gl1100 rear brake master cyl options "those are rare hard to find parts"

[82a]

dan filipi » Fri Oct 11, 2013 9:25 am[/url]":8scbthk0]
A big problem only getting worse is the aluminum around the spring clip is corroding away.
This spring clip acts as a pedal up stop.
Bad design because if that spring clip pops out, so does the piston and you loose your rear brakes.

not only that but it also enclosed by a rubber part in who knows what kinda shape,

even if in good shape, water/moisture can get in/trapped leading to major corrosion issues and eventually the clip popping out,

anyone can and should have a look at what shape there's is in, there have been many reports of failure in use

 

[dan filipi]

82a » Fri Oct 11, 2013 8:57 am[/url]":374g02hf]

dan filipi » Fri Oct 11, 2013 9:25 am[/url]":374g02hf]
A big problem only getting worse is the aluminum around the spring clip is corroding away.
This spring clip acts as a pedal up stop.
Bad design because if that spring clip pops out, so does the piston and you loose your rear brakes.

not only that but it also enclosed by a rubber part in who knows what kinda shape,

even if in good shape, water/moisture can get in/trapped leading to major corrosion issues and eventually the clip popping out,

anyone can and should have a look at what shape there's is in, there have been many reports of failure in use

Yes, very good advise.

This very thing happened on ansimp's "rat's nest".

 

[Dusterdude]

That bad boy looks like the one on my cbr

 

[westgl]

I just won a 02' GL1800 Rear brake master, for $32.00, Ebay, it came with fluid reservoir.

I will put that on my 83' GL1100

 

[82a]

this link shows the mods [pix too]
https://www.ngwclub.com/forum/viewtopic. ... b7#p467765

 

[westgl]

Thanks

82a » Sat Oct 12, 2013 7:02 am[/url]":jywm5egq]
this link shows the mods [pix too]
https://www.ngwclub.com/forum/viewtopic. ... b7#p467765

 

[82a]

looks like the mod was done on a pre 83 unlinked gl11

After a few miles warming up the pads and seating them, the rear brake felt just fine.

yours'd be a first known linked setup report if going that way

 

[westgl]

I would think it should work fine for the linked setup to.

I did not check the piston size on the 83' GL1100 vs the GL1800

GL1100 Brake Master piston size
80-82' 13.957-13.984 (0.5495-0.5506)
83' 15.827-15.854 (0.6231-0.6242)

 

[82a]

i'm not familiar with the gl18 setup other than basics and linked,

you would think that master might be too much for a rear brake only setup but the ride report is good

 

[westgl]

Yes the ride report was good.

I think Honda came up with the linked Brakes as early form of early ABS, so that the front brakes would be harder to lock in a Panic situation.

The rear Brake alone with a GL1800 rear brake master on a 80' GL11, maybe much easier to lock up the rear wheel than with the stock 80-82' GL11 rear brake master.

Larger Piston means more brake power and can be less force, when you start to go too big a piston, then force becomes harder but more powerful brake, Maybe too much power.

He did not say what they were like in a panic stop.

Or if he could lock the rear brake up easier than before.

82a » Sat Oct 12, 2013 7:33 am[/url]":2tl7wbsu]
i'm not familiar with the gl18 setup other than basics and linked,

you would think that master might be too much for a rear brake only setup but the ride report is good

 

[82a]

i think with alot of these changes, no one really knows how it will really work and then preferences can come into it,

i prefer a de linked setup and have read some reports that linked works great on pavement but one dude went down on the shoulder (pulling off) of a road when the front locked up

my pedal for the rear is way too soft for my liking but is original, so might just need new seals, a brake flush that it needed didn't make much diff

i doubt i could lock up the rear as is and lotsa travel (for me anyway) even after a good bleed, floorboards don't help (get in the way for a good stomp) with the stock brake pedal location

fronts are great more on the sensitive side requiring little effort for solid results

 

[westgl]

See below for Piston size comparison

westgl » Sat Oct 12, 2013 7:26 am[/url]":2nuchsb9]
I would think it should work fine for the linked setup to.

I did not check the piston size on the 83' GL1100 vs the GL1800

GL1100 Rear Brake Master piston size
80-82' 13.957-13.984 (0.5495-0.5506)
83' 15.827-15.854 (0.6231-0.6242)

GL1800 Rear Brake Master piston size
13.957-13.984 (0.5495-0.5506)

 

[westgl]

The GL1800 piston size is the same as the 80-82' GL1100

But the GL1800 piston size, is slightly smaller than the 83' GL1100

OP said the Piston on the GL1800 was larger, guess maybe his info was Not correct or maybe guessing.

Here is where i got the GL1800 Piston info

https://www.goldwingfacts.com/forums/2-g ... ost2587521

I have a GL1800 service manual But i cannot find it, since the move

 

[82a]

looks like that's for the front, rear is 17.417-17.444

edit - i don't know what that 'secondary rear master' is about but it also shows
13.957-13.984 (0.5495-0.5506)

 

[westgl]

Front Brake Master Piston size is the same for all GL1100's

This means de-linking could be done very easy.

 

[westgl]

crud did i read the wrong info?

 

[82a]

westgl » Sat Oct 12, 2013 12:37 pm[/url]":df7cd5g1]
Front Brake Master Piston size is the same for all GL1100's

This means de-linking could be done very easy.

i'd have to look it up i thought the front was diff for 83, it only needs to work one front disk vs 2 for earlier

then you also had dual and single piston scenarios

 

[westgl]

Thanks 82a

These new eyes are hard to get used to.

A seconds set of eyes sometimes helps

So the primary Piston is larger, Great!!

The secondary Brake master sounds like a ABS unit.

But i will find out

 

[82a]

westgl » Sat Oct 12, 2013 12:44 pm[/url]":23utw5wg]
Thank 82a

These new eyes are hard to get used to

So the primary Piston is larger, Great!!

The secondary Brake master sounds like a ABS unit.

But i will find out

i'm guessing the secondary goes to the rear for gl18 and prob a Y splitter there somewhere, but dunno for sure

i was quite surprised at the 83 linked system when i found out the details and pretty sure it doesn't have a rear secondary master

 

[westgl]

There is a front and a rear Brake master cyl. for the Rear coupled braking

The front Brake Master for the Rear/Front coupled braking is down by the front wheel, left fork leg, for the linked braking on the GL1800.

If my memory is correct, I sold My GL1800 a few years ago