Bleeding the Brakes on a 2009 Kawasaki EX500 / Ninja 500
Shop parts for a 2009 Kawasaki EX500 - Ninja 500 Motorcycle.
Know Your EX500's Brake Layout First
The 2009 Kawasaki EX500 – also sold as the Ninja 500 – uses hydraulic disc brakes at both ends. The front brake is fed by a master cylinder on the handlebar and actuated by the lever; the rear is fed by its own master cylinder and actuated by the pedal. Each system is independent, with its own reservoir, its own line, and its own bleeder at the caliper. That means you have two separate bleeding jobs to do, and neither one affects the other. This generation of the EX500 does not use an ABS unit or a linked braking system, so a straightforward manual bleed at the caliper is all that is required. If your particular bike has been modified with aftermarket components, treat the instructions below as a guide and inspect what is actually fitted before you start.
Why and When the Brakes Need Bleeding
Brake fluid is hygroscopic, meaning it pulls moisture out of the air over time. That moisture does two harmful things: it lowers the fluid's boiling point, so hard, repeated braking can boil the fluid and give you a lever that goes soft right when you need it most, and it corrodes the internals of the master cylinder and caliper. Many riders refresh the fluid on a regular interval even when nothing feels wrong, and that is a reasonable habit on a bike of this age.
Bleed the system right away if the lever or pedal feels spongy, if the lever now comes noticeably closer to the grip than it used to, if the fluid in either reservoir looks dark or cloudy, or if you have just opened the hydraulic system for any reason – new lines, a caliper rebuild, or master cylinder work. Any of those jobs lets air in, and air compresses where fluid does not, which is exactly what a soft lever feels like.
Tools and Supplies to Collect
- Fresh brake fluid of the type marked on the master cylinder reservoir cap, from a sealed container. Do not substitute a different type.
- A box-end wrench that fits the bleeder valve on each caliper snugly.
- Clear tubing that fits tightly over the bleeder nipple, plus a catch bottle to hang it in.
- Rags or shop towels, and a syringe or turkey baster for pulling old fluid out of the reservoir.
- The correct driver for the reservoir cap screws.
- Optional but helpful: a one-way check-valve bleeder or a vacuum bleeder, which makes a one-person job much easier.
Setting Up Before You Open Anything
Get the bike secure on a stand so it cannot tip while you are working, and give yourself room to reach both the lever and the caliper. For the front, turn the handlebars until the reservoir on the bar sits level; a reservoir that is tilted will spill as soon as the cap comes off. Lay rags over the tank, the plastics, the instrument cluster, and anything else below the reservoir, because brake fluid attacks paint and plastic on contact. If a drop does land somewhere it shouldn't, wipe it up immediately and rinse the area with water rather than waiting until the end of the job.
The Bleeding Procedure, Step by Step
Work on one system at a time – front first, then rear – and finish one completely before starting the other.
- 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.
- Refill with fresh fluid from the sealed container, leaving the reservoir comfortably full.
- Push the clear tubing onto the caliper bleeder nipple and route the other end into the catch bottle, with the bottle positioned so the tubing runs upward or level rather than straight down where possible.
- Squeeze the front lever (or press the rear pedal) and hold it steady. Do not release it yet.
- With the lever held, open the bleeder about a quarter turn with the box-end wrench. Fluid and air will push out through the tubing.
- Close the bleeder before you release the lever or pedal. Releasing with the bleeder open draws air straight back into the caliper, which is the single most common mistake in this job.
- Release the lever slowly, then repeat the squeeze-hold-open-close-release cycle. Check the reservoir level every few cycles and top it off – if it runs dry, you will pull air into the master cylinder and have to start over.
- Keep going until the fluid coming through the tubing is clean and free of bubbles, and the lever feels firm rather than spongy.
- Repeat the entire process at the rear caliper using the pedal. If your bike has two front calipers, bleed each one in turn, starting with the caliper farthest from the master cylinder in terms of line length and working toward the closest.
Finishing Up and Checking Your Work
Once the fluid runs clean, close the bleeder snugly with the box-end wrench. Snug is the goal – do not lean on it, because overtightening can damage the seat and create a leak. Pull the tubing off and wipe the caliper dry. Top the reservoir to the correct level marking, reinstall the diaphragm and cap, and clean up any fluid residue around the master cylinder. Then look closely at the bleeder and at the banjo fittings at both the master cylinder and the caliper for any weeping or dampness.
Testing Before You Ride
With the bike still stationary, pull the lever and press the pedal several times. Both should feel firm and consistent, and neither should slowly sink toward the grip or the floor while you hold steady pressure on it. Spin each wheel by hand to confirm the brakes are not dragging. Then take the bike to a quiet, safe area and test the brakes at low speed before riding normally. If anything feels vague at that point, stop and bleed again rather than hoping it settles in.
Troubleshooting and When to Take It to a Shop
If the lever will not firm up after several full bleeding cycles, if it only firms up when you pump it, or if you keep seeing bubbles no matter how long you bleed, something else is going on – typically air entering somewhere it shouldn't, such as a worn master cylinder seal or a loose fitting. Fluid weeping from the master cylinder or caliper is a definite stop-and-repair condition. On a bike like the EX500 with simple, independent, non-ABS systems, most of these issues are within reach of a careful home mechanic, but if you have replaced major components, if the lever behavior makes no sense after a thorough bleed, or if you simply are not confident in the result, hand it to a professional. Brakes are not the system to learn on by trial and error.
Related Shopping Categories
Shop Brake Fluid for a 2009 Kawasaki EX500 - Ninja 500 Motorcycle.
Shop Brake Lines for a 2009 Kawasaki EX500 - Ninja 500 Motorcycle.
Shop Brake Pads for a 2009 Kawasaki EX500 - Ninja 500 Motorcycle.
Shop Stands for a 2009 Kawasaki EX500 - Ninja 500 Motorcycle.
Shop Brake Tools for a 2009 Kawasaki EX500 - Ninja 500 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.
