Rear master cylinder


Information and questions on GL1500 Goldwings (1988-2000)
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exxonthecat
Posts: 11
Joined: Sun Oct 20, 2019 11:21 am
Location: Springfield Missouri
Motorcycle: 76 gl 1000 trike. Gl 1500 build

Rear master cylinder

Post by exxonthecat »



Is there any difference between the left front pressure and the rear/right pressure to the calipers. And which outlet goes to rear/right front
and the left front.
And it's a 2000 se



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bluthundr31
Posts: 561
Joined: Tue Jul 11, 2017 11:43 pm
Location: Morgan Hill, CA.
Motorcycle: 1991 GL1500 Interstate (Cinnamon Beige)

Re: Rear master cylinder

Post by bluthundr31 »

Hmmm, , ,your question seems a bit confused about the brake setup, ,

The front right brake is controlled by the brake lever on the right handlebar and the master cylinder/reservoir there.

The front left brake is linked to the rear brake pedal through the master cylinder behind and below the battery. The rear brake rotor/caliper is on the left side behind the left saddlebag.

The amount of "pressure" the brakes get is dependent on many factors, such as how much pressure is applied to the lever/pedal, ,the condition of the DOT4 fluid, , and the condition of the brake lines to each of the calipers (if they're rubber lines of course). SST brake lines would be less susceptible to "swelling" or "wear" IMHO.

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exxonthecat
Posts: 11
Joined: Sun Oct 20, 2019 11:21 am
Location: Springfield Missouri
Motorcycle: 76 gl 1000 trike. Gl 1500 build

Re: Rear master cylinder

Post by exxonthecat »

Yes. I have trouble explaining my questions.
I'll try again.
The master cylinder has 2 outlets.
One on the top,and another in the middle.
My question is.
The top one goes to the
_____?
One is the for the front and one is for the rear
Plus the hand leaver.
The middle one goes to and works the______?
Two outlets that go to different brake systems.
Just looking for that info.
And thanks for helping.

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wingdings
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Re: Rear master cylinder

Post by wingdings »

try this -

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exxonthecat
Posts: 11
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Location: Springfield Missouri
Motorcycle: 76 gl 1000 trike. Gl 1500 build

Re: Rear master cylinder

Post by exxonthecat »

Thanks man I'm shure these will set me up!

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bluthundr31
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Location: Morgan Hill, CA.
Motorcycle: 1991 GL1500 Interstate (Cinnamon Beige)

Re: Rear master cylinder

Post by bluthundr31 »

There is probably one "input" line from the reservoir to the rear master cylinder, and two "outputs", one to the front left brake and one to the rear left brake. I don't think it matters which line you use for output to front or rear since the master cylinder will put equal "pressure" to each line.

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CrystalPistol
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Location: Shenandoah Valley of Virginia
Motorcycle: 1997 GL1500SE/'98 Lehman Trike

Re: Rear master cylinder

Post by CrystalPistol »

There are 2 brake lines that come off the master cylinder. The rear line is attached to the rear of the master cylinder and is housed in a banjo fitting.


I've seen it written that 60% goes to front brake while 40% goes to rear, but I don't know it to be so. Motor Trike says to swap them in a trike, or they once did, to increase rear braking on pedal.
Make Courtesy your "Code of the Road" …

… & Have a Safe Trip!
:)

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exxonthecat
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Location: Springfield Missouri
Motorcycle: 76 gl 1000 trike. Gl 1500 build

Re: Rear master cylinder

Post by exxonthecat »

That's it! The exact information I was seeking.
I'm building a super trike and using alot of the parts from the original doner bike.
Pretty much everything.
I have two calipers to feed in the back and I will use one outlet per side.
I'll let everyone know how it works out.
Thanks again. exxonthecat

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CrystalPistol
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Location: Shenandoah Valley of Virginia
Motorcycle: 1997 GL1500SE/'98 Lehman Trike

Re: Rear master cylinder

Post by CrystalPistol »

exxonthecat wrote:
Fri Mar 06, 2020 5:17 pm
That's it! The exact information I was seeking.
I'm building a super trike and using alot of the parts from the original doner bike.
Pretty much everything.
I have two calipers to feed in the back and I will use one outlet per side.
I'll let everyone know how it works out.
Thanks again. exxonthecat
If there is a proportioning mechanism in the rear brake master cylinder, your plan will result in a bad sudden pull to one side. Far better to run a tee, split the rear line from the one, even if you do run the fronts both off handle bar MC.


Make Courtesy your "Code of the Road" …

… & Have a Safe Trip!
:)

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