Rebuilding rear master cylinder


Information and questions on GL1200 Goldwings (1984-1987)
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als4life
Posts: 13
Joined: Mon Aug 31, 2009 5:53 pm
Location: Star, NC
Motorcycle: 2005 GL1800

Rebuilding rear master cylinder

Postby als4life » Sun May 27, 2012 5:25 am



Has anyone attempted this? My master cylinder is very spongie and was told it needed a rebuild kit. Went to the local Honda place and bought the kit. Anyone have any pics or step instructions on DIY. Thanks



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seabee_
Posts: 494
Joined: Sun May 29, 2011 8:17 pm
Location: sterling heights, mi
Motorcycle: 1985 Honda Goldwing GL1200
117k miles
1977 Kawasaki kz400
1978 Suzuki GSXr750
1980 Kawasaki GPZ400
1975 Honda CB360T

Re: Rebuilding rear master cylinder

Postby seabee_ » Sun May 27, 2012 5:39 am

Check the how to section for the 1100. The brake rebuild is the same. Spongy brakes could also be because they need to be flushed and bled.
Paul
CE1 Navy Seabees/RET
1981 to 2002
ASE Mechanic

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zamboni920
Posts: 250
Joined: Sun Aug 14, 2011 5:15 am
Location: Stavanger, Norway
Motorcycle: 1996 GL1500 SE with Hannigan 2+2 sidecar

Re: Rebuilding rear master cylinder

Postby zamboni920 » Sun May 27, 2012 5:52 am

This is on my "to-do" list for this weekend, not because of spongy brakes, but my rear caliper is sticking. For a spongy brake, I would suggest flushing and bleeding. Air in the system is the common cause of spongy/soft brakes. Remember, one of the front discs are connected to rear brake, and this front caliper should be bled first.
Of course, if you have the rebuild kit, by all means use it :) .

User avatar
als4life
Posts: 13
Joined: Mon Aug 31, 2009 5:53 pm
Location: Star, NC
Motorcycle: 2005 GL1800

Re: Rebuilding rear master cylinder

Postby als4life » Sun May 27, 2012 6:25 am

Hey thanks for the replies... I was reading the 1100 rebuilding and it pretty much like I though how to do it. Still worried about refilling brake fluid. Using a vac pump.. not sure how to do that. I am now thinking of still doing the rebuild and have the Honda place to refill the fluid back in to make sure I get all the air out of the system out.

User avatar
zamboni920
Posts: 250
Joined: Sun Aug 14, 2011 5:15 am
Location: Stavanger, Norway
Motorcycle: 1996 GL1500 SE with Hannigan 2+2 sidecar

Re: Rebuilding rear master cylinder

Postby zamboni920 » Sun May 27, 2012 6:47 am

Last time I did my rear brakes, I found it easiest to refill/bleed per the manual's instruction.

User avatar
seabee_
Posts: 494
Joined: Sun May 29, 2011 8:17 pm
Location: sterling heights, mi
Motorcycle: 1985 Honda Goldwing GL1200
117k miles
1977 Kawasaki kz400
1978 Suzuki GSXr750
1980 Kawasaki GPZ400
1975 Honda CB360T

Re: Rebuilding rear master cylinder

Postby seabee_ » Sun May 27, 2012 9:15 pm

Filling with fluid and bleeding is easier than you think, especially with the vac bleeder. Give it a shot before taking to the dealer.


Paul
CE1 Navy Seabees/RET
1981 to 2002
ASE Mechanic


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