Searching for a Rear Brake Master Cylinder


Information and questions on GL1100 Goldwings (1980-1983)
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Goldskooler
Posts: 15
Joined: Sun Aug 20, 2017 5:44 pm
Location: Bellefontaine Ohio
Motorcycle: 1983 GL1100A Aspencade

Searching for a Rear Brake Master Cylinder

Post by Goldskooler » Wed May 23, 2018 2:31 pm



Hello,

Well, my 83 Aspy finally gave out, on it's brakes, or what was left of them. Bought 2 repair kits from K and L, for the rear caliper, and the rear brake. Well, cut a long story short, I need another rear brake kit. The cylinder itself is pitted at both ends, and tearing up seals and sucking air.

So..I know and appreciate these things are incredibly hard to find in any condition. If anyone has one that holds pressure, and works, I'm interested.

Many thanks

Jaime



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jeffcosmo
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Location: Burlington, WI (Honey Lake)
Motorcycle: 1983 GL1100 Aspencade
1983 GL1100 Aspencade
1983 GL1100 Aspencade (parts bike)

Re: Searching for a Rear Brake Master Cylinder

Post by jeffcosmo » Thu May 24, 2018 1:02 am

What IS it that you want?? Rear caliper?? Master cylinder?? Hoses?? Rubber lines??
Sorry, can't tell exactly from your post.

Cosmo

P.S. I may have good ones...

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Goldskooler
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Location: Bellefontaine Ohio
Motorcycle: 1983 GL1100A Aspencade

Re: Searching for a Rear Brake Master Cylinder

Post by Goldskooler » Thu May 24, 2018 7:35 pm

Cosmo,

Thanks for the help. What I'm after specifically, is the rear master cylinder housing itself, and the main push rod. Everything else, I have, or can get hold of.

I'm up at Ohio bike week at the moment, so if you can help, I'll reply as quickly as I can. But thank you.

If I've missed details, let me know.

Thanks

Jaime

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jeffcosmo
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Location: Burlington, WI (Honey Lake)
Motorcycle: 1983 GL1100 Aspencade
1983 GL1100 Aspencade
1983 GL1100 Aspencade (parts bike)

Re: Searching for a Rear Brake Master Cylinder

Post by jeffcosmo » Thu May 24, 2018 8:44 pm

Let me see how good the one is that is still one the parts bike.

Cosmo

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madmtnmotors
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Location: Saint Cloud, Florida
Motorcycle: 1984 Goldwing

Re: Searching for a Rear Brake Master Cylinder

Post by madmtnmotors » Fri May 25, 2018 8:35 am

Goldskooler,
Bellefontaine? Holy cow, I grew up there!

If Cosmo doesn't have a useable one then I'll see what I've got. Hope your bike week outing goes well.
Wilbur


Sent from my Tandy TRS-80! :ugeek:

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Goldskooler
Posts: 15
Joined: Sun Aug 20, 2017 5:44 pm
Location: Bellefontaine Ohio
Motorcycle: 1983 GL1100A Aspencade

Re: Searching for a Rear Brake Master Cylinder

Post by Goldskooler » Mon May 28, 2018 9:59 am

Morning folks,

Bike week was very good, however it is a giant Harley Fest for the most part. We rode up there, with a few friends. One of my friends, has a chopper with a 76 500T Honda engine. And the rear wheel he used, is the type that has a 2.5” circlip to hold the whole thing together. Well that collapsed on the way up.

Cut a long story short, we ended up going through a junk yard, that had trees growing through some frames. “Bike 101” was the place, guy called Randy. We cobbled something together, and while I was there, I looked through the Goldwing shelves / shed. Not a damn thing with master cylinders..gahhh

Anyway, I’m rambling. If anyone does have a body and stem for my Aspencade, it’s still needed.

KL kit 32-4272 has already arrived. I’ll be up at AMA vintage days in July, probably searching (along with others) for this elusive part.

Jaime

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jeffcosmo
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Location: Burlington, WI (Honey Lake)
Motorcycle: 1983 GL1100 Aspencade
1983 GL1100 Aspencade
1983 GL1100 Aspencade (parts bike)

Re: Searching for a Rear Brake Master Cylinder

Post by jeffcosmo » Mon May 28, 2018 10:58 pm

Sorry I've been slow. Had my daughter's Camry to repair/restore. It had electronic transmission issues, now resolved.

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Goldskooler
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Re: Searching for a Rear Brake Master Cylinder

Post by Goldskooler » Wed May 30, 2018 6:29 pm

No rush, these things never get done overnight.

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madmtnmotors
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Re: Searching for a Rear Brake Master Cylinder

Post by madmtnmotors » Tue Jun 05, 2018 9:12 pm

Mines not looking too good. Looks like the backing plate will have to be cut/ground in order to get the circlip out. Once the piston is freed I'll be able to better assess its condition.
Wilbur


Sent from my Tandy TRS-80! :ugeek:

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Goldskooler
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Location: Bellefontaine Ohio
Motorcycle: 1983 GL1100A Aspencade

Re: Searching for a Rear Brake Master Cylinder

Post by Goldskooler » Wed Jun 06, 2018 8:24 pm

Ok.. we hope for the best, and work with what we get. Thank you for the update. I'm still searching as well.

Jaime

mxwllslvrhmr
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Location: California
Motorcycle: '81 GL 1100

Re: Searching for a Rear Brake Master Cylinder

Post by mxwllslvrhmr » Thu Jun 07, 2018 2:55 pm

It's possible you may be able to send out the master cylinder for resleeving of the bore with stainless steel inserts. This is done to older Corvette brake calipers to fix the same problem; i.e., pitted bores. . Master cylinders can also be resleeved to maintain originality.
A good machine shop should be able to handle this kind of work, as well.
John

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Goldskooler
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Motorcycle: 1983 GL1100A Aspencade

Re: Searching for a Rear Brake Master Cylinder

Post by Goldskooler » Fri Jun 08, 2018 10:59 am

Its an option, I'm leaning more towards actually. Didn't realise how impossible this part, is to find. I've got a few leads, and then I'm looking at alternatives, such as re sleeving.

It will be a runner, just a question of patience. Thanks for everyone's advice over this issue.

Jaime

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jeffcosmo
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Motorcycle: 1983 GL1100 Aspencade
1983 GL1100 Aspencade
1983 GL1100 Aspencade (parts bike)

Re: Searching for a Rear Brake Master Cylinder

Post by jeffcosmo » Sat Jul 07, 2018 10:03 pm

Got the parts bike stripped. Rear master looks bad, though I've not tried everything i know to bring it back.

Cosmo

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jeffcosmo
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Location: Burlington, WI (Honey Lake)
Motorcycle: 1983 GL1100 Aspencade
1983 GL1100 Aspencade
1983 GL1100 Aspencade (parts bike)

Re: Searching for a Rear Brake Master Cylinder

Post by jeffcosmo » Sun Jul 08, 2018 6:02 pm

Worked on the rear master for a couple hours today. Brought it back, wasn't as bad as it looked.
So, it's a good master, all good internals, bit of rust on the pushrod and a 5mm tear on the boot. Otherwise, it works as it should.
$50 plus shipping.



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