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Message started by Kirk on 05/08/08 at 06:57:38

Title: Riding w/out a muffler
Post by Kirk on 05/08/08 at 06:57:38

Hey fellower LS riders I have a question. I have an 06 S40 and was thinking of simply removing the muffler and running it with the straight pipe. Will that be to loud? Will it affect the performance and milage of the bike? This is my first bike so I dont want to mess her up but I want her to growl a bit louder if possible without me growling from shelling out alot for a new muffler.  :) Any suggestions or advice to this post are greatly appriciated. By the way I love this forum this the best on the net!

Title: Re: Riding w/out a muffler
Post by Toymaker on 05/08/08 at 08:38:13

I think it WILL BE too loud.  Also, you will have to re-tune the carb for that.  Just do what I did.  I got a slip-on (cost about 50 bucks) and not only do I get more power, but i have a bike that has a good sound. :) :)

Title: Re: Riding w/out a muffler
Post by rpgpgmr on 05/08/08 at 09:56:12

I'll second that.  There's a nice screamin' eagle style muffler for sale on ebay for $49.99.  I bought and it sounds great.  Your neighbors will be calling the police every time you start it up if you take that muffler off.  ;D

Title: Re: Riding w/out a muffler
Post by gj859 on 05/08/08 at 09:59:01

I started mine briefly, very briefly, without a muffler. It may have been the loudest engine I have ever heard.

Title: Re: Riding w/out a muffler
Post by T Mack 1 on 05/08/08 at 10:17:18

Yes.... it would be very loud.  And at WOT..."get arrested going by hospitals" loud.

For the price, a Harley take-off is the way to go.

Two ways to get a HD take-off,  
1) walk into a HD dealer parts dept, and ask if they have any "Dyna Super Glide" , "Dyna Wide Glide" or "Sportster 1200" take-off's.  Tell them it can't be the catalyst type.  They will ask you what model & year Hog you have.... just tell them it's for a project... they should be happy with that.  
2)  ebay , Search "dyna muffler" or "Sportster muffler".  

Title: Re: Riding w/out a muffler
Post by punkid33 on 05/08/08 at 10:26:13

Kirk,
I too have been experimenting without a muffler.  I started the bike for about 4 seconds (in my garage) and the place was shaking.  Pretty Bad Ass.  I was looking to put on a custom straight pipe and I was researching some ways to tone it down and also keep some torque.

1) To tone it down you add a slip on baffle to the inside of the end of the pipe.  JC whitney has these for cheap.

2) You can creat a "lollipop"
Basically its a Thumb Screw, a screw with an upright metal piece so you can screw it in with your hand. (looks like a lollipop).
If you screw that into about 4 inches from the end of the straight pipe you can get different sounds and response dependant upon the angle of the head inside the pipe.  If the head is perpendicular to the pipe you will get more torque but less sound.  If it is parallel to the pipe you get the most sound but no torque.

You can also try adding a Torque cone.  They go inside the exhaust at the spot it meets the engine.  It reduces the initial size of the exhaust pipe to create some back pressure.

The more open your pipes the bigger pins when you rejet.

Title: Re: Riding w/out a muffler
Post by Keith_T on 05/08/08 at 10:42:44


51284864666E34050 wrote:
Two ways to get a HD take-off,  
1) walk into a HD dealer parts dept, and ask if they have any "Dyna Super Glide" , "Dyna Wide Glide" or "Sportster 1200" take-off's.  Tell them it can't be the catalyst type.  They will ask you what model & year Hog you have.... just tell them it's for a project... they should be happy with that.  
2)  ebay , Search "dyna muffler" or "Sportster muffler".  


You left out the option to go to a biker bar late at night and pick one out.   :)

Title: Re: Riding w/out a muffler
Post by verslagen1 on 05/08/08 at 10:50:06


6B65697468657274000 wrote:
You left out the option to go to a biker bar late at night and pick one out.   :)

If there's not one laying in front of the bar, go up and down the street abit.  Look for big shiney bling.

Title: Re: Riding w/out a muffler
Post by Kirk on 05/08/08 at 11:36:18

Thanks everyone for the input I will go check out my local Harley Dealer here in Atlanta and also price a slip on through e-bay. $50 sounds a lot cheaper than a noise ordinance ticket from the local fuzz..hahaha Thanks again all

Title: Re: Riding w/out a muffler
Post by Toymaker on 05/10/08 at 04:53:17

Noise ordinance....what's that???  Here in NC, we don't have those...just need some kind of muffler.


"Hey officer...see that 10 inch piece of pipe......that's my muffler." :)

Title: Re: Riding w/out a muffler
Post by Starlifter on 05/10/08 at 05:36:26

Quiet pipes save gripes.

Title: Re: Riding w/out a muffler
Post by eanon on 05/14/08 at 09:09:39

yeah, but loud pipes save lives!

Title: Re: Riding w/out a muffler
Post by buttgoat1 on 05/14/08 at 09:19:53

Hey Eanon, that turnout still turnin it for ya?
I blued the crap outta mine, but thats ok, Bettie looks like she is ridden hard and put away wet.

Title: Re: Riding w/out a muffler
Post by MAYES on 05/14/08 at 16:08:16

My bike has a straight pipe with a fishtail end on it.It is a little too loud,and my head pipe is bluing very badly.I get plenty of dirty looks when riding mine around town. ;D

Title: Re: Riding w/out a muffler
Post by rigidchop on 05/14/08 at 17:08:43

got any pics?

Title: Re: Riding w/out a muffler
Post by mick on 05/14/08 at 23:46:01

You could always try a "Jardene" muffler it fits right on the bike and everything lines up perfectly,I have one for sale in our market place for $120 complete with a jet and needle set,make me an offer ,the one I have is almost new it is a slash cut,and looks great.

Title: Re: Riding w/out a muffler
Post by toro on 05/16/08 at 21:36:36

If you go with one of the Harley pipes, should you re-jet it as well?

Title: Re: Riding w/out a muffler
Post by verslagen1 on 05/16/08 at 21:45:58

If you change the intake or exhaust you need to adjust the bike to suit.

Title: Re: Riding w/out a muffler
Post by LANCER on 05/17/08 at 10:31:58

You really do not want to run with just the header.  It will be eardrum damaging loud and the bike will run like  s _ _ t.... you get the idea.  The power curve will be in the trash can and the carb is virtually guaranteed to not tune for you.
There are all sorts of exhaust pipes for the V-twins that are pretty much just header pipes, and you can be sure that they are running at about 65% of their potential.  The exception would be a pro drag bike.

A stock or even modified street engine NEEDS a muffler to fun properly.
The very least would be something like the Hard Krome drag pipe style mufflers.

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