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Re: R1100GS Master Cylinder
- Subject: Re: R1100GS Master Cylinder
- From: Tpcutter@xxxxxxx
- Date: Sat, 8 Jan 2005 19:47:53 EST
In a message dated 1/8/05 5:34:33 PM Eastern Standard Time,
<<I have been having reoccurring problems with the front brake lever hanging
up. Upon disassembly of the front brake lever, and removing the rubber boot
on the master cylinder, some type of corrosion is found. I've removed the
master cylinder piston twice and cleaned up the bore. I've cleaned the
piston and seals, and re-installed using the original components. The
corrosion came back once. I'm not sure if I just need a new rubber boot to
seal better or should go ahead and replace the piston and seals as well as
the rubber boot?
Anyone experience this type of problem before?>>
I think you will have trouble getting a rebuild kit for that master
cylinder. I know that some are unavailable.
What kind of brake fluid are you using? If you are using DOT5, that's your
trouble. Use Castrol GT-LMA (Low Moisture Absorbing) DOT 3/4 brake fluid and
change it annually. This will eliminate the corrosion problem pretty well.
If the seals are leaking, the buildup you are seeing is not corrosion per
se, just dried up, crystallized brake fluid. The leak is a warning sign to fix
the trouble before you lose brake pressure.