a stand so it cannot tip while you are working at the lever and calipers. Turn the handlebars so the front reservoir sits level before you open it; a level reservoir makes it easier to remove old fluid and refill accurately. 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 reservoir cap and diaphragm clean and set them on a clean towel, not on the floor where grit can collect.

The bleeding procedure, front and rear

Work through the following steps in order. The front brake is usually the first system to service, and the rear hydraulic brake follows the same logic. If your Daytona 675 has a front caliper on each side, bleed each one in turn and finish one caliper before moving to the other. As a general practice, begin with the caliper that has the longest hydraulic path from the master cylinder; on a twin-caliper front end the two sides are often similar, so pick one and complete it before moving on.

1. Open the reservoir and remove most of the old fluid with a syringe or turkey baster, but do not let the reservoir run dry. Leave enough fluid to cover the outlet so you do not draw air into the master cylinder.
2. Refill the reservoir with fresh fluid of the type marked on the cap, taking care not to splash it onto painted or plastic surfaces.
3. Attach the clear tubing to the bleeder valve and route the other end into the catch bottle. The tubing should fit snugly so air cannot be drawn in around the bleeder.
4. For the front brake, squeeze and hold the lever. For the rear brake, press and hold the pedal. Maintain steady pressure while you open the bleeder.
5. Open the bleeder about a quarter turn to let fluid and air escape through the tube. Watch the tube for bubbles and for the color of the fluid.
6. Close the bleeder before you release the lever or pedal. Releasing first can pull air back into the caliper.
7. Release the lever or pedal, then repeat the squeeze-and-hold, open, close, and release sequence. Keep topping off the reservoir throughout so it never runs low enough to draw air into the system.
8. Continue until fresh, clean, bubble-free fluid comes through the tube. If you are bleeding a front caliper on each side, repeat the sequence on the second caliper, then check the lever feel again.
9. For the rear brake, follow the same sequence using the pedal: press and hold, open the bleeder, close it, then release. Repeat until the fluid runs clean and free of bubbles.
10. When the fluid is clean at every caliper, close the bleeder snugly without overtightening it. A bleeder only needs to be tight enough to seal; excessive force can damage the valve or caliper.

Finishing up and checking for leaks

Fill the reservoir to the correct level marking, then reinstall the diaphragm and cap. Clean any spilled fluid from the reservoir, caliper, and surrounding parts, and rinse with water if fluid reached painted or plastic surfaces. Check for leaks at the bleeder valves and at the banjo fittings. A dry shop towel wiped around each fitting will show fresh fluid quickly. If you see weeping at a bleeder, snug it slightly more; if a banjo fitting is wet, stop and investigate before riding.

Test the brakes before riding normally

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, and make sure the bike stops smoothly without a long lever or pedal. If the feel is still soft, do not ride the bike as if the job is complete.

When the job is beyond a home bleed

If the lever will not firm up after several bleeding attempts, if it firms up only after pumping, if persistent air 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 an ABS unit — for example, if the reservoir ran dry or the ABS unit or its lines were disconnected — may require a dealer-level procedure or diagnostic tool, and the bike should go to a shop. A properly bled 2012 Daytona 675 should give you a firm, predictable brake feel; if it does not, the safest choice is to have the system inspected before you ride.

Related Shopping Categories

Shop Brake Fluid for a 2012 Triumph Daytona 675 Motorcycle.

Shop Brake Lines for a 2012 Triumph Daytona 675 Motorcycle.

Shop Brake Pads for a 2012 Triumph Daytona 675 Motorcycle.

Shop Stands for a 2012 Triumph Daytona 675 Motorcycle.

Shop Brake Tools for a 2012 Triumph Daytona 675 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.