cleaning the master cylinder - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 4 (permalink) Old 11-29-2010, 09:07 PM Thread Starter
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cleaning the master cylinder

How do I clean the master cylinder container that holds the brake fluid? I need to wipe the brown film that is in the "walls" of it. would i have to bleed the fluid completely out?
thanks
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post #2 of 4 (permalink) Old 11-29-2010, 09:58 PM
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Have you tried using a lint free cloth? Not sure what your brown film is, but if it's mostly dirty brake fluid residue, it should wipe out. Don't use gas or any other solvent on the cloth. You don't want to contaminate the system with a foreign fluid. You could put a few drops of clean brake fluid on the cloth if it doesn't want to come off with the cloth alone.

No, you don't have to bleed the fluid completley out, and I don't recommend doing so. Make sure the level stays at the top of the hose or a little higher so you don't get bubbles in the line. I'm assuming you are going to add fresh fluid to the entire system once you have cleaned the mc, correct?

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
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post #3 of 4 (permalink) Old 11-29-2010, 11:21 PM Thread Starter
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yes i am adding clean brake fluid. My front brakes locked up on me. The brake fluid was a dark brown. I bled the brakes until the lines had no more brown brake fluid and were cleared up with clean fluid. The master cylinder still has brown residue on the "walls" of it. I will try to clean it with a lint free cloth. Thanks
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post #4 of 4 (permalink) Old 11-29-2010, 11:29 PM
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X2 to fc, the only solvent you want to use is clean brake fluid. Put some on a lint free cloth and wipe the brown film out.

Since your calipers locked up on you, I suggest you pull them apart to clean and rebuild them too.

Gordon

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Purchased May 16, 2008
Approx.19,300km (12,000 miles)

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TOP TEN THINGS A NEW RIDER/OWNER SHOULD DO. Click on link.
https://www.vn750.com/forum/11-vn750-general-discussion/9127-top-ten-items-you-would-suggest-new-owner-do-his-new-ride.html

Last edited by OlHossCanada; 11-29-2010 at 11:32 PM.
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