Bleeding the Brakes on a 2006 Honda CB600F/599
Shop parts for a 2006 Honda CB600F - 599 Motorcycle.What This Bleed Covers on the CB600F/599
The 2006 Honda CB600F/599 uses hydraulic disc brakes at both ends, so this is a true brake-fluid service rather than a drum-brake adjustment. The front lever works the front hydraulic circuit, and the rear pedal works the rear hydraulic circuit. That means a complete refresh covers both systems: the front master cylinder and its caliper or calipers, and the rear master cylinder and caliper. The front and rear circuits are separate, so bleed one system at a time and keep the other closed. If your particular bike is fitted with ABS, a routine caliper-level bleed is still the normal way to renew fluid, but air that has entered the ABS unit itself is a different problem and should go to a shop. The procedure below is written for the conventional hydraulic system on this model.
When a Bleed Is Due
A spongy or soft front lever, a rear pedal that feels vague, or a lever that now pulls closer to the grip than it used to are all signs that air or old fluid is affecting the system. Dark or cloudy fluid in the reservoir is another clear cue. You should also bleed the brakes 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, which lowers its boiling point and can lead to brake fade under hard use. Many riders refresh the fluid on a regular schedule for that reason alone. On the CB600F/599, do not ignore a lever that feels different after the bike has sat; moisture and air do not improve with time.
Tools and Supplies to Stage Before You Open Anything
- 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
- 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 this job easier to do alone, but the manual lever-and-bleeder method works fine if you have a helper or a way to hold pressure. Keep the fluid container capped when you are not pouring, and do not reuse fluid that has been sitting open.
Preparation and Paint Protection
Support the bike securely upright on a stand so the reservoirs sit at a stable angle. For the front, turn the handlebars until the reservoir on the master cylinder is 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. Remove the reservoir cap and diaphragm carefully, set them on a clean rag, and keep dust and grit out of the open reservoir. Work in a well-ventilated area and keep the fluid away from anything you do not want stained.
The Bleeding Procedure, Front and Rear
Work on one circuit at a time. The front is usually the easiest to start with because the reservoir is right at the handlebar, but the rear follows the same logic with the pedal and rear reservoir.
- With the bike upright and the front reservoir level, remove the cap and diaphragm. Use the syringe or baster to remove most of the old fluid from the reservoir without letting the level drop low enough to draw air into the master cylinder.
- Refill the reservoir with fresh fluid of the type marked on the cap. Keep the container sealed between pours.
- Fit the box-end wrench onto the bleeder valve, then push the clear tubing snugly over the bleeder and route the other end into the catch bottle. The tube should stay clear of painted parts and should run so you can see bubbles moving through it.
- Slowly pump the front lever several times, then hold it firmly against the grip. For the rear, press and hold the pedal. Do not release pressure while the bleeder is open.
- Open the bleeder about a quarter turn. Fluid and air will move out through the tube. Watch the reservoir level and the tube at the same time.
- Close the bleeder before you release the lever or pedal. Releasing first can pull air back into the caliper. Then release the lever or pedal slowly and let it return.
- Check the reservoir and top it off with fresh fluid. Repeat the squeeze-hold-open-close-release sequence until clean, fresh fluid comes through the tube with no bubbles. Never let the reservoir run low enough to pull air into the system.
- If your bike has two front calipers, bleed each one in turn. Start with the caliper farthest from the master cylinder by hose routing, then do the other. If your bike has a single front caliper, simply work that one. For the rear, use the same sequence with the pedal and rear bleeder.
- When the fluid runs clear and bubble-free, close the bleeder snugly without overtightening. Top the reservoir to the correct level marking, reinstall the diaphragm and cap, and wipe up any fluid that escaped.
Finishing, Testing, and When to Stop
After both circuits are bled, check for leaks at the bleeder valves and at the banjo fittings. 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. If the lever or pedal will not firm up after several bleeding attempts, if it firms only after pumping, if bubbles keep appearing, or if fluid is leaking from the master cylinder or caliper, stop and have the bike inspected. The same applies if air may have entered an ABS unit or a linked brake system; those systems can require a dealer-level procedure or diagnostic tool, and guessing at the sequence is not worth the risk on a safety-critical system.
Related Shopping Categories
Shop Brake Fluid for a 2006 Honda CB600F - 599 Motorcycle.
Shop Brake Lines for a 2006 Honda CB600F - 599 Motorcycle.
Shop Brake Pads for a 2006 Honda CB600F - 599 Motorcycle.
Shop Stands for a 2006 Honda CB600F - 599 Motorcycle.
Shop Brake Tools for a 2006 Honda CB600F - 599 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.
