bleeding rear on 95 gl1500


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bleeding rear on 95 gl1500

Postby tbump » Sat Jul 09, 2011 6:19 pm



new here but not to twisting a wrench. trying to bleed rear break. i know it is linked to front left. i did bleed that first. i can not get the rear to clear the air. is there a hidden bleeder where they link together? if so where is it. if not,, what the heck is the trick to bleeding the rear?? thanks in advance for any help>>>>. tom


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Re: bleeding rear on 95 gl1500

Postby LowellO » Sat Jul 09, 2011 11:17 pm

Gotta 93 having the same problem, tried everything I could find here and other sites no luck. Not new to turning wrenches either Tom, I've even rebuilt the master cylinder, glad to see it's not just me. Welcome aboard Tom! I hope we both can figure something out soon, my wife is ready to go riding on this thing!
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Re: bleeding rear on 95 gl1500

Postby keithg64 » Sat Jul 09, 2011 11:43 pm

I sucked out the fluid on the rear master with a eye dobber and filled it with new oil then put a hose on the bleeder and just let gravity flow the fluid till clean fluid can out.
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Re: bleeding rear on 95 gl1500

Postby talob » Sun Jul 10, 2011 6:57 am

A yearly thing on my 95 SE is bleeding the rear brake, somehow it gets an air bubble in it fortunetly havent had your problem with it yet. But I remember years ago with a Yamaha 650 I had I couldent bleed the front brake had a air bubble stuck in it ended up forceing fluid from the bleeder up to the resivour it worked then, it's a thought if all else fails. :D
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Re: bleeding rear on 95 gl1500

Postby tbump » Sun Jul 10, 2011 8:47 am

I called the Honda shop (where i bought the bike in 95) service guy said there is a "hidden" bleeder where the linked front and rear meet. service manual makes no mention of this. he said to bring it in because there is a 6 step process to getting it done.somehow I don.t believe him. why should it be so hard to bleed a brake. PS: I also have a re-built master in the rear. Tom
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Re: bleeding rear on 95 gl1500

Postby LowellO » Sun Jul 10, 2011 11:30 am

On my 93, I have found that the brake line was CLOGGED. Bike has sat for 4 years. any way I've got the back line off and cleaning it out now. Don't know how long or if yours has sat Thump, but my problem was a clog. I saw no hidden bleeder or proportioning valve. Line comes off banjo fitting on master cylinder and goes to rear and another line goes to the front. Thank God my wife doesn't mind turning a wrench she has been a great help!
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Re: bleeding rear on 95 gl1500

Postby HillVR » Sun Jul 10, 2011 2:46 pm

just picked up a 93 and had to have the rear/ front left bled. Honda has a sequential bleeder tool. $85 bucks and well worth the money.
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Re: bleeding rear on 95 gl1500

Postby LowellO » Sun Jul 10, 2011 4:01 pm

Well, found out my resevoir cap is not sealing, so no riding today. That will cause a problem to not let them bleed all the way out because she can't build up pressure. There's another thing to check Tbump.
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Re: bleeding rear on 95 gl1500

Postby MikeB » Sun Jul 10, 2011 4:19 pm

I think you may be mistaken about the reservoir cap.

Well, found out my reservoir cap is not sealing, so no riding today. That will cause a problem to not let them bleed all the way out because she can't build up pressure. There's another thing to check Tbump.


I'm not an expert on brakes by any means but I really don't believe the reservoir cap has anything to do with building pressure or brake bleeding. The pressure is generated in the spool valve in the master cylinder bore. The reservoir cap is there to keep fluid in and dirt and other contaminants out.

If you are having bubbles coming out through the line you have connected to the bleed valve while you are using a Mity-Vac or similar vacuum bleeder, you don't necessarily have air in the system. More than likely you have air passing by the threads of the bleed valve. Put some grease around the threads where the bleed screw goes into the caliper. If that doesn't work, remove the bleed screw and wrap some Teflon tape around it and reinstall and try again. That should pretty much guarantee that you are not passing air past the bleed screw threads.

If you are having bubbles coming out through the line that is connected to the bleed valve while using brake pedal pressure to bleed the brakes then yes, you do have air in the line. One thing that I have heard is that there is a way to get the bubble out. With the system closed for normal operation, place a weight on the brake peddle (or strap the brake handle to the handlebar) so that the brakes are applied. Let it set over night and then remove the weight or strap. I can' not verify that this actually works but I have heard of some that used this method and were pleased with the results.
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Re: bleeding rear on 95 gl1500

Postby talob » Sun Jul 10, 2011 6:43 pm

Thump, i've got my bike down right now back wheels off exhaust system off and all the bottom painted parts, now I know I'm not the greatest wrench in the world but I can't even find this "hidden" bleeder, it's really hidden so if you could find it how could you ever get to it to use it.
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Re: bleeding rear on 95 gl1500

Postby MikeB » Sun Jul 10, 2011 6:57 pm

Sorry guys, that magical hidden bleeder valve doesn't exist except in the mind of some "service guy" who "said there is a "hidden" bleeder where the linked front and rear meet." I do believe he is just trying to relieve you of your money rather than be a straight shooter.
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Re: bleeding rear on 95 gl1500

Postby LowellO » Sun Jul 10, 2011 9:58 pm

Hey MikeB you are absolutely correct about the bleeder(at least on 93) I've had my entire back brake system down and no hidden bleeder. Thanks for the tip on the air in the line. The only reason I said what I said is because I can hear the air and see the fluid leaking back out of the resevoir when pumping to bleed, but you make a great point and I may just try that. Thanks!


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