Squeak coming through the exhaust. I’m at a loss

[Twistedspoke100]

Hope this link works. Can anyone offer any advice on what this squeak is? I changed out the big radius pipes , they were squeaking the same way, hoping that was the fix. It’s driving me nuts.

Big Dog Chopper | HELP ! I replaced the exhaust today for 2 reasons first for the performance benefit of a 2 into 1 pipe and second the Vance and Hines big radius pipes... | Facebook

HELP ! I replaced the exhaust today for 2 reasons first for the performance benefit of a 2 into 1 pipe and second the Vance and Hines big radius pipes squeaked every time I started it. Well guess...

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[Jersey Big Mike]

I hear strange sounds don't know that I say squeak, but my suggestion would be get a mechanics stethoscope and check the engine, oil pump etc.

https://www.northerntool.com/shop/tools/product_200023874_200023874?utm_source=bing_PPC&utm_medium=AutoRepair&utm_campaign=Specialty%20Tools&utm_content=mechanics%20stethoscope&cmpid=361122948&agid=1183075373072042&tgtid=kwd-73942321568072:loc-4123&msclkid=6f8449418bc71801c89e29b1f9b95828

 

[mleach72]

Normally, I would say loose baffle or heat shield clamp, but that would be quite a coincidence for both exhausts have the same problem. Check that the heat shields aren't rubbing the heads somewhere. Chirps and squeaks can be hard to pinpoint sometimes. They sound like they are coming from a certain part, but they are coming from somewhere else. These bikes are notorious for the top motor mount bolt coming loose.

 

[Twistedspoke100]

I hear strange sounds don't know that I say squeak, but my suggestion would be get a mechanics stethoscope and check the engine, oil pump etc.

https://www.northerntool.com/shop/tools/product_200023874_200023874?utm_source=bing_PPC&utm_medium=AutoRepair&utm_campaign=Specialty%20Tools&utm_content=mechanics%20stethoscope&cmpid=361122948&agid=1183075373072042&tgtid=kwd-73942321568072:loc-4123&msclkid=6f8449418bc71801c89e29b1f9b95828

Yep tried that my ears are still ringing. Everything on this bike is loud lol. Couldn’t pin point.

 

[mleach72]

Now that I think about it, definitely check your top motor mount bolt and coil cover head bolts. If they are loose, the motor will flex more and may cause the exhaust to squeak.

 

[Sven]

With a paper towel wipe down the mounting hardware. The etching will rust around the rub side so once the towel hits the red rust most likely that area is loose. So what you can't see is that towel behind the scenes.

 

[HMAN]

You said you swapped pipes with same issue. Possible loose exhaust stud/studs?

 

[Twistedspoke100]

Well it’s definitely in the engine. I put the old pipes back on, squeak is still there but it’s quieter that’s because the the old pipes have baffles and the new one is no baffle. Any thoughts on what the squeak is? What’s inside that would squeak? PS I disconnected the plug wires and turned over no squeak. But if it’s running and I pull one plug wire at a time nothing changes the squeak stays the same

 

[41bigdawg]

Have you tightened the top motor mount and the coil cover bolts yet? Those need to be checked regularly or it will squeek !!

 

[Twistedspoke100]

Have you tightened the top motor mount and the coil cover bolts yet? Those need to be checked regularly or it will squeek !!

Yes they are tight

 

[Jersey Big Mike]

Does pulling the clutch in change the sound?
Does it change/stop at different rpms?

You could use the stethoscope and your phone and record the audio on the phone so you can play it back without excessive volume (your complaint)
Could also transfer to PC and use an EQ to tune out other noises. Record where each sample (audio) is taken and see if that lets you isolate it any closer.

 

[Sven]

Short of it stalling out, use a bigass rag so you don't burn your hand closing the exhaust end(s). Maybe that closing off might quite out the muffler, and here is where I'm thinking the squeak is at the tail end? Supersonic whistling? You threw the exhaust back on so everything is tight and that's out of the scenario but the exhaust note?

 

[Twistedspoke100]

Does pulling the clutch in change the sound?
Does it change/stop at different rpms?

You could use the stethoscope and your phone and record the audio on the phone so you can play it back without excessive volume (your complaint)
Could also transfer to PC and use an EQ to tune out other noises. Record where each sample (audio) is taken and see if that lets you isolate it any closer.

Thats a great idea! I will give it a try.

 

[Twistedspoke100]

Short of it stalling out, use a bigass rag so you don't burn your hand closing the exhaust end(s). Maybe that closing off might quite out the muffler, and here is where I'm thinking the squeak is at the tail end? Supersonic whistling? You threw the exhaust back on so everything is tight and that's out of the scenario but the exhaust note?

It does get quieter with a rag, but now what? what is a super sonic whistle? is there such a thing and what's the fix?

 

[HMAN]

It does get quieter with a rag, but now what? what is a super sonic whistle? is there such a thing and what's the fix?

Can you hear it when you ride?

 

[knothead]

Which side of the motor is it coming from????....could be a bearing somewhere....could be as jersey mike said clutch bearing possibly....could be a primary chain...several things could be doing it

 

[Sven]

It does get quieter with a rag, but now what? what is a super sonic whistle? is there such a thing and what's the fix?

Let me get this straight... so as it runs without the rag, you get this sharp noise. In other words, you narrowed the problem down to being the exhaust exit as the squeak. And we'll assume this is it and now how to fix it.

You then kind of reflect the exit out or disrupt the sonic. I'd do something like this with another nut on the other side. This way you 'trombone' the ring at the very bottom, to center, or hitting the other side at it's full length inside the pipe. Yeah, like tuning out the sonic wave's flow.

https://external-content.duckduckgo.com/iu/?u=http%3A%2F%2Fwww.prolinemax.com%2Fassets%2Fimages%2F12-4-Turned-Eye-Bolt-2.jpg&f=1&nofb=1

Of course you hide the drill hole at the bottom. So the test would be to have that ring touching the end of the exhaust before you drill, and by the trombone extension, move it up or down until you hear it go away. I was thinking 8 or 9" in from the end. Hey, if it works right a the tip, I'd drill there.

 

[Twistedspoke100]

Can you hear it when you ride?

No low rpm only. Sitting still or parking lot speed

 

[Twistedspoke100]

Which side of the motor is it coming from????....could be a bearing somewhere....could be as jersey mike said clutch bearing possibly....could be a primary chain...several things could be doing it

Coming from the right side by the exhaust output

 

[HMAN]

No low rpm only. Sitting still or parking lot speed

Simple solution......ride faster. IF you hear it while riding faster, rotate the right handgrip until it disappears.