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Task #35 - Front Brake Bleeding
Warning!!!

  • Do not allow foreign material to enter the system when filling the resrvoir.
  • Avoid spilling fluid on painted, plastic or rubber parts. cover these areas with a rag whenever the system is serviced
  • Us only DOT 4 brake fluid from a sealed container
  • Do not mix different types of fluid as they are not compatible
Brake Fluid Draining:

Turn the handlebar to the left until the reservoir is level. Remove the screws, reservoir cover, set plate and diaphragm.
Connect a tube to the Bleed Valve and put the other end in a clean container.

Loosen the Bleed Valve and pump the brake lever until no more fluid flows out of the Bleed Valve.
Brake Fluid Filling/Bleeding

There are two different basic methods of filling and bleeding the front brakes. You can do it either "top down" or "bottom up". The tool pictured to the left is a special Honda brake bleeding tool that sucks the fluid from the reservoir down. Some other speical brake bleeders 'Push' the fluid up from a reservoir in the tool itself.
  Most of you will not have access to these specialized tools, so the simplest way is to do a manual fill & bleed.  First, close the bleed valve and put a CLEAN tube on the bleed valve and then set the open end of the tube into a CLEAN container and fill that container up with enough new brake fluid to cover the end of the tube.  Always keep the end of the tube in the clean brake fluid so that you do not inadvertantly suck air while bleeding.

  Next, fill the reservoir up with new, clean brake fluid.  Pump the brake lever until pressure is felt.  Then, squeeze the brake lever with steady pressure and WHILE DOING this, crack open the bleed valve 1/2 turn.  DO NOT release the brake lever while the fluid is flowing.  Let the fluid flow for a short time and then close the bleed valve quickly WHILE STILL PUTTING PRESSURE ON THE BRAKE LEVER.  Once the valve is closed, slowly ease up on the brake lever and let everthing rest for a little while.  Make sure you do not drain the reservoir while doing the bleeding.... so top it up between each cycle.

  Repeat this procedure until you no longer see any air bubbles coming out of the tube, then test the feel of the brakes. If the lever feels spongy, keep bleeding a couple of more tries.

  Once you are satisfied with the feel of the brakes, top up the reservoir to the full mark and then close it up, making sure that the set plate is between the diaphragm and the cover.





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