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Sportster master cylinder leak

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Old May 31, 2015 | 11:33 AM
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Default Sportster master cylinder leak

I resently bought a 2000 sportster XL1200. I've notice a significant amount of break fluid is seeping out of my front brake master cylinder sight glass. Does anyone know if there is a replacement for the rubber seal and glass? Or should I put some appoxy or silicon on it to seal it off. I'd hate to have to replace the entire MC.
 
Old May 31, 2015 | 11:49 AM
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Watch this to learn about the master cylinder cover . The video is about the brake fluid change but towards the tail end (maybe last 5-8 minutes) it has the info you are looking for.

 
Old May 31, 2015 | 01:08 PM
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^^^^this.....on a second note. Never use silicon or epoxy to seal the MC that has bad news written all over it. Imagine what would happen if you got silicone mixed into your brake fluid.
 
Old May 31, 2015 | 01:58 PM
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Silicon is a big no-no anywhere around a brake system never do that.
 
Old May 31, 2015 | 02:11 PM
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My problem isn't with the cap or rubber seal. It is with the sight glass on the front of the master cylinder.
 
Old May 31, 2015 | 02:13 PM
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Brake fluid will just swell silicon and make a mess even if it doesn't get into the system, that stuff isn't a fix all for any leak.
 
Old May 31, 2015 | 04:06 PM
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I agree the silicon is defiantly not the solution. But, has anyone heard of a replacement for the front glass?
 
Old May 31, 2015 | 04:58 PM
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Pretty sure the sight glass and the MC is one piece. Gotta replace it as a whole. Plus when it comes to your brake system it's never a good idea to pinch penny's. It's a safety thing.
 
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Old May 31, 2015 | 06:34 PM
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Originally Posted by WoSporty
I agree the silicon is defiantly not the solution. But, has anyone heard of a replacement for the front glass?
Dunno about the newer bikes but the evo style mc's had a rebuild kit with that glass & rubber gasket in it maybe a call to the dealer parts dept. or hunting around J&P online may turn up something.
 
Old May 31, 2015 | 08:13 PM
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If the sight glass is in the lid, just replace it. The new lid comes with the rubber seal.
 



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