Bleeding brake (and clutch)

robs ss · Sunday at 5:52 AM

What type of bleeding device are you blokes using that you would recommend?
I have cNw twin Brembos at the front plus their hydraulic clutch.
It has Dot 5 (silicone), not that that matters. It is non-hydroscopic but figure I should change to fluid soonish.

I have heard of "pressure bleeders" but never owned or used one.

Any helpful advice appreciated.

kommando · Monday at 8:48 AM

Dot 5 is viscous so is harder to bleed so changing may make things easier but you will need to remove all the dot 5 and flush with a solvent of some sort as it does not mix with non dot 5. I have never had to use a bleeder but I have Norton sleeved master and Lockheed racing caliper.

Tornado · Monday at 11:06 AM

Ive at times used a syringe to draw fluid tbrough and or push it through for reverse bleeding. But usually I just used a bit of hose, a catch jar/bottle and either pumped from master cylinder or i open the bleeder and let gravity do the bleeding...this is safer if MC is old with potential pitti g/roighness beyond the usual swept area of the bore...avooding damaging the seals. Takes longer but works well on my bikes and cars.

robs ss · 2026-09-24T23:16:44-0600

kommando said:
Dot 5 is viscous so is harder to bleed so changing may make things easier but you will need to remove all the dot 5 and flush with a solvent of some sort as it does not mix with non dot 5. I have never had to use a bleeder but I have Norton sleeved master and Lockheed racing caliper.

Thanks K, but I'm sticking with Dot 5, just renewing the fluid.
Cheers

robs ss · 2026-09-25T04:51:58-0600

I just bought a couple of cheap check-valves and hoses. I'll advise how it went after trying.

Just means (hopefully) I won't need to keep closing the nipple on the calipers.

https://www.ebay.com.au/itm/358769454944?mkevt=1&mkpid=0&emsid=e11400.m144671.l197928&mkcid=7&ch=osgood&euid=d53ecab4ccd445bc8e51811ca400c770&bu=43568365633&exe=0&ext=0&osub=-1%7E1&crd=20260925034938&segname=11400

robs ss · 2026-09-25T04:56:52-0600

...I must say, I'm slightly underwhelmed by the feedback. Don't you guys change your brake fluid? - or do your wives/girlfriends operate the nipples and get pissed of with your narkey/snappy commands?

Deets55 · 2026-09-25T05:09:50-0600

Standard bleed procedure:
squeeze lever,
open bleeder,
when lever (or pedal) reaches end of stroke, close bleeder,
release.
Repeat as many time as necessary

If I have to break to system open for a reason, depending on where I open it up, I will usually force bleed with a syringe through the bleeder.

Doesn't require much pressure to seal a good fitting nipple. I also use a socket to loosen and tighten the bleeder, and a small wrench to do the bleeding.

robs ss · 2026-09-25T05:14:34-0600

Deets55 said:
Standard bleed procedure:
squeeze lever,
open bleeder,
when lever (or pedal) reaches end of stroke, close bleeder,
release.
Repeat as many time as necessary

If I have to break to system open for a reason, depending on where I open it up, I will usually force bleed with a syringe through the bleeder.

Doesn't require much pressure to seal a good fitting nipple. I also use a socket to loosen and tighten the bleeder, and a small wrench to do the bleeding.

Yep - thanks - that's the way I usually do it.
Thought there might be something easier - especially for changing all the fluid.

Tornado · 2026-09-25T16:05:42-0600

The more sophisticated the bleeder method, like vacuum or even power bleeders etc, the longer it takes to setup and clean up afterwards. Such setups only make sense then doing several vehicles, cars & and trucks. A motorcycle is a snap with simple hose and catch can.

Bleeding brake (and clutch)

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