Bleeder Valves


Information and questions on GL1500 Goldwings (1988-2000)
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guitarzan
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Bleeder Valves

Post by guitarzan »



Hi,
Can anyone tell me if the rear bleeder valve is a smaller size then the front bleeder valves? I rebuilt the rear caliper and I'm trying to bleed the brakes and that's when I found out the rear is a 7mm. The other thing is the rear bleeder valve is kind of loose in the caliper. I have it open just a crack and it wiggles around in the caliper and is sucking air. Why would it be loose in the caliper? I know its not broken.

Would anyone know of an Auto bleeder valve that would fit as a cross reference to the bleeder valve for a 1994 Goldwing SE 1500 ? I would like to get one so I can get the rear end of the bike back down and in place.

Thank you

Frank


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MikeB
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Re: Bleeder Valves

Post by MikeB »

The bleeder valves are all the same thread size, 8 x 1.25 millimeters.
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guitarzan
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Re: Bleeder Valves

Post by guitarzan »

Thank you MikeB.
So someone has put a smaller bleeder valve in there. That must be why when I loosen the valve just a little it wiggles around and sucks air. Ya think?

Thanks
Frank
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Re: Bleeder Valves

Post by MikeB »

Not necessarily a smaller bleeder valve. The wrench size for the valve is not necessarily an indicator of the thread size. Any 8 x 1.25 bleeder should fit. I believe just about any auto parts dealer will have them in that size. Autozone NAPA, O'Reily to name a few.
Personally, I use the Speed Bleeders in my applications on both my wings. I buy them on Ebay. If you are okay with Ebay, here is a really reliable vendor. Look for Item number 391586235212 when you do a search of Ebay.
MikeB
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guitarzan
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Re: Bleeder Valves

Post by guitarzan »

That sounds real good to me. Thank you again.

Frank
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guitarzan
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Re: Bleeder Valves

Post by guitarzan »

I ordered them.

Thanks
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Re: Bleeder Valves

Post by WingAdmin »

That's right. The thread size is the same, but for whatever reason, the wrench size is different on the rear caliper bleeder compared to the front. Who knows why they did that?? Perhaps a different vendor during manufacturing?
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Re: Bleeder Valves

Post by NVSB4 »

I see that there are different lengths of these.
Does it matter?
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Re: Bleeder Valves

Post by MikeB »

For the brakes, the short ones are okay. But the longer one, the LL, is needed for the clutch.
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guitarzan
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Re: Bleeder Valves

Post by guitarzan »

I ordered a pack of 4 of them and it suppose to include one for the clutch. It didn't specify that the one for the clutch is different. Maybe it will on the package. So that 7mm for the rear bleeder valve is right? I still don't understand why its so sloppy in the caliper. That kind of bothers me. Well I have the new valves coming in.

Thanks
Frank
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OldbikerJames
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Re: Bleeder Valves

Post by OldbikerJames »

Thanks for this post. I was needing info on bleeder screw sizes. Clutch bleeder screw are the same size? Think I'll replace them all. Fixing up a 1990 SE.
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Re: Bleeder Valves

Post by MikeB »

OldbikerJames wrote: Tue Mar 23, 2021 10:30 am Thanks for this post. I was needing info on bleeder screw sizes. Clutch bleeder screw are the same size? Think I'll replace them all. Fixing up a 1990 SE.
The clutch bleed screw is the same thread but it is about twice the length as the rest of them.
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Re: Bleeder Valves

Post by OldbikerJames »

Looked at my rear bleeder screw, completely rounded. Bought some new bleeder screws thanks to the gentleman above stating the size. I used a pair of vice grips, tight as I could get them, it wont budge. Even started coming apart. Any ideas how to get it out?
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Re: Bleeder Valves

Post by Rambozo »

Apply some local heat to the boss where it is screwed in, then give it few sharp whacks on top with a hammer. Make sure your vise grips have sharp teeth and get a good bite. Use the smaller vise grips that can grip it in the curved portion of the jaws. Work it back and forth to get it going.


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