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high pitch ring sound (Read 121 times)
scrappy
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high pitch ring sound
04/17/10 at 11:06:26
 
does or has anyone had a high pitch ringing sound come from the exhaust when at idle and at throttle on a s40 which sounds like im riding a mopad. hopefully someone can help with this
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dasch
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Re: high pitch ring sound
Reply #1 - 04/17/10 at 13:08:03
 
I do. And in my case it stops if I apply pressure on the exhaust. Have no clue what it is.
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Re: high pitch ring sound
Reply #2 - 04/17/10 at 21:30:51
 
The normal sound of the stock exhaust could be described as a "high pitched ringing sound."  It's sort of a wheeze, or a whistle.  It could be that you are hearing exactly what the factory wanted you to.  Silly factory.  

There are several options available to make the bike sound better.
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Re: high pitch ring sound
Reply #3 - 04/17/10 at 22:17:41
 
dasch wrote on 04/17/10 at 13:08:03:
in my case it stops if I apply pressure on the exhaust.

if it stops when you apply pressure,... it's definitely an exhaust leak... tighten bolts...
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dasch
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Re: high pitch ring sound
Reply #4 - 04/17/10 at 23:33:33
 
Mine is not stock, it's a HD Dyna takeoff. I checked bolts, and they are tight. And it's not whistle, it's a metal ping ping ping sound, kinda like loose timing chain, but it's coming from the exhaust downpipe. It comes and goes, I assume the inner pipe somehow got disconnected from the joint below where the slipon goes, and rattles against the outer chromed pipe. Does that make any sense?  Undecided
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Re: high pitch ring sound
Reply #5 - 04/18/10 at 10:30:50
 
from your earlier description I assumed it was either the inner wall of the header pinging on the outer, or a piece of muffler baffle pinging on the shell.  

IMO merely annoying noises are best ignored,

but you could try changing the tension in the system by loosing the header and muffler mount and joint, and rotating the assembly the little bit possible, and snug it down again.  Everything changes when hot so it could go either way.
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dasch
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Re: high pitch ring sound
Reply #6 - 04/18/10 at 10:56:25
 
Don't have a baffle either  Wink  I ignore it, but sometimes it get really loud and clunky... and then it stops. I am dissasembling the bike these days, I might loosen and readjust.
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