Brake fluid is an important part of your bike’s braking system. Over time, fluid efficiency decreases and braking becomes difficult and less accurate, which can be dangerous.

Level of difficulty : ⭐⭐⭐⭐
Average time needed : 45 min ⏳

When ?

The quality and efficiency of brake fluid decreases over time, so no matter how many kilometres you drive, it is recommended to purge the brake fluid every year. You can also feel it, if braking is more difficult, if you feel bumps, or if the lever or brake pedal are spongy, then it is time to replace the brake fluid.

Necessary equipment

Here’s what you need :

List of IPONE's products :

  • Brake fluid
    Brake dot 4 or Brake dot 5.1 according to the manufacturer’s recommendations for your bike and X-trem Brake Fluid for competiton motorcycles.
  • An environmental mat
    Ideal for preventing stainage on the floor.
  • Brake Cleaner
    Degreases brakes and all mechanical parts.

Other accessories needed:

  • A brake bleeding kit
  • Cloths to protect your bike
  • A tool box with a Phillips screwdriver and the appropriately-sized wrenches
  • A pair of surgical gloves

1. Place your bike

Start by putting your bike onto a stand to keep it upright.

Place cloths on the fairings under the reservoir to protect the bike from corrosion.

2. Drain the old liquid

Open the master cylinder reservoir with a screwdriver, taking care not to damage the screws.

Remove the cap and washer. Check the state of the washer, if it is damaged, change it, if it isn’t just clean it with a cloth.

On the brake caliper side, remove the rubber cap that protects the bleeder screw.

Place the correctly-sized wrench onto the bleed screw. Connect the bleeding kit to an air compressor and place the transparent tube onto the screw to empty the reservoir and braking circuit.

Slightly loosen the bleed screw and activate the bleeding kit, it should do all the work for you. Isn’t that nice?

Once the reservoir is empty, clean it thoroughly with a clean cloth. 

3. Add new brake fluid

Fill the reservoir with new brake fluid.

Vacuum once again until you see clean liquid with no bubbles in the tube near the bleed screw. Suction one last time while tightening the bleed screw. 

Afterwards, do a manual purge. Press the brake pedal (or the brake lever if you’re doing the front brake) about ten times. Keep pressure on the brake pedal (or on the lever) while slowly loosening the bleeder screw with the wrench without ever releasing pressure on the pedal or lever.

It is important to tighten the screw before releasing the lever to prevent the system from sucking in air.

Finally, top up the brake fluid level in the reservoir, and close it.

Check that the bleed screw is tight, remove the tube and replace the rubber cap.

Repeat the process for on the other brake.

While the bike is stationary, squeeze/push the brake lever/pedal to ensure that it feels firm. If it isn’t, there could still be air in the system.

Finally, clean the brakes with brake cleaner.

The essentials in video

To continue, we suggest watching our video tutorial on the same subject.


After any intervention on your bike, we recommend going for a small ride at cruising speed, this will allow you to control that everything is in place and that the operation has been carried out properly.

Enjoy your ride !