1979 Rear Master Cylinder


Information and questions on GL1000 Goldwings (1975-1979)
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pricey1123
Posts: 52
Joined: Mon Sep 16, 2013 6:11 am
Location: United Kingdom
Motorcycle: 1979 Honda GL1000KZ

1979 Rear Master Cylinder

Post by pricey1123 »



Hello, after alot of head ache with why my rear brake wouldnt bleed is due to the rear master cylinder beening clogged up. whats the best way to clean it out? Also looks like there is alot of debris/old brake fluid that im guessing has gone mouldy haha, best way to describe it is that its like a yellow colour and in clumps if that helps? would blasting it with brake cleaner clean it out and free the clogging?

Many Thanks.


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Placerville
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Joined: Tue Mar 09, 2010 12:58 pm
Location: Placerville, CA
Motorcycle: 1976 Naked Yellow

Re: 1979 Rear Master Cylinder

Post by Placerville »

From the description of your rear M/C's condition, I'm advising you to remove and rebuild it. 'Blasting' it with brake cleaner simply won't do the job right. And, if your rear M/C is in this condition, what's the condition of your front? So, taking this out to it's logical conclusion, I'd advise you to rebuild both and replace your brake lines as well. Brake fluid in the condition you've described will have contaminated your entire system.
Placerville- 1976 Yellow
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dingdong
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Motorcycle: 1976 gl1000
1993 gl1500A
2004 NRX1800 Rune SOLD

Re: 1979 Rear Master Cylinder

Post by dingdong »

Yup! Moisture has gotten in there and now the cylinder walls are probably corroded also.
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pricey1123
Posts: 52
Joined: Mon Sep 16, 2013 6:11 am
Location: United Kingdom
Motorcycle: 1979 Honda GL1000KZ

Re: 1979 Rear Master Cylinder

Post by pricey1123 »

Hello, I handed it over to my local garage to rebuild it since its safety and a major must for correctness. Yup turns out its pretty dirty so I've had new brake lines the rear caliper rebuilt and cleaned as well as the M/C so hopefully tomorrow I can bleed the system.


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