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Brake reservoir' gasket leaks, alternatives?
- Qdude
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- It is all good.
The master cylinder is rebuilt and works strong.
I am going to look at a plumbing hardware store for an O-ring that might fit.
Is using caulking/gasket sealer/silicon... an option? Worst case scenario is that I may need to go and get another master cylinder from a junkyard if I ever really need to pull the reservoir cup again...
Any thoughts on ways to cure the leak at the reservoir to master cylinder joining other than to find a rebuild kit?
77 KZ 650 C1.
77 KZ 650 C1.
Crashed-Repaired, Pods, Kerker pipe, re-wired core bundle, lamp upgraded, homemade rectifier, solid state regulator , Dyna-s ignition, repainted, slightly modified, year-round commuter
Honda Metro 85 mpg Scooter. Dont laugh I will throw it at you
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- PLUMMEN
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Still recovering,some days are better than others.
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- Qdude
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Therefore, won't rubber "for water" gaskets also work to seal up a reservoir that holds brake fluid?
I found an O-ring at the hardware store that I think will do the trick, I am going to go and test it on the bench now.
I guess and believe there will be no problems.
Anyone else know differently? I am working with brakes here and am always appreciative of the help.
Quinn
77 KZ 650 C1.
77 KZ 650 C1.
Crashed-Repaired, Pods, Kerker pipe, re-wired core bundle, lamp upgraded, homemade rectifier, solid state regulator , Dyna-s ignition, repainted, slightly modified, year-round commuter
Honda Metro 85 mpg Scooter. Dont laugh I will throw it at you
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- gane
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[img][/img] 1977 KZ1000A1
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- TeK9iNe
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It also has a very high boiling point (less brake fade), and doesnt absorb water as quickly.
Cheers.
PS. DOT 5 is not compatible with any other fluids. Hydraulic system must be completely drained first.
Motorcycle Shop Owner/Operator
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors
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- 650ed
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1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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- Qdude
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If I understand it correctly, rubber is NOT impervious to petroleum. So, don't use rubber for a fuel line, the gas will eat it up.
Brake fluid does not attack the rubber, so it is used on brake systems.
Therefore, I think I am safe using plumbing O-rings as the gasket for the reservoir.
So far the fix works like a charm.
I am going to stick to Dot 3.
just need to bleed the front brakes now to finish the hydraulics.
Oh yeah, 77 kz650c1.
77 KZ 650 C1.
77 KZ 650 C1.
Crashed-Repaired, Pods, Kerker pipe, re-wired core bundle, lamp upgraded, homemade rectifier, solid state regulator , Dyna-s ignition, repainted, slightly modified, year-round commuter
Honda Metro 85 mpg Scooter. Dont laugh I will throw it at you
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- Patton
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The crusty buildup around the reservoir gasket race on the rear brake master cylinder was so thick that (after cleaning) when I put the old rubber O-ring back in it no longer filled the gap. Now it leaks/seeps fluid.
The master cylinder is rebuilt and works strong.
I am going to look at a plumbing hardware store for an O-ring that might fit.
Is using caulking/gasket sealer/silicon... an option? Worst case scenario is that I may need to go and get another master cylinder from a junkyard if I ever really need to pull the reservoir cup again...
Any thoughts on ways to cure the leak at the reservoir to master cylinder joining other than to find a rebuild kit?
Does the o-ring in question appear on this diagram?
Good Luck!
[Click on image to enhance view.]
1973 Z1
KZ900 LTD
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- RonKZ650
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321,000 miles on KZ's that I can remember. Not going to see any more.
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- PLUMMEN
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Still recovering,some days are better than others.
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- gane
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[img][/img] 1977 KZ1000A1
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- Patton
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Others are removable, with an o-ring underneath.
And some are remote with a hose connection.
Apparently the typical parts diagram fails to show whether or not the reservoir is removable.
As I recall, when looking down into a removable reservoir, two screw heads are visible, which screws hold the reservoir onto the bore portion, with an o-ring sealing the juncture.
As to front master cylinder on large fours, here's a pic and some info from Redline.
redlinecycle.com/Brk%20-%20Trap%20Rsrvr%20O-%20Ring.html
Fwiw, the 1976 KZ900-B1 LTD rear master cylinder doesn't have a removable reservoir.
Good Luck!
1973 Z1
KZ900 LTD
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