rear brake pedal spongy


Information and questions on GL1100 Goldwings (1980-1983)
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GEHines2010
Posts: 8
Joined: Tue Oct 05, 2010 7:17 pm
Location: Victoria, British Columbia, Canada
Motorcycle: 1983 GL1100 Aspencade

rear brake pedal spongy

Postby GEHines2010 » Sat Jul 06, 2013 11:03 pm



My rear brake pedalseems to get spngy after I bleed the lines then ride it a while. Last time I noticed the brake fluid low in the reservoir but could not find any leaking anywhere, none on the calipers, none on the ground. So I bled the lines again, noticed some air in the brake fluid, it was milky, and they tightened up. Rode it 400 km today, they seem spongy again. Could the master cylinder be leaking air into the system? Really hard to find leak? Any advice, thoughts would be appreciated.



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RBGERSON
Posts: 2625
Joined: Tue Mar 09, 2010 7:57 am
Location: SCOTTSDALE, AZ
Motorcycle: 98 SE GL 1500
had every year from 75 to 83

Re: rear brake pedal spongy

Postby RBGERSON » Sun Jul 07, 2013 7:50 am

sponge brakes lines = old swelling? replace with braided, or rebuild your master,
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

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WingAdmin
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Posts: 17050
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: rear brake pedal spongy

Postby WingAdmin » Fri Jul 26, 2013 10:44 am

RBGERSON wrote:sponge brakes lines = old swelling? replace with braided, or rebuild your master,


I'd start with replacing the lines, and if that doesn't do it, I'd then rebuild the caliper and the master cylinder, in that order, until the problem is solved.

GEHines2010
Posts: 8
Joined: Tue Oct 05, 2010 7:17 pm
Location: Victoria, British Columbia, Canada
Motorcycle: 1983 GL1100 Aspencade

Re: rear brake pedal spongy

Postby GEHines2010 » Sat Aug 03, 2013 7:40 pm

I had sent in the question about the spongy rear brake pedal. I rebuilt the master cyclinder, that went fine, bled the brakes, again fine, then I noticed a small amount of brake fluid under the center stand. Was able to crawl under the bike, it was on a lift, and I saw some drops of brake fluid appear right at the body of the splitter, (is that what it is called?) when my son pumped the brake pedal.

Didn't notice any fluid on -the lines in and out. I wonder if the splitter body itself could be cracked? I can't even find the part on my regular site I go to, so can't tell if they are available or not. It has these darn torx head bolts, with a pin in the center of the hole, so how do you even get it out.

Has anyone seen this happen before?




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