The textbook definition of the brake is “A brake is a mechanical device that inhibits motion by absorbing energy from a moving system.” We all know brake is one of the most important parts in saving lives during an accident. Here’s a video that shows how brake plays an important role in saving lives.

It is very important to regularly inspect the functioning of your brakes even if you do not ride your bike at very high speed. There are a lot of cases that may cause your bike brake to fail. One of the primary factors involved is air bubbles in the brake fluid. A brake fluid is used to transfer the force generated by brake live to the disc in form of pressure. As air bubbles in the fluid can cause ineffective transfer of braking force to the disc it may result in an accident. I will show you how to remove air bubbles from the brake fluid for its effective usage.

Brake Bleeding

These are the following that you will be requiring for brake bleeding.

  1. Brake Fluid (Preferably Dot-3 or Dot-4 Fluid, check your fluid reservoir for the details)
  2. Screwdriver
  3. Small sized ring spanner.
  4. Flexible and transparent pipe.
  5. An Extra container to collect fluid.

Open the reservoir and top-up the brake fluid.

Unscrew the reservoir with the screwdriver. The reservoir is located near your brake lever. Now, pour the brake fluid in the reservoir. During the entire process make note that the reservoir is never empty, keep filling the reservoir with the fluid as and when it is about to get empty.

brake reservoir

Find the little nozzle called a brake bleeder screw.

Check out the reference image below to understand the position of the brake bleeder screw.

brake bleeder screw

Remove the rubber seal on top of the brake bleeder and unscrew the brake bleeder screw.

Only unscrew the screw by 90°(Do not unscrew it completely) only. Use the ring spanner only to unscrew the brake bleeder screw. Insert the transparent tube over the brake bleeder screw as shown in the image below.

Brake Bleeding

Leave the other end of the pipe in the container to collect the fluid from the brake bleeder screw.

Start Brake bleeding using the brake lever.

Bleed the brake by repeatedly pressing the brake lever to remove the fluid from the brake bleeder screw. You will now notice some small air bubbles in the fluid coming out of the brake bleeder screw. Repeat this process till no air bubbles are coming out of the brake bleeder screw.

Also, keep watch on the fluid level in the reservoir and make sure that the reservoir is never empty.

Screw the brake bleeder screw.

Once there are no air bubbles coming out of the brake bleeder screw, tighten the brake bleeder screw.

Here’s a small video of the entire process.

Do share it with your friends and comment below if you need any assistance.

One thought on “Disc Brake Performance Boost – Brake Bleeding

  1. It was a nice explanation about Disc Brake Performance with images, even I don’t know about bike repair but I understand well, thank you.

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