After market muffler for a SR500

Is a SR500 always going to be a noisy mofo, as I've just got a second
exhaust muffler for it but It's still just as loud.

This new muffle is a inverted megaphone style with a screw in end, but is
just as loud as the shot gun style muffler I had before (different note, but
still as loud). The bike has an after market header pipe.

Can I maybe repack it to lower the noise or do I aim for a longer/bigger
muffler or just accept the fact that a SR500 is a noisy mofo?

 

try rapping the baffle in 10$ worth or chop type fiberglass mat . must
be rough not the fine stuff
worked very well with the yammy 500

 

In aus.motorcycles on Sun, 20 Jul 2003 21:23:16 +0800

Doesn't have to be noisy, muffler design and packing makes a diffeence.

Most off the shelf aftermarket stuff is noisy, it's what the punters
want. My bbig alloy can on the XT Yam is loud but not irritatingly so,
the note is very mellow, no bark. But there's bugger all muffling in
there.

The cans on the Guzzi are loud now because the packing's died, but were
quiet when got.

You can try taking it to a car place that does custom exhaust work, see
what they say about packing it. If you are in Bris you can try Forans,
bastard moved up there last year just before my muffler packing died...


Zebee

 

The rice-boy can I just put on the XLV was just a wee bit LOUD,
so I drilled the rivets out and had a look, it's basically just
a holey pipe the same diameter as the header up the middle of a
stainless can, and fibreglass packing around the outside of
the holey pipe. Pretty typical construction for a 'sports' muffler.

I've repacked it with more fibreglass, which solved the ears-bleeding
problem, and added another bit of holey steel blocking the end to
prevent small furry animals climbing in there. But what made the
big difference to the sound was adding a loose wad of small chicken
wire down the length of the middle pipe, which removed the 'crack' of
the exhaust note almost entirely.

-----sharks (lo-fi)

 

Get some stainless steel wool from your supermarket. Comes in coarse grade
(shiny round pads) and stuff that looks like ordinary steel wool - you'll
need to soak the soap out of the latter (unless you want to smell like a
killing line)..

Pack muffer with whatever mix gives you the desired note. I've got the
coarse stuff in my GS megaphone. Lasts forever and doesn't trap condensation
as much as fibreglass on short runs.

cheers
DC - GS850G