Vacuum brake bleeder
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- ptolemyx
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Vacuum brake bleeder
Thinking about getting a vacuum brake bleeder. Any recommendations? Are the cheap fleabay ones at £15ish any good - look the same a sthe M&P and Sportsbikeshop ones at £50ish?? Or should I opt for something like this Sealey product, reduced to £25:-
https://www.demon-tweeks.com/sealey-bra ... 20Workshop
https://www.demon-tweeks.com/sealey-bra ... 20Workshop
old and disgraceful so doing what I can while I can before I can't
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- billinom8s
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Re: Vacuum brake bleeder
Do you have an air compressor? Says it needs 120psi.
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Re: Vacuum brake bleeder
I had one of the Sealey bleeders (can't find it since moving house). I had pretty mixed results, as it seemed to introduce air into the fluid as it was being sucked out, so the fluid you could see in the tube was full of bubbles. This was even when doing a fluid change, where the brakes had been fine all along, and I was certin there was no (or very little) air in the system. I've not done a change for a while, so haven't investigated this further. They do need a compressor, and mine runs without a regulator, so it may be that I didn't get the pressure right, but I'm not convinced that was the issue. If you can do it the old fasioned way, I still think that's more reliable.
I'm not really grumpy, just misunderstood
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2010 BMW K1300S
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Bikes
2010 BMW K1300S
2006 Aprilia Tuono
2009 Benelli Tornado Tre RS
2001 Kawasaki ER5 (project)
1999 Yamaha R1 Track Bike
Re: Vacuum brake bleeder
Yup... in the past I have tried similar with a large syringe and it did the same.Grumpy Jase wrote: ↑Jul 8th, '22, 11:38 it seemed to introduce air into the fluid as it was being sucked out, so the fluid you could see in the tube was full of bubbles.
The bleeder nipples are designed to bleed under pressure and not from outside by vacuum. The action of opening the bleeder nipple (undoing it) also opens up the threads which can then allow air to leak in. This air doesn't get in the system but could still be in the bleed nipple when you close it.
The best bleeders are the ones that pressure in from the master, or from the caliper bleeder to do a reverse fill, but either-way they are pressure fills and not vacuum fills.
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- Robbo87
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Re: Vacuum brake bleeder
Ferzakly wot sayeth the Jug.
I too have wasted my dosh on 'miracle' vacuum brake bleeders in the past. Short of shelling out for a dedicated (and expensive) pressure refill system the best way is the old way - see multiple Youtube demos for how.
I too have wasted my dosh on 'miracle' vacuum brake bleeders in the past. Short of shelling out for a dedicated (and expensive) pressure refill system the best way is the old way - see multiple Youtube demos for how.
Triumph Sprint ST 1050.
Re: Vacuum brake bleeder
What I did do to make the process easier was to buy an inline one way valve (from ebay) and put that in some hose, and it works well.
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- Robbo87
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Re: Vacuum brake bleeder
I didn't have too much success when I tried that, seems the 'air getting past the bleed nipple threads' might have been at work.
Triumph Sprint ST 1050.
Re: Vacuum brake bleeder
The final trick is to only just crack the bleed nipple. It needs to be still quite hard to pull the lever in.
Doing that seems to stop the air leaking by the threads, or at least minimizes it to such an extent that it no longer creates bubbles in the drain hose.
Doing that seems to stop the air leaking by the threads, or at least minimizes it to such an extent that it no longer creates bubbles in the drain hose.
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- ptolemyx
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Re: Vacuum brake bleeder
Thanks guys. Looks like I'll keep on with the old fashoined way....
"Jane, squeeze it now"
"Jane, let go"
"Jane, squeeze"
"Jane, release"
"Jane, how does it feel now?"
Jane, is it hard yet?"
"Jane, squeeze it now"
"Jane, let go"
"Jane, squeeze"
"Jane, release"
"Jane, how does it feel now?"
Jane, is it hard yet?"
old and disgraceful so doing what I can while I can before I can't
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Re: Vacuum brake bleeder
Been riding and racing for over 40 years and we still do it by hand.
Some teams tell me it’s better forcing it from the bottom up.
Call me old fashioned but then I’m still heterosexual.
Some teams tell me it’s better forcing it from the bottom up.
Call me old fashioned but then I’m still heterosexual.
#152 Straights are for fast bikes. Corners are for fast riders
Re: Vacuum brake bleeder
Have had mixed results using the pumped vacuum system as previous bleeders.
Have found that using the master cylinder is best.
Crack the bleed valve, with a small visual tube from the bleed valve into a jam jar
With master cylinder open to top up when necessary, pump quick in, but slowly back to get full satisfaction.
Don't allow air to bypass the piston rubber when returning the levers to their standing positions. Go slow.
Have found that using the master cylinder is best.
Crack the bleed valve, with a small visual tube from the bleed valve into a jam jar
With master cylinder open to top up when necessary, pump quick in, but slowly back to get full satisfaction.
Don't allow air to bypass the piston rubber when returning the levers to their standing positions. Go slow.
- billinom8s
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Re: Vacuum brake bleeder
Patience, a good seat and fully open lever setting.
For stubborn ones, a syringe to pull the air out.
For stubborn ones, a syringe to pull the air out.
07977507395
don't forget we are onX and Instagrambelieve it or not !!!
southwestbikers@southwestbikers (original, I know.)
KTM 990 superduke R,
Zx10r trackbike, ktm 350 excf muddy
Suspension and bike work undertaken.
don't forget we are onX and Instagrambelieve it or not !!!
southwestbikers@southwestbikers (original, I know.)
KTM 990 superduke R,
Zx10r trackbike, ktm 350 excf muddy
Suspension and bike work undertaken.
- Mervin
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Re: Vacuum brake bleeder
syringe push fluid back up from caliper , if still a bit spongey cable tie lever to bar overnight air should work its way up
Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles,
Hunter S Thompson
Hunter S Thompson