Need rear brake rotor for 83 GL1100


Information and questions on GL1100 Goldwings (1980-1983)
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BigSwede
Posts: 48
Joined: Fri Dec 02, 2011 11:26 pm
Location: Sunnyvale, CA
Motorcycle: 1983 Gl1100

Need rear brake rotor for 83 GL1100

Postby BigSwede » Sun Sep 18, 2016 9:01 pm



Changed my rear brake pads today, here's what they looked like:



So you can guess what the rotor looks like! These were OEM pads from Honda, they lasted less than 10,000 miles. I don't know if that's normal or not. Has anybody tried the new replacement rotors from EBC? I see a lot of them on eBay. Or should I try to find a good used one?

thanks,

Mark


Current:
83 GL1100 Interstate
Past:
76 GL1000
74 Honda CB350
86 Honda Elite 250
85 Yamaha Riva 175
82 Yamaha Seca 650
76 Yamaha RD400

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chrisz
Posts: 77
Joined: Thu Jun 18, 2015 8:19 pm
Location: Cambridge Ontario
Motorcycle: Honda GL1100 year 1983
Triumph Tiger 1050 year 2008

Re: Need rear brake rotor for 83 GL1100

Postby chrisz » Mon Sep 19, 2016 8:42 am

Your rear pads look badly worn after only 10K miles, makes me think you have a caliper that is not fully retracting. As for the rotors, either will work, but I don't have any experience with EBC rotors, I just use their pads.

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roadwanderer2
Posts: 4111
Joined: Thu Aug 08, 2013 4:03 am
Location: sweetwater, Tennessee
Motorcycle: 83 GL1100A aspencade, previously owned, 1981 honda GL500i silverwing interstate, 1974 yamaha xs400, 1974 Honda cb450 twin cam, 1983 honda vt30, 1982 honda 700 shadow, 1972 cb750four, and my first bike, a brand new 1982 honda CM400e. and a new to me 1986 GL1200 aspencade SEi
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Re: Need rear brake rotor for 83 GL1100

Postby roadwanderer2 » Mon Sep 19, 2016 8:52 am

which pad was on the outboard side, the one with no pad on it or the one with a little pad on it.

stuart.

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BigSwede
Posts: 48
Joined: Fri Dec 02, 2011 11:26 pm
Location: Sunnyvale, CA
Motorcycle: 1983 Gl1100

Re: Need rear brake rotor for 83 GL1100

Postby BigSwede » Mon Sep 19, 2016 9:38 am

The one that's down to the metal is the outboard side
Current:
83 GL1100 Interstate
Past:
76 GL1000
74 Honda CB350
86 Honda Elite 250
85 Yamaha Riva 175
82 Yamaha Seca 650
76 Yamaha RD400

User avatar
BigSwede
Posts: 48
Joined: Fri Dec 02, 2011 11:26 pm
Location: Sunnyvale, CA
Motorcycle: 1983 Gl1100

Re: Need rear brake rotor for 83 GL1100

Postby BigSwede » Mon Sep 19, 2016 10:06 am

I guess before I go buying a new rotor, I should go out there with a micrometer & see if there's emough left of it that it can be resurfaced. Of course I didn't think of that before putting the saddlebag back on :(
Current:
83 GL1100 Interstate
Past:
76 GL1000
74 Honda CB350
86 Honda Elite 250
85 Yamaha Riva 175
82 Yamaha Seca 650
76 Yamaha RD400

User avatar
roadwanderer2
Posts: 4111
Joined: Thu Aug 08, 2013 4:03 am
Location: sweetwater, Tennessee
Motorcycle: 83 GL1100A aspencade, previously owned, 1981 honda GL500i silverwing interstate, 1974 yamaha xs400, 1974 Honda cb450 twin cam, 1983 honda vt30, 1982 honda 700 shadow, 1972 cb750four, and my first bike, a brand new 1982 honda CM400e. and a new to me 1986 GL1200 aspencade SEi
Contact:

Re: Need rear brake rotor for 83 GL1100

Postby roadwanderer2 » Mon Sep 19, 2016 10:11 am

ok, usually when the outboard pad is down to the metal, it comes from the caliper hardware being stuck and not letting the caliper slide back and forth.

recommend taking some emery cloth,(fine) and sanding down all the hardware, pins, slides, bolts, (except for the threads). and the spring clip where the tops of the pads rest on inside the top of the caliper and the caliper itself where any part of the pads rest up against. get some disk brake lube and lube up all the hardware, including the back sides of the pads to prevent "brake squeal". also check to see if your caliper piston is seized inside the housing while you have it off the bike and will not retract back into it. if it is seized, you'll have to remove the piston and again using emery cloth,(fine), to remove any corrosion or scratches, sand down the outside of the piston and replace the seals and boots. make sure you clean the ridges where the seals and dust boot sit and check the rubber bolt boots to see if they are still usable. if not, replace them. reinstall, fill master with fresh fluid and bleed. you'll have to bleed, i believe its the right front caliper also and the rear caliber as they are linked. bleed the front one first, then the rear. always bleed the caliper thats farthest away from the master cylinder first. if you get any brake fluid on the new pads, spray them down immediately with some "break cleaner" and sand them down to get a clean surface again. if you don't, the new pads will be ruined. the brake fluid will soak into the new pads and never come out.

hope this helps you.

stuart.

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roadwanderer2
Posts: 4111
Joined: Thu Aug 08, 2013 4:03 am
Location: sweetwater, Tennessee
Motorcycle: 83 GL1100A aspencade, previously owned, 1981 honda GL500i silverwing interstate, 1974 yamaha xs400, 1974 Honda cb450 twin cam, 1983 honda vt30, 1982 honda 700 shadow, 1972 cb750four, and my first bike, a brand new 1982 honda CM400e. and a new to me 1986 GL1200 aspencade SEi
Contact:

Re: Need rear brake rotor for 83 GL1100

Postby roadwanderer2 » Mon Sep 19, 2016 10:18 am

BigSwede wrote:I guess before I go buying a new rotor, I should go out there with a micrometer & see if there's emough left of it that it can be resurfaced. Of course I didn't think of that before putting the saddlebag back on :(


disk thickness is 6.9 to 7.1 mm or 0.27 - 0.28 in.
service limit for the rotor is 6 mm or 0.24 in.
max disk runout is 0.3 mm or 0.01 in.

stuart.




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