Muffler Tuning
12-09-2010, 07:06 PM
#1
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Superstock
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Join Date: Nov 2010
Location: St.Louis Mo
Posts: 317
Muffler Tuning
I just got a Hawk and it has D&D pipes on it so it is rather loud. I'm not totally against it being so loud but if I wanted to quiet it down some is there something I can do to the mufflers other than replacing them?
12-09-2010, 09:33 PM
#3
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MotoGP
Join Date: May 2008
Location: San Clemente, CA
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There have been many discussions on the Forum as to which slip-ons are loudest, sound best, look best, etc. And D&D is usually pointed out as being among the loudest, if not the loudest.
You should be able to find a used set of stockers (make sure they haven't had a bafflectomy) or maybe quieter slip-ons. Yoshimura's are considered about the quietest, with the street baffles installed. I've run mine mostly without the street baffles (loud), but occasionally I'll put them in to tone it down (a lot quieter).
Welcome, and enjoy the torque!
Oh, and the potato may cause a little too much backpressure.
You should be able to find a used set of stockers (make sure they haven't had a bafflectomy) or maybe quieter slip-ons. Yoshimura's are considered about the quietest, with the street baffles installed. I've run mine mostly without the street baffles (loud), but occasionally I'll put them in to tone it down (a lot quieter).
Welcome, and enjoy the torque!
Oh, and the potato may cause a little too much backpressure.
Last edited by VTRsurfer; 12-09-2010 at 09:37 PM.
12-09-2010, 10:32 PM
#4
2nd mouse gets the cheese
SuperBike
Join Date: Jan 2008
Location: Beaverton, OR
Posts: 1,697
its possible to make an additional baffle that piggybacks inside the aftermarket pipe. I have done something like a gun silencer type device on a different bike that was too loud and I would say it reduce the db's by 10-20%. With dimensions this would be something I could make for you if you so desire. It would visually be almost invisible too.
12-10-2010, 06:25 AM
#6
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SuperSport
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Location: Hamilton, Ontario, Canada
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My Leo's came with a perforated disc that could be inserted between the mid-pipe and the muffler. I had complained to a neighbour about how noisy his idiot friend's bike was so I wanted my bike to be as quiet as possible. The Leo's with baffles and perforated discs were as quiet as stock pipes.
You could measure the outside diameter of the mid-pipe, buy a couple of washers with the same outer diameter, install them between the muffler and mid-pipe and see if it helps make your bike quieter. If it's too quiet or performance suffers, you could make the hole in the washer bigger.
You could measure the outside diameter of the mid-pipe, buy a couple of washers with the same outer diameter, install them between the muffler and mid-pipe and see if it helps make your bike quieter. If it's too quiet or performance suffers, you could make the hole in the washer bigger.
12-10-2010, 07:49 AM
#7
2nd mouse gets the cheese
SuperBike
Join Date: Jan 2008
Location: Beaverton, OR
Posts: 1,697
The only problem with stock pipes is how much those suckers weigh though. FWI stock pipes with a bafflectemy are way quieter then d and d pipes. I have had my bike with stocker pipes (w/bflectomy) and a buddy's bike with d and d and I could hardly hear my bike running 
. I love loud though
. I love loud though
12-10-2010, 09:14 AM
#8
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Join Date: Apr 2005
Location: Montreal
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I just ordered a set of db killers from eBay:
http://cgi.ebay.com/DB-KILLER-BAFFLE...item230c42cf41
Police around here are starting to crack down on illegal pipes (and rumours are circulating that a new law would see demerit points being issued) so I am looking ahead.....
http://cgi.ebay.com/DB-KILLER-BAFFLE...item230c42cf41
Police around here are starting to crack down on illegal pipes (and rumours are circulating that a new law would see demerit points being issued) so I am looking ahead.....
12-10-2010, 09:31 AM
#9
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Join Date: May 2008
Location: San Clemente, CA
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I just ordered a set of db killers from eBay:
http://cgi.ebay.com/DB-KILLER-BAFFLE...item230c42cf41
http://cgi.ebay.com/DB-KILLER-BAFFLE...item230c42cf41
12-10-2010, 04:23 PM
#10
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Location: St.Louis Mo
Posts: 317
I finally got a break in the weather and was able to get her out for a long ride and I think I will keep them, I like em loud too although my neighbors may not appreciate it it when I'm heading to work at 5AM.
12-10-2010, 06:40 PM
#11
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Location: San Clemente, CA
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I don't know what to say about the neighbors, except warm it up fast and short shift when you go down your street. I put a full Muzzy system on my wife's EX500 (she now rides an SV650S), and when I would ride it to work to change the oil, I'd go through town with as little throttle as possible.
But our bikes sure sound nice with open exhaust.
But our bikes sure sound nice with open exhaust.
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