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How To Bleed Motorcycle Brakes by yourself DIY – 08 – RCB quick tutorial


Now that everything is in place I can bleed the brake system. Is not a difficult process but if it’s not done properly it can take all day and it can compromise the quality of the braking. First of all I need to loosen the purging
fitting on the brake caliper and connect it to a length of clear plastic hose. The hose needs to be routed upward and then
looped around a couple of times so that the oil that will come out from the caliper will
form a sort of a one way valve that won’t allow the air to flow back into the system. Then everything is secured with a zip tie. Now I can open the reservoir tank… And fill it up with DOT 5 brake oil trying
not to make a mess like I’m doing right now. To bleed the system and flush out the air
I start pumping the lever and when the system is full, oil starts pouring out of the bleeding
valve on the caliper. As you can see a mixture of oil and air bubbles
are coming out of the valve. Those air bubbles have to go, because being
air a compressible gas, it would compromise the quality of the braking. After quite a lot of pumping and a few oil
refills of the reservoir, we can see that the air bubbles are diminishing until they
disappear. At this point I can tighten the bleeding valve
and then remove the plastic hose. The reservoir can also be closed at this time
and the braking system is ready to go… well, actually is ready to stop…

6 thoughts on “How To Bleed Motorcycle Brakes by yourself DIY – 08 – RCB quick tutorial

  1. I prefer the reverse method with a large syringe myself. Then you will move the brake fluid against gravity just like the air out of the system. On a street bike just stick to DOT4 fluid.

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