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Suffering from spongy soft brakes? Bleeding / Purging the brakes is not a difficult task. In fact we are going to be sharing a couple of good videos done by other riders on how to bleed the brakes as well but we will be talking about the mechanism as well in a non geeky way.
Important points to know
This is what we are going to cover:
Break bleeding is the process of removing ( purging ) air bubbles from the hydraulic brake lines. The brake system has hydraulic fluid inside which does not work well with air bubbles. This is because air bubbles compress whereas the fluid doesn’t (incompressible) . You would want the pressure of the brakes to easily transverse through to the brake pads right? The air presence in the system decreases its functionality and so we need to purge them out for a safer ride.
The idea is that you compress the the fluid and the air (forcing clean the system) and then release the fluid and air while in compressed state. To get a bubble-free brake fluid in the system the break line needs to be free from kinks and twists for the mechanism to work. The air bubbles need to be force cleaned towards the exit point; the bleed valve. In terms of the motorcycle you press the brakes to compress the air. Then you open the bleed valve to let the air and fluid out. Then close the bleed valve shut before you leave the pumped brake or air will be sucked in from the valve rather than fluid from the master cylinder.
We are going to start with a simple pump and hold method. Later we shall suggest possible ideas which are practically executable in India.
Here are a couple more things you could buy to to make this process simpler.
A nice video on how to bleed brakes. Watch it till the end