Would you run this rear rotor?


Information and questions on GL1500 Goldwings (1988-2000)
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Quick Cal
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Joined: Mon Mar 23, 2015 3:24 pm
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Motorcycle: 1989 1500 Goldwing

Would you run this rear rotor?

Post by Quick Cal »



This is on my 89 1500.

I got this bike last year. Had no rear brake pedal at all. Bled it and seemed ok. As time went on I had to push harder on the brake to get anything. Now I have to push fairly hard. Thought I might need new pads.

So I pulled the rear fender off to change the tire. Looked at the brake pads and they look nice and thick. There is some light grooves in the rotor and it has a ridge on the edges.

A new rotor is 7.3 - 7.7 Wear Limit 6.0. Mine measures 6.78. Would you run it?

Obviously I need to look elsewhere for my issue. Thanks


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Sassy
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Re: Would you run this rear rotor?

Post by Sassy »

Reads like it's still thick enough, although I haven't measured it mine looks the same. If it were mine I'd rough up the disc surface with maybe 80 grit sandpaper and new pads. Make sure pistons move freely under pedal pressure.
Enjoying the 2xDarkside
Fred
bbrackett
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Re: Would you run this rear rotor?

Post by bbrackett »

I'm not sure how thick my rear rotor is, but the dealer said my front's were under the 5mm thickness..

I use my Rears a lot, because it also works the front, and I augment with the Front Brake.

I rebuilt my rear caliper when I replaced the rear tire, it helped at lot !!

I should replace the brake lines and I need to rebuild my rear master cylinder or replace it, I think if I do both of those it would help a lot !!
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Re: Would you run this rear rotor?

Post by WingAdmin »

Are you having to press HARDER, or is the brake pedal/lever travelling FURTHER before you get a response?

So the pads and rotor are in good shape. If you haven't already flushed/bled the brakes, that would be my first step, followed by a rebuild of the master cylinder and caliper.
Quick Cal
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Joined: Mon Mar 23, 2015 3:24 pm
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Motorcycle: 1989 1500 Goldwing

Re: Would you run this rear rotor?

Post by Quick Cal »

WingAdmin wrote: Tue Aug 16, 2022 1:02 pm Are you having to press HARDER, or is the brake pedal/lever travelling FURTHER before you get a response?

So the pads and rotor are in good shape. If you haven't already flushed/bled the brakes, that would be my first step, followed by a rebuild of the master cylinder and caliper.
I have to push a lot harder on the foot brake to get anything. I do plan on flushing the system. The caliper is kinda dirty around the pistons. I'm going to clean it before pushing them back in.

So here's something strange. I pulled the pads. They are wearing to fit the shape of the rotor that has the ridges what would be on the outside edge of the pads. The middle of the pads are thicker than the outer 1/4'' towards the edge. If that makes sense? I can hold the pads together and they rock back and forth. The pad surface is not flat. The rotor is not flat. If hold the pads on the rotor they do not rock. The fit the rotor,,,lol.

Question is, is this a problem? I'm sure the BEST thing to do would be new rotor and pads. But man. That's not something I have the cash for right now. I talked to the Honda service department. I did not know at the time anout the pads not wearing correctly. I just told them about the small grooves and ridged edges on the rotor. They said run it,,,lol.

So what do you guys think?








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Sassy
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Re: Would you run this rear rotor?

Post by Sassy »

I think its glazing if the cylinders move smoothly.
Rough up the surfaces some probably be fine.
Enjoying the 2xDarkside
Fred
bbrackett
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Joined: Mon Oct 01, 2018 6:15 am
Location: Sedalia, MO
Motorcycle: 1988 GL1500

Re: Would you run this rear rotor?

Post by bbrackett »

Not sure how you can deglaze the pads & rotor, but I would definitely try
as for the caliper, I would get a rebuild kit, and if you can get it with new pistons

I use my rear brake a lot, but the front's do most of the work on any vehicle.


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