Rear and front brake master leak

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Oct 20, 2012 | 01:58 PM

WVNightster

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Road Captain

Joined: Jun 2010

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From: West Virginia

Rear and front brake master leak

Hey guys I noticed the other day that my front master cylinder was showing signs of a leak.I thought I would check the rear and sure enough the rear master is leaking too.Called my dealer and was told it was probably coming through the vents but to bring it in for them to look it over.Anyone else noticed this on 2012 Dyna's(Mines a Wide Glide)?

Oct 20, 2012 | 02:50 PM

Stag556

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Joined: Oct 2011

Posts: 827

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From: NJ

I have noticed the same issue on my current bike, my precious super glide and all my friends Harley's. it seems they over tighten the screws from the factory, causing the gasket to protrude from the master cylinder.

Oct 20, 2012 | 06:26 PM

BLK107

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Joined: Oct 2011

Posts: 52

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From: Connecticut

Common problem, supposedly fixed now. I have a '10 wide glide and am on my second replacement reservoir cap and gasket. The newest cap and gasket (which I believe is attempt number two or three by HD to fix the issue) I have hasn't leaked yet- knock on wood...

Oct 20, 2012 | 07:46 PM

seniorsuperglideE8

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Joined: Jan 2007

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From: along the shore of Mishigami

The rubber gaskets on my res. only need 8 inch lbs of torque, in other word just a slight compression. Wipe the surfaces dry and just snug them down.

Oct 21, 2012 | 04:13 AM

markkoby

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Joined: Mar 2011

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When I re-did my brake fluit I did not over fill and washed the rubber casket in warm soapy water. When dry I carefuly tighten the tops back on evenly and not much torque. No leaks in over a year.

Oct 21, 2012 | 06:26 AM

WVNightster

Thread Starter

Road Captain

Joined: Jun 2010

Posts: 561

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From: West Virginia

Thanks for the replies,as Stag said it seems to be overtorqed from the factory.The inner side looks to be squished out and kinda deformed while the outer side looks to be ok(no protrusion)on the front.Hell I would fix it but it's still under warranty and my dealers service dept. has done me right on other occasions,I'll just let them handle it.Besides the bike needs a good scrubbin and they always clean er up after any service lol.

Oct 21, 2012 | 06:49 AM

craig11dyna

Tourer

Joined: Apr 2011

Posts: 348

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From: Jensen Beach Florida

Same issue on my 11 Dyna. Going out to take the cap off and wipe clean and reinstall with very little torque. Thanks for the info. Good thread.

Just a reminder to cover that tank if you remove the cover. Brake Fluid vs paint = no paint!

Last edited by craig11dyna; Oct 21, 2012 at 08:41 AM.

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Oct 22, 2012 | 05:37 PM

cee

Cruiser

Joined: Nov 2011

Posts: 169

Likes: 12

From: alberta

Picked up a new cap/seal for the front recently and notice the back leaking now. Seems to be pretty common. I used the loctite blue when I changed the front-no leaks so far.