1980 gl 1100 front master cylinder


Information and questions on GL1100 Goldwings (1980-1983)
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twisp-jd
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1980 gl 1100 front master cylinder

Postby twisp-jd » Tue Aug 06, 2013 7:22 pm



well as a newbie, and before I got to know anything about this wonderful site, a friend suggested that I drill out the little hole in the bottom of the front master cylinder, as the brakes would not release. wrong thing to do ! OK so does anyone know what size this hole should be? I have filled it with JB Weld and ready to make a new hole. I have since read to just clean out the hole with a piece of wire brush wire. After that I was going to buy a rebuild kit then realized that I had ruined it so I ordered a new one off e-bay for $41.85. I wont mention who the seller was, but it only lasted 300 miles and started leaking, well they sent a rebuild kit I installed that and it was leaking again before I got it bled out. so now I am trying to bring the stock one back to life, have ordered the rebuild kit and hoping someone can help. Thanks to all


patience is a virtue we must wait for

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dingdong
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Re: 1980 gl 1100 front master cylinder

Postby dingdong » Wed Aug 07, 2013 7:13 am

Not exactly sure what the right size is but I know it is very small. A wire from a wire brush just barely fits through it. Have you tried e-bay? Good luck.
Tom

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twisp-jd
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Re: 1980 gl 1100 front master cylinder

Postby twisp-jd » Wed Aug 07, 2013 8:42 am

Thanks Ding Dong, I am trying to remember who I lent my small numbered drill set to a few years back, Looks like I'll be buying a new set. I guess I'll just mic a wire and match as close as I can. I appreciate the reply, wish I had tackled this months ago instead of a cheep replacement that leaked and ate the paint on my tank and fering
patience is a virtue we must wait for

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flash2002
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2003

Re: 1980 gl 1100 front master cylinder

Postby flash2002 » Wed Aug 07, 2013 8:44 am

Hi, the size of the hole is 0.17mm

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Wingsconsin
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Re: 1980 gl 1100 front master cylinder

Postby Wingsconsin » Wed Aug 07, 2013 8:55 am

I have a spare OEM on the shelf in decent condition if this doesn't work out for you...
I bought it when we got our 1100 but simply rebuilt the existing one to working condition instead
I have never used it...but it was known good from a part out bike..
Probably a rebuild will be in order to refresh the seals orings ..but it LOOKS good and has an undrilled hole....
Best of luck - PM me if you want my old one....
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Your results may vary. Universal disclaimers apply.


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hrobinson
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Re: 1980 gl 1100 front master cylinder

Postby hrobinson » Wed Aug 07, 2013 3:29 pm

If it was me personally ... I would replace that master cylinder. The reason is you are going to have fine metal filings in the system that will do damage. Now you have used JB weld you don't know where that compound went into your system. Ebay is also a very good resource for GL-1100 master cylinders as well as your local motorcycle salvage yard.

It looks like the calipers are sized. Rebuilding your calipers will probably fix the issue. That is an easy process.

-- Harold




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