Very annoying "resonance" at 65-75


Information and questions on GL1500 Goldwings (1988-2000)
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NevadaDave
Posts: 5
Joined: Tue Sep 15, 2009 11:48 pm
Location: Carson City, NV
Motorcycle: 1999 GL1500SE

Very annoying "resonance" at 65-75

Postby NevadaDave » Fri May 01, 2015 1:50 pm



I have a '99 SE, and at around 3000-3500 RPM, there is some kind of weird resonance in either the exhaust or intake that makes a buzzing/roaring sound in my ears. If I'm going 65, this sound is incredibly loud. If I downshift to 4th, bringing the RPM up, I can barely hear the engine, but I also like reasonable fuel economy! I've tried two different mufflers with no real noticeable change, so I'm thinking maybe it is intake-related, but before I start tearing things apart, I'm wondering if anyone else has had this issue? Wearing earplugs helps, but the "resonance" can still be heard. The only other possibility that comes to mind is that there is something about the shape of my helmet that causes this, but I don't have another one to try.
I am open to suggestions!



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spiralout
Posts: 1049
Joined: Sun Feb 17, 2013 6:41 pm
Location: Alabama
Motorcycle: 1975 GL1000 (gone)
1980 GL1100I (with '77 1000 engine)
1996 GL1500 SE

Re: Very annoying "resonance" at 65-75

Postby spiralout » Fri May 01, 2015 9:05 pm

Do your exhaust tips turn downward by any chance? I've read that the type of tips you use can cause this exact problem.

NevadaDave
Posts: 5
Joined: Tue Sep 15, 2009 11:48 pm
Location: Carson City, NV
Motorcycle: 1999 GL1500SE

Re: Very annoying "resonance" at 65-75

Postby NevadaDave » Fri May 01, 2015 10:46 pm

No, they point straight back. I did a bit of fiddling today, and found that the irritating "ringing" noisae was less when I pulled my helmet away from my ears, so maybe there is something in the helmet itself that is the cause of the annoying sound. I'm going to see if I can try other helmets and see if it makes a difference.

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RBGERSON
Posts: 2619
Joined: Tue Mar 09, 2010 7:57 am
Location: SCOTTSDALE, AZ
Motorcycle: 98 SE GL 1500
had every year from 75 to 83

Re: Very annoying "resonance" at 65-75

Postby RBGERSON » Sat May 02, 2015 8:15 am

If it was the helmet changing to 4th and raising the rpm's doesn't seem like it would effect the helmet noise if speed remained the same????
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

NevadaDave
Posts: 5
Joined: Tue Sep 15, 2009 11:48 pm
Location: Carson City, NV
Motorcycle: 1999 GL1500SE

Re: Very annoying "resonance" at 65-75

Postby NevadaDave » Mon May 04, 2015 2:54 pm

The odd "noise" I hear does seem to be RPM-related, in that certain RPM's are worse than others. However, as I observed more closely this weekend, I hear the distortion/fuzz with almost everything. It is as if a guitar fuzz pedal was inserted in my ear canal. I have to think that there is some other auditory phenomenon happening here, as if I pull my helmet away from my ear a bit, this distortion seems to diminish substantially. More research is indicated...

rpmcneal1
Posts: 5
Joined: Mon Jun 02, 2014 2:23 pm
Location: Weirton, WV
Motorcycle: 1999 GL1500SE

Re: Very annoying "resonance" at 65-75

Postby rpmcneal1 » Thu May 07, 2015 10:34 am

I used to get something like that on my 1200. Finally found that it was deer whistles mounted on the fairing. When the wind caught them just right/humidity/who knows, it was a random occurrence but would continue until you slowed to about 35 mph.

NevadaDave
Posts: 5
Joined: Tue Sep 15, 2009 11:48 pm
Location: Carson City, NV
Motorcycle: 1999 GL1500SE

Re: Very annoying "resonance" at 65-75

Postby NevadaDave » Thu May 07, 2015 12:04 pm

Well... I don't have any deer whistles, but I did find out something interesting a couple of days ago. I used a different brand of soft earplugs, and had no "fuzziness" or distortion from either the engine or the earphones. This leads me to believe that the other earplugs had some characteristic that caused this audible distortion. Very strange, indeed, but I'll use the other type (Hearos was the brand) from now on.




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