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General Category >> Rubber Side Down! >> Annoying rattle inside exhaust header / muffler
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Message started by rokrover on 11/25/09 at 11:44:26

Title: Annoying rattle inside exhaust header / muffler
Post by rokrover on 11/25/09 at 11:44:26

So I put the stock muffler back on as the SuperTrapp was just too noisy for the neighborhood and now there's an annoying rattle / buzz inside either the header pipe or stock muffler. Sounds like a loose baffle maybe. I checked there's no metal-to-metal contact against the frame or heat shield outside. Any similar experiences or ideas? Maybe all those backfires just blew the double-wall loose inside the header :-/

Title: Re: Annoying rattle inside exhaust header / muffle
Post by justin_o_guy2 on 11/25/09 at 11:48:00

I can roll my Supertrapp past a hospital with 14 baffles installed. Its the throttle that makes it loud. Or maybe too many baffles? Man, Id rather take a coffee can & stuff it with steel wool & hang it on my Trapp coming & going that ditch the Trapp. Take it off when you get away & put it back on coming in, if youre that nice of a neighbor. Also, watch the gas, just roll along nice & easy, its not that loud. Maybe that will solve the rattle, too!

Title: Re: Annoying rattle inside exhaust header / muffle
Post by verslagen1 on 11/25/09 at 14:15:02

Did you try the fiberglass in the supertrapp?
I haven't cause I'm happy with just disks.
in my neighborhood, HD's roll by trying to keep their wake the dead bikes down to a roar.

Title: Re: Annoying rattle inside exhaust header / muffle
Post by dasch on 11/26/09 at 01:34:04

Mine does the same thing. Weird rattle for which at first I though it was loose timing chain. But it stops rattling when I press the exhaust pipe with my foot. Burns through the shoe, but stops the rattle :D

Title: Re: Annoying rattle inside exhaust header / muffle
Post by rokrover on 11/27/09 at 10:18:54

OK, problem solve-ed, as Inspector Clouseau would say. I couldn't stand the annoying rattle that resonated at certain rpm's so tore the OEM muffler off again. Turns out my wild hunch the exhaust header inner tube was loose proved correct. How, you say? The inner tube is located at the muffler end by a split sleeve spacer. When I first installed the SuperTrapp I had to cut 3/4 inches off the spacer through a spot weld to slide it up far enough so the mounting bolt holes lined up. Now back to the OEM muffler and the shortened spacer vibrated loose causing all the rattle. Just have to cut back to 6 discs in the Trapp to keep the neighbors calm.

Title: Re: Annoying rattle inside exhaust header / muffle
Post by justin_o_guy2 on 11/27/09 at 12:30:36

Just have to cut back to 6 discs in the Trapp to keep the neighbors calm.

Bummer.. If you rejetted for the TRapp, youll need to go back to smaller jets,