rear brake binding on 82 gl1100


Information and questions on GL1100 Goldwings (1980-1983)
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red dog
Posts: 27
Joined: Sun Oct 18, 2009 12:01 pm
Location: sanford,fl.
Motorcycle: 1982 gl1100

rear brake binding on 82 gl1100

Postby red dog » Sat Jan 17, 2015 1:17 pm



I am NO mechanic, but with this site I've been able to keep "Sweetie" running good. Since I had the bike(50K miles I put on her) I've had trouble with the rear brake sticking. I rebuilt the caliper twice, the last time about 8k miles ago along with it I put 2 new pistons in. A few thousand miles before that I replaced the rear master cylinder. After the new pistons it was fine until now. I took the caliper off and cleaned the pistons without removing them all the way. I notices they are yellowish and not silver anymore. I don't know if that means anything. Anyway I put it back together and still the same problem. I cleaned the pinhole like it said for the 1200 but that did nothing either. I want to ride to Key West in a few weeks so I have to get this fixed once and for all. Thanks for all the help. It's 70 degrees today too...it pisses me off enough to want to get another bike



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RoadRogue
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Re: rear brake binding on 82 gl1100

Postby RoadRogue » Sat Jan 17, 2015 4:30 pm

The rubber brake line itself may be the problem. It may have broken down internally acting like a one way valve. Replace the 32 year old rubber line with braided stainless lines and you will be amazed at how good your brakes can be. See the post at the top of the for sale section, Andy will set you up with what you need. I have them on both my 1100 and 1500 8-)
Ride safe, Todd
Over night campers welcome

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tom84std
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Re: rear brake binding on 82 gl1100

Postby tom84std » Sat Jan 17, 2015 6:48 pm

Roadrogue is correct, however I've experienced another problem it could be as well. Inside the master cylinder there is a tiny orifice which vents the hydraulic system when the brakes are not applied. It's in the cylinder body and the piston passes by it. When the piston is in a neutral (brake off) position, the piston is positioned behind the hole and the system is open to the reservoir. When mine had problems, the hole had become clogged with a grain of sand or other debris and would not bleed down after the brake was released. I cleared it with a sewing needle and flushed the system with fresh fluid.

olchris
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Re: rear brake binding on 82 gl1100

Postby olchris » Sat Jan 17, 2015 7:07 pm

tom84std wrote:Roadrogue is correct, however I've experienced another problem it could be as well. Inside the master cylinder there is a tiny orifice which vents the hydraulic system when the brakes are not applied. It's in the cylinder body and the piston passes by it. When the piston is in a neutral (brake off) position, the piston is positioned behind the hole and the system is open to the reservoir. When mine had problems, the hole had become clogged with a grain of sand or other debris and would not bleed down after the brake was released. I cleared it with a sewing needle and flushed the system with fresh fluid.


Yes agreed, and or the piston "shaft" may not be returning far enough when the brake pedal is released, the pressure is released ... Could just be an adjustment issue...

red dog
Posts: 27
Joined: Sun Oct 18, 2009 12:01 pm
Location: sanford,fl.
Motorcycle: 1982 gl1100

Re: rear brake binding on 82 gl1100

Postby red dog » Sat Jan 17, 2015 8:19 pm

My lines look brand new but I ordered a new set of braided lines from ebay for $60. I won't be riding for a week at least. Thanks for the advice.

4wred
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Re: rear brake binding on 82 gl1100

Postby 4wred » Sun Jan 18, 2015 11:06 am

Not sure but I think the reason your pistons changed color is because they were overheated from the brakes dragging??

red dog
Posts: 27
Joined: Sun Oct 18, 2009 12:01 pm
Location: sanford,fl.
Motorcycle: 1982 gl1100

Re: rear brake binding on 82 gl1100

Postby red dog » Sun Jan 18, 2015 4:14 pm

That's what I was thinking.




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