How do you make a muffler muffle?

[Rich Sperry]

I just picked up the streetfighter exhaust and would like to not wake the dead when I come home from work at night. So the question is, how do you make a muffler muffle more.. I dare you to say that 3 times...lol I looked on the 2 Brothers site and didn't fine any mention of "Quiet Tips"... Any other suggestions?


Rich

No matter where you go, there you are!

[gi02sl]

The "Quiet Tips" are not listed on the site, you'll need to call them at 800-211-2767 to see if they'll work for your app. Also, I've heard of people using the Staintune baffles which will require drilling a small hole in the outlet pipe (a mod I'm looking at). Let me know what you find out.

[BikerGeek]

I used the Staintune nozzles on my Leo Vince high-mounts. They reduced the volume of sound quite a bit without making the bike sound wimpy like the stock exhausts. I had to wedge the Staintune into the Leo openings(not a perfect fit). The Staintune restrictors are slightly bigger than the Leo holes. I will post pictures as soon I can. The restrictors are held by a large metric set screw tapped through the Leo mouth. I can remove them in seconds.

My best aftermarket purchase of 2002!

Ride safe!

[falco ftr]

Why strangle it? Idle through town late at night and when leaving early for rides. Neighbors will get over it!
Hell, mine are just happy I'm nice enough to roll it out of the groundfloor garage before firing it!

[parkec]

My neighbor who wakes us up at 5:45. He every morning went on vaction.... Our lives were in shambles..It was Helll



You got the pipes, be proud, be loud.

[Silverfalco]

I had the same problem with the RSC cans. My main problem with the loudness was waiting for the bike to warm up so I could sneak out of the quiet neighborhood. I put them on one day and after one ride I took them off. They just were too dam loud. I searched around for the Staintune or Twobrothers baffle but no one could help me. I ended up machining my own by buying a length of 2" round stock and machining it down to fit snug into the tail piece. I bored a hole 1.062" in the center. Drilled and tapped the reducer and used one bolt to hold it in place like the Staintunes. Results are great, much, much quieter and loud enough to show off the carbon cans. And the reducers can be taken out for track days!

If you are interested email me for pictures. I might be willing to make a few more.:lol:

Mike, 2002 Silverfalco

[dave333]

Please don't forget the less-than-famous trick of removing half of the muffler packing. I quieted my Renegades quite a bit by opening them up, unwrapping the packing and then laying the packing out on the floor. I cut the length of packing in half and then loosely re-wrapped the center core. Re-assemble the can and your at-idle noise level is down considerably. High end still sounds like a freight train...

Give it a try and tell me I'm wrong! Experiment with different densities to get different noise levels.

[gi02sl]

In continuing my own search, I discovered through CBT Imports (handles Staintune) that they sell two baffle sizes, for 48.5mm and 54mm outlet pipe (verify before ordering). If one of those fits, great, or the larger could be machined down. I have Renegades and found that they are now making their own sound reducers so that's the way I'll go.

[kcroberto]

An interesting note from Staintune regarding the sound
restrictors and fiberglass packing and carbon fiber:

www.cbtimports.com/staint...tsfaq5.htm (http://www.cbtimports.com/staintuneproductsfaq5.htm)

[silver02guy]

I absolutely loved my Akro's when first installed, but they were just a bit obnoxious for my taste... so in went these dB Eaters... The outlet is reduced from 48mm to 32 mm. Plenty of rumble, but a bit tamer than just the pipes. They are held in with a removable Loctite flange sealer, so whenever I change my mind, heat up the outlet with a heat gun, a little tapping, and out they come. For me, they're perfect.

<img src="http://members.cox.net/e.shauver/images/eliminator1.jpg"/>

-Erik

[wlk303]

kcroberto,
Are you suggesting that restrictors should not be used with carbon fiber mufflers? Just wondering as I have carbons and am considering some kind of restrictor.

[silver02guy]

You will need to make sure you aren't burning your carbon. I periodically check the carbon portions after rides with a heat gun, but nothing extreme yet. Some baffles or end reducers may cuase heat buildup more than others, so temp the can before and after you install and decide if the temps seem reasonable. If you experience a large heat increase over no reducers, you may want to reconsider them. But I suppose we do run the risk of torching the carbon fiber...

