Rear Brakes


Information and questions on GL1100 Goldwings (1980-1983)
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1fastgl1100
Posts: 131
Joined: Mon Apr 22, 2013 5:33 pm
Location: Ocala, Florida
Motorcycle: 1983 GL1100A and 1982 GL1100A Modified

Rear Brakes

Postby 1fastgl1100 » Mon Feb 03, 2014 7:09 am



I parked my 82 wing for about 6 weeks and when I went back to it the front brakes seem weak (knew I was low on fluid and pads need to be changed) which was not a big surprise. however, the rears had no pedal at all. and when I checked the fluid level it was all gone. yet there is no puddle below the bike and no one else has had access to it to be playing a joke.. any Ideas???



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newday777
Posts: 507
Joined: Tue Jan 11, 2011 5:21 pm
Location: Milford NH and Oceanside, CA (N San Diego)
Motorcycle: 2008 Cabernet Red. Level 4

1983 GL1100A Wineberry to sell 36,000 miles

1999A Restored and sold at 19,000 miles

1999SE Totaled by cager at 105,000 miles

Re: Rear Brakes

Postby newday777 » Tue Feb 04, 2014 5:29 pm

How are the rear pads? Worn pads and worn rotors (below the minimum thickness) will lower the fluid levels. How long since you have serviced the brake fluids and cleaned the slide pins?

It sounds like you haven't changed the dot4 fluid yearly as is needed in bikes . If you haven't, you will need to pull the calipers apart and clean them out of all gunk and any build up in the seal grooves. You would also be wise to clean the master cylinders. You may need rebuild kits for each caliper and master.

User avatar
1fastgl1100
Posts: 131
Joined: Mon Apr 22, 2013 5:33 pm
Location: Ocala, Florida
Motorcycle: 1983 GL1100A and 1982 GL1100A Modified

Re: Rear Brakes

Postby 1fastgl1100 » Wed Feb 05, 2014 7:30 am

newday777 wrote:How are the rear pads? Worn pads and worn rotors (below the minimum thickness) will lower the fluid levels. How long since you have serviced the brake fluids and cleaned the slide pins?

It sounds like you haven't changed the dot4 fluid yearly as is needed in bikes . If you haven't, you will need to pull the calipers apart and clean them out of all gunk and any build up in the seal grooves. You would also be wise to clean the master cylinders. You may need rebuild kits for each caliper and master.


1st pads are worn but not gone, rotors are new (but not any reason for fluid to be gone) its been about 6 months since brakes were changed (and all calipers rebuilt).
NO! I have not changed the dot4 fluid... 1982 GL1100's use dot3 fluid per the owners manuel.

in six weeks of sitting I would not expect fluid to just evaporate and disappear, yet that is what seems to have happened.

User avatar
newday777
Posts: 507
Joined: Tue Jan 11, 2011 5:21 pm
Location: Milford NH and Oceanside, CA (N San Diego)
Motorcycle: 2008 Cabernet Red. Level 4

1983 GL1100A Wineberry to sell 36,000 miles

1999A Restored and sold at 19,000 miles

1999SE Totaled by cager at 105,000 miles

Re: Rear Brakes

Postby newday777 » Wed Feb 05, 2014 8:06 am

Dot4 has a higher boiling point than Dot3 and can be /should be used on the bikes if you want good brakes in high heat conditions.

The 82 has only the rear caliper on the pedal, it must be leaking out somewhere in the rear system. Have you checked the line from the reservoir to the master cylinder? Have you pulled the bags off and got down close to inspect each line and fittings?
Did you do the "rebuild" you said it had 6 months ago? If someone else did the work, I would be questioning their workmanship. You shouldn't have this problem if they were properly rebuilt that short of time ago.
Last edited by newday777 on Wed Feb 05, 2014 8:13 am, edited 1 time in total.

User avatar
newday777
Posts: 507
Joined: Tue Jan 11, 2011 5:21 pm
Location: Milford NH and Oceanside, CA (N San Diego)
Motorcycle: 2008 Cabernet Red. Level 4

1983 GL1100A Wineberry to sell 36,000 miles

1999A Restored and sold at 19,000 miles

1999SE Totaled by cager at 105,000 miles

Re: Rear Brakes

Postby newday777 » Wed Feb 05, 2014 8:12 am

There is an oring on the plastic nipple on the top of the rear master cylinder that the hose to the reservoir goes into that could be leaking.




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