Brake Master Cylinder Problem? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 6 (permalink) Old 03-20-2012, 07:59 PM Thread Starter
Crap, I WAS in 5th gear.
 
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Brake Master Cylinder Problem?

My front brake lever is a little notchy. It's been OK up until lately, but it is becoming more difficult to modulate, so it's time to fix it. Seems like the master cylinder to me.

Anybody had this problem, and what did you do to fix?
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post #2 of 6 (permalink) Old 03-20-2012, 09:57 PM
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When was the last time the brake fluid changed? You should do it every 2 years or 15,000 miles according to the book.
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post #3 of 6 (permalink) Old 03-21-2012, 02:56 PM
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What do you mean by notchy, is it pulsing if so warping disc, sticking piston maybe.
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post #4 of 6 (permalink) Old 03-21-2012, 05:28 PM Thread Starter
Crap, I WAS in 5th gear.
 
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It feels to me like the compression piston in the master cylinder is sticking a little when applying the brake- it releases fine. I'll change the fluid when I do the pads- it's been several years and 15,000 miles now.
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post #5 of 6 (permalink) Old 03-21-2012, 06:18 PM
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Yeah could be moisture in the system,
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post #6 of 6 (permalink) Old 03-21-2012, 08:36 PM
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I'd bleed it first and then, if it still is doing it, take off the master cylinder and clean the parts with a rag and brake fluid. It could be some gunk that is catching the little plunger inside there. Here is what the insides look like:

https://www.vn750.com/forum/showthread.php?t=20115

gl. It isn't hard at all.
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