What clicks at 3000rpm?


Information and questions on GL1500 Goldwings (1988-2000)
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NJViking
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What clicks at 3000rpm?

Post by NJViking »



New-to-me 1999 GL1500SE. A loud hiss, or similar white noise coming from below the entertainment system. Is VERY obvious from the cockpit...almost as loud as the engine itself (not that the engine is "loud"). The noise doesn't change significantly with engine speed. BUT at exactly 3000rpm the hiss switches off with an obvious "click". The sound comes right back on below 3k. Not knowing anything, I envision a big vacuum leak, and a solenoid valve that is turning the leak on and off.

Before I start blindly disassembling my new baby, does anyone have an opinion on this?


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ct1500
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Re: What clicks at 3000rpm?

Post by ct1500 »

There is a hose under the right front of air box which is probably not attached. It draws in filtered air for the Pulse Air Injection into the exhaust stream and is used for the Shot Air and makes a loud gurgling sound.
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NJViking
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Re: What clicks at 3000rpm?

Post by NJViking »

If that's the case (and it does sound like you know of what you speak, my friend) then that's great news. Still some plastic to take off, but I can replace some burned out bulbs in the entertainment system while I have it off.

Cheers!
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Snowmoer
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Re: What clicks at 3000rpm?

Post by Snowmoer »

Here is a How To article on replacing the bulbs with LED bulbs so you can see what it involved in getting to them. I checked the parts fiche and did not see replacement bulbs for the radio.

viewtopic.php?f=14&t=10985&sid=397203a7 ... 2bc0535da0
NJViking
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Re: What clicks at 3000rpm?

Post by NJViking »

Thanks! Very nice of you to point me to this. My primary path will probably be to search for direct replacements for the incandescent bulbs, and I'd replace all of them at once. But if my search comes up short after an hour, I'll go the LED route. Either way, the writeup is valuable.
NJViking
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Re: What clicks at 3000rpm?

Post by NJViking »

Looks like the options are either retrofit with LEDs or wait at least 3 months for the factory parts. I'm going LED!
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Re: What clicks at 3000rpm?

Post by NJViking »

I got the airbox off, and I don't see a big PAIR hose, where I would expect it to be, to the front right. If I could figure out how to attach an image, I would.
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Re: What clicks at 3000rpm?

Post by WingAdmin »

NJViking wrote: Sun Dec 31, 2023 11:33 am I got the airbox off, and I don't see a big PAIR hose, where I would expect it to be, to the front right. If I could figure out how to attach an image, I would.
How to add pictures to your post
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ct1500
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Re: What clicks at 3000rpm?

Post by ct1500 »

In the bottom right of this photo is the PAIR intake hose with the spring clamp around it.
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NJViking
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Re: What clicks at 3000rpm?

Post by NJViking »

Thank you my friend, and Happy New Year.
Yes, that is exactly what I was expecting to see when I removed the airbox, but it ain't there. No sign. I peered down into the space with a flashlight, felt around with my fingers. It appears that, for whatever reason, the hose is missing.
So, now I have to access whatever the lower end attaches to...a solenoid valve? How do I get to it?
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Limpy45
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Re: What clicks at 3000rpm?

Post by Limpy45 »

you remove the right side fan and you can see where the hose goes and attaches. Someone had been into mine before I bought it and the clamp for the hose had come loose and slid all the way down to the valves mentioned earlier. Had some fun(?) getting it back up on the hose again. If the hose was about 1/2 inch longer from factory our lives would be so much easier.
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Re: What clicks at 3000rpm?

Post by NJViking »

Thanks CT and Limpy,
This will probably have to wait until February. I found a good write-up here, on removing all the plastic. Funny...I used to always say that the thing I love about wrenching on bikes vs, cars, is that bikes are > 90% mechanical, and that everything is accessible. :lol:

-Lars
NJViking
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Re: What clicks at 3000rpm?

Post by NJViking »

Hey fellow wingnuts. I finally got back on this, and I'm thrilled to find that the green-banded hose was there, not missing. It had dropped way down, out of sight from above. Now I'll re-install the airbox while I have the cooling fan out so I can control the hose from below.
Life is good... :D :D


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