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General Category >> Rubber Side Down! >> Wierd exhaust sound has developed.
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Message started by Howdy on 07/16/10 at 13:11:29

Title: Wierd exhaust sound has developed.
Post by Howdy on 07/16/10 at 13:11:29

Wierd sound from exhaust.Under everything but idle the bike now makes like a sewing machine sound almost like a pressure leak in the exhaust.Not a poping or backfire but more high pitch whistle after each exaust cycle?Any ideas ?

Title: Re: Wierd exhaust sound has developed.
Post by Phelonius on 07/20/10 at 09:57:23

The fart chamber at the bottom of the muffler has developed a crack, probably along one of the welds that hold the mount.

Phelonius

Title: Re: Wierd exhaust sound has developed.
Post by racerwill on 07/29/10 at 19:30:20

sounds like maybe the baffle has come apart a little bit and is restricting the exhaust flow especially near the end of the pipe.....when you open the throttle, exhaust volume increases dramaticly and a restriction will cause a little leak up stream to produce this noise.....block the tailpipe while it's running, you will hear the same noise

Ww

Title: Re: Wierd exhaust sound has developed.
Post by verslagen1 on 07/29/10 at 20:06:06

What year? (as reference)

probably like phel said, you got rust or crack.

either fix it or releave it.

drill six holes in the end for louder sound.