-Erik

[kcroberto]

silver02guy - whose restrictor are you using? How long have
you used them?

wlk303 - That was just info I came across while searching
since I would like to somewhat quiet my Akro's also.

[silver02guy]

www.mapbydyka.de/goto.htm (http://www.mapbydyka.de/goto.htm)

www.mapbydyka.de/aprilia_..._mille.htm (http://www.mapbydyka.de/aprilia_shop_2003/index.html?http://www.mapbydyka.de/aprilia_shop_2003/auspuffanlagen_aprilia/auspuffanlagen_aprilia_akrapovic/auspuffanlagen_akrapovic_rsv_mille.htm)

The dB eaters were ordered from this dealer in Germany. They are MAP by Dyka. They can deal in English via email and were very quick to repsond to questions. However, they dB eaters are intended for the titanium exhasut and I assumed the risk of damaging my cans.

I have had them installed for about 2000 miles with no problems.

Note: the parts require a bit of hand fitting to get them in... they are a tight fit. Also, the instructions are in German... They cna be installed in two ways... with a cap head screw if only for track days, or by using a gasket eliminator to hold them in (Loctite 510 is recommended by them). I am using the 510 with no problem.

Here is a picture of the part:

<img src="http://members.cox.net/e.shauver/images/eaters.jpg"/>

A picture of them installed:

<img src="http://members.cox.net/e.shauver/images/installed.jpg"/>

Hope this helps,
Erik

[silver02guy]

I got to here a Haga rep Mille R yesterday at the dealer... it is quiet in comparison to the Falco with the Akro's... (even with the dB eaters) hmmm more research needed.

[kcroberto]

silver02guy,

How in the H3LL you came up with this one is interesting
at least. Ich sprechen brichen deutch (can't spell it either),
but with 2k miles I will probably contact them. Thanks!
My neighbors say thanks too...

-kcroberto

[parkec]

again.


Whats the prblem?


Ive got the RCS Cans on by beatiful Red and Dark 02 and love them... Love the Bike.

[Rich Sperry]

I just don't want to piss off my neighbors, or set off car alarms.

[silver02guy]

No problem...except that the pipes don't have a volume knob!!! :p

As for my neighbors, they fire up the Hardleys all the time with dragpipes... their preference. I just couldn't stand the ringing ears after rides (CA doesn't allow ear plugs). I wanted somewhere between stock lawnmower sounding cans and the "helicopter flyover" sounding idle of fully open pipes. Totally open, they sound beautiful, but it got old fast. Not to mention I couldn't hear the air intake anymore (which I like even better than the exhasut sound).

Sound Level=Personal Preference8o

(Although my riding buddies give me hell becuase they liked the louder sound:) )

[billyjazz]

mike,

Am replying to this very old post of yours. Can you send me photos and possibly advise with a bit more detail on how to make the mufflers. Alternatively I am willing to pay for some if you are still willing to make some more.

regards,
Cameron


I had the same problem with the RSC cans. My main problem with the loudness was waiting for the bike to warm up so I could sneak out of the quiet neighborhood. I put them on one day and after one ride I took them off. They just were too dam loud. I searched around for the Staintune or Twobrothers baffle but no one could help me. I ended up machining my own by buying a length of 2" round stock and machining it down to fit snug into the tail piece. I bored a hole 1.062" in the center. Drilled and tapped the reducer and used one bolt to hold it in place like the Staintunes. Results are great, much, much quieter and loud enough to show off the carbon cans. And the reducers can be taken out for track days!

If you are interested email me for pictures. I might be willing to make a few more.:lol:

Mike, 2002 Silverfalco

[CarlosT]

Loud Pipes Save Lives :d

[CarlosT]

The key to quiet cans is volume...that's why the Akras sound mellower than the RSCs and also why that 1/2 packing trick sorta works. I recommend that you fit two of those hideous stock Mille dual outlet cans...that should quite things down :D

[JoeJoe]

Rich,
Don't listen to them dudes. It is a matter of personal preference and the local neighborhood. I have exactly the same problem. I had my local shop pull the rivets and weld a baffel in as we are jet hotting the connector pipes anyway. Should get the bike back together in a couple weeks and will see how it goes.