2009-2010 Honda CRF450r – Bleeding Brake System

How To Bleed The Brake System On Your 2009-2010 Honda CRF450r.

2009 - 2010 Honda CRF450r - Brake BleedingThe Tools You Will Need Are:

  • 8mm Wrench
  • Clear Tubing
  • Catch Pan
  • Shop Towels

The only part you will need is a bottle of fresh DOT 4 brake fluid.

If you don’t have your brake fluid yet, you can get some HERE (link to RockymountainATVMC.com).

Bleeding your brake system is a simple procedure, but does require patience.

You can bleed your brakes either manually, or with a hand-held vacuum pump.

The vacuum pump is faster, but I don’t take it to the track, so we’re going to stick with the manual method.

Remember! Brake fluid will damage your pads, so keep your shop towels ready!

Related: 2009-2010 Honda CRF450r – Front Master Cylinder Service

Bleeding Your Brakes

The bleeding procedure is the same on the front and rear brakes.

Connect your tube to the bleeder valve, and place the drain end in your catch pan.2009 - 2010 Honda CRF450r - Brake Bleeding - Connecrt Clear Tube Fill the reservoir to the marked limit, but do not install the cap.

The brakes are a sealed system, so installing the reservoir cap will work against the bleeding process by creating a vacuum in the reservoir.

2009 - 2010 Honda CRF450r - Brake Bleeding - Fill Reservoir

Firmly apply the brakes, and hold them.2009 - 2010 Honda CRF450r - Brake Bleeding - Engage Brakes With pressure applied, open the bleeder valve.

2009 - 2010 Honda CRF450r - Brake Bleeding - Opn Bleeder ValveAfter the system pressure is released, close the bleeder valve, then release the brake.

2009 - 2010 Honda CRF450r - Brake Bleeding - Close Bleeder Vavle2009 - 2010 Honda CRF450r - Brake Bleeding - Release BrakesDo NOT Pump Your Brakes!

If you pump the brakes with the valve open, you will draw air back into the system.

Be Careful!Repeat this process until the air bubbles have stopped, and only brake fluid can be seen in the tube.

2009 - 2010 Honda CRF450r - Brake Bleeding - Repeat Untill Fresh Fluid Is In tubeIf you are replacing fluid, repeat this process until fresh brake fluid is pumped from the caliper.

Throughout the bleeding process, keep an eye on your fluid level. If you let the reservoir drain, you will introduce air from the opposite side of the brake system, and you need to start over.

If you have any questions or anything to add, please leave them in the comments or on our FaceBook page!

Keep Your ’09-’10 CRF450r Running Right!

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