clutch master cylinder rebuild? - K-Bikes.com - Excellence in Motion
 
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post #1 of 5 (permalink) Old Jun 20th, 2007, 1:58 pm Thread Starter
RRG
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clutch master cylinder rebuild?

I ordered a repair piston assembly for my 98' clutch master cylinder. It has been leaking. Has anyone done this repair? The BMW shop manual has no info for this procedure. Is there anything special to look out for?

RRG
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post #2 of 5 (permalink) Old Jun 20th, 2007, 2:08 pm
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Quote:
Originally Posted by RRG
I ordered a repair piston assembly for my 98' clutch master cylinder. It has been leaking. Has anyone done this repair? The BMW shop manual has no info for this procedure. Is there anything special to look out for?

I sure would like to know where you find a cylinder hone that small, for future reference.

Bruce C
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post #3 of 5 (permalink) Old Jun 20th, 2007, 2:51 pm
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Originally Posted by brucecha
I sure would like to know where you find a cylinder hone that small, for future reference.
I got cussed out royally by some cranky old brake shop owner about using a hone on an aluminum master cylinder. He claimed the hone would damage the hard anodized coating of the cylinder's wall. He told me to get a wooden dowel, make a saw cut at one end, and slip a piece of felt in the slot and use that moistened with brake fluid as a hone.

Did and it worked fine.
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post #4 of 5 (permalink) Old Jun 21st, 2007, 6:16 am Thread Starter
RRG
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I am "assuming" that the cylinder is in good shape and only need to replace the seals to cure the leak. If the cylinder is scorred it is probably a new assembly at $$$

RRG
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post #5 of 5 (permalink) Old Jun 21st, 2007, 7:30 am
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I hope nobody's getting ideas about trying this on the brake! The way I'm looking at the clutch slave is the clutch gets a lot of use, so replacing the whole lot is insurance against a breakdown. If a bore on modern aluminium cheap to make master cylinders is worn or scored then replacement should be the only option.

I've not read of regular problems on master cylinders and on a '98 bike I think I'd consider it spent. I even think I'd risk a boneyard part from a much later bike, than mess with a '98.



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