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post #1 of 30 (permalink) Old 06-13-2017, 08:32 PM Thread Starter
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Year: 1981
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Jim's GL1200 - The Diva must have her way - Bleed the clutch

The Diva is being extra bitchy about this. I've got about 12 hours into this so far and I need some help. This is the first motorcycle hydraulic clutch I have owned so I'm not quite sure what I should be looking for. So far I have pulled the master and slave cylinders apart and installed new seals (Tour Max kits). The hard parts were ultrasonically cleaned. Everything was descaled and polished. These are the things I have done to in the order I have done it:
  1. Reverse bleed the clutch. Brake fluid successfully pushed from the slave bleed to the master cylinder. Air remained in the system.
  2. Bled from the master cylinder through bleeder by pumping the clutch and opening and closing the bleeder valve. No fluid flowed.
  3. Bled from the slave bleed valve using a Mighty Mite vacuum bleeder. No fluid would flow and the Mighty Mite would hold 15-20" of vacuum with a slow leak down.
  4. Turned the front wheel all the way to the right. I was able to get fluid to flow and pumped about 200cc of fluid through the slave cylinder. The Mighty Mite would not pull fluid through the slave cylinder bleed valve.
  5. Cracked the master cylinder banjo bolt and bled a burp of air out of that.
  6. Raised the left side of the bike by placing a 5/8" thick piece of plywood under the left leg of the center stand.
  7. Bled another 100 cc of brake fluid through the bleed valve.
The fluid coming through the slave cylinder appears to be fairly clear and no significant air bubbles are coming through. The clutch lever feels mushy and it is difficult to tell if the clutch push rod is moving.
Should I be concerned about the clutch line/hose? The exterior looks like it is in great condition. I have not cleaned the interior. Should it be replaced?
What am I missing? I want this done so I can move on to putting the bike back together. The only thing left after assembly and bleeding is the starter.
Attached Images
File Type: jpg Bleeder bottle.jpg (95.7 KB, 19 views)
File Type: jpg Centerstand.jpg (87.1 KB, 18 views)
File Type: jpg Master Cylinder.jpg (104.7 KB, 20 views)

Jim Palmer
Current rides:
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\'81 GL1100 Std
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post #2 of 30 (permalink) Old 06-13-2017, 08:58 PM
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When you had the master apart did you clean out the tiny hole under the little metal cover inside the reservoir?

Darksider #304 the force is strong in this one.
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post #3 of 30 (permalink) Old 06-13-2017, 09:07 PM Thread Starter
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Dave, yes, I ran the largest guitar string that would fit through it. SOP for this maintenance action.

Jim Palmer
Current rides:
\'85 GL1200I Garage Find
\'81 GL1100 Std
\'72 CB450K5
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post #4 of 30 (permalink) Old 06-13-2017, 09:21 PM
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Just keep bleeding it,sometime it takes a while,does the clutch feel hard after you pump it up? It won't feel like a cable clutch,some of our Semis have hydronic clutches and I almost slam the floor with the pedal but letting off it dosent feel like there's anything there like a mechanical clutch.
Perhaps the clutch is stuck from setting?

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post #5 of 30 (permalink) Old 06-14-2017, 05:22 AM
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Dave, yes, I ran the largest guitar string that would fit through it. SOP for this maintenance action.
I don't think even the smallest guitar string would fit through it. As I said, it is a tiny hole, I can't even see it without magnification.

Darksider #304 the force is strong in this one.
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post #6 of 30 (permalink) Old 06-14-2017, 11:32 PM Thread Starter
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Dave,
Guitar strings are the smallest wires that are easily available. A steel E string is about .007 inches in diameter. I keep them around to clean carb jets.

Jim Palmer
Current rides:
\'85 GL1200I Garage Find
\'81 GL1100 Std
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post #7 of 30 (permalink) Old 06-14-2017, 11:41 PM
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Dave,
Guitar strings are the smallest wires that are easily available. A steel E string is about .007 inches in diameter. I keep them around to clean carb jets.

You can cut a chunk out of an old lamp chord and use one of the strands. Or a piece out of a wire brush.

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post #8 of 30 (permalink) Old 06-15-2017, 05:31 AM
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Quote:
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Dave, yes, I ran the largest guitar string that would fit through it. SOP for this maintenance action.
Quote:
Originally Posted by JamesPal View Post
Dave,
Guitar strings are the smallest wires that are easily available. A steel E string is about .007 inches in diameter. I keep them around to clean carb jets.
OK, if you used an E string it would fit through the return hole, if you used something larger it was the inlet hole.

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post #9 of 30 (permalink) Old 06-15-2017, 07:49 AM
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Those "Divas" can get a little cranky if you do not take care of them..

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post #10 of 30 (permalink) Old 06-15-2017, 11:27 AM
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If you can reverse bleed , - which is a good method in my opinion , and the fluid raise in the reservoir then your return hole for sure is open .Are you sure you have a quality kit for your master and you have it assembled korrekt ?
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