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Buell Motorcycle Forum » XBoard » Buell XBoard Archives » Archive through October 28, 2008 » Gutting the stock exhaust, and what will it sound like? « Previous Next »

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Juniorkirk
Posted on Saturday, October 18, 2008 - 12:57 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I've looked for over an hour trying to find an old thread about gutting the stock exhaust on a 12R, but for the life of me i cant find it. I was just wondering about how loud a gutted stock exhaust is, and how would you go about doing the actually removing of the inner chambers of the exhaust. Any help would be great, otherwise i'll be going in blind on this tomorrow when i start ripping her apart
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Bombardier
Posted on Saturday, October 18, 2008 - 02:39 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Youtube has one.
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Werewulf
Posted on Saturday, October 18, 2008 - 09:30 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

the old harley cliche, "if its too loud, then you are too old"!...
that confirms it, im too old..
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Iamarchangel
Posted on Saturday, October 18, 2008 - 10:25 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

You might be thinking about the thread on Buelletinboard.

http://www.buelletinboard.com/forums/showthread.ph p?t=7052
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Juniorkirk
Posted on Saturday, October 18, 2008 - 07:41 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

HOLY SHIT!!!
I just got done gutting the pipe and putting it back together and went for a little ride. I'm in love all over again with my bike. I was born and raised around Harley's and now that my bike sounds like one, I stick out even more. i bet some people on base here would say it's loud, but screw them, loud is good.
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Ochoa0042
Posted on Saturday, October 18, 2008 - 08:16 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

that was quick, was it really that easy to do?

(Message edited by ochoa0042 on October 18, 2008)
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Johnnylunchbox
Posted on Saturday, October 18, 2008 - 08:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

It might sound like this
http://tinyurl.com/67hqzb
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Juniorkirk
Posted on Saturday, October 18, 2008 - 10:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

it was that easy, all you need is a wheel cutter, hammer, and a welder. i started at 9am intending on changing the spark plugs and gut the exhaust, and i was done with everything and on the road by 2pm. i was tickled at how smoothly and how easy everything actually was
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Mr2shim
Posted on Saturday, October 18, 2008 - 10:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

My muffler is gutted. I love it.
http://www.youtube.com/watch?v=Mk5ESY7_7TU
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Bombardier
Posted on Sunday, October 19, 2008 - 02:47 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

How is the midrange now?

Did you lose any power?
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Juniorkirk
Posted on Sunday, October 19, 2008 - 12:56 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I havent noticed any performance increase yet, but today im gonna be taking a nice speed ride down to San Diego, so i'll be able to see if there is any difference in performance
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Xl_cheese
Posted on Sunday, October 19, 2008 - 01:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

You're going to loose performance.
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Bartimus
Posted on Sunday, October 19, 2008 - 06:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

do you have any decel popping?
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Juniorkirk
Posted on Sunday, October 19, 2008 - 06:56 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

a TON of popping, but i LOVE it. and cheese was right, i was going about 70 and dropped it down to 4th and gunned it, and it felt gutless. Oh well, at least it sounds good, and i dont plan on using it to race, so i'm happy with it
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Bombardier
Posted on Monday, October 20, 2008 - 02:01 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

To make it noisy but still have the midrange go for a Spec OPS pipe.

They keep the interactive valve but have a good noise as well.
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Mr2shim
Posted on Monday, October 20, 2008 - 10:00 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

If you're just gutting a 12 exhaust I'd say you'd loose some performance. With a 9.. I'd think you'd gain something somewhere.

(Message edited by mr2shim on October 20, 2008)
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Guell
Posted on Monday, October 20, 2008 - 07:51 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I would think you would lose even more on a 9. I could be wrong though
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Rkutzner
Posted on Tuesday, October 21, 2008 - 08:54 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Gain on a 9 and lose on a 12?

HUH ? I'm curious as to your theory there......; )
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Bombardier
Posted on Tuesday, October 21, 2008 - 09:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

There is a paper on it somewhere about exhaust back-pressure being linked to cylinder filling and torque.

Not sure what the numbers are but if you look on the American Sport Bike website they have the exhaust shootout available to download.

The dyno runs show the 'hole' in the midrange torque of most of the aftermarket exhausts compared to the factory standard pipe with the interactive valve.

This valve routes the exhaust flow through a longer section of pipe which maintains the mid range torque.

The ones without seem to struggle as they are more free flowing and concentrate on horsepower as opposed to torque in this area.
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Nuerburgringer
Posted on Wednesday, October 22, 2008 - 01:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Loud isn't necessarily good; lots more development required to get quality performance. Shortcuts'll cost. If "loud" is one's only goal, then big whoopie. I personally think the guy's buddies on the base are right about the racket; proves nothing but obstinance. One more bozo getting a cheap thrill at the expense of motorcycledom in general. When California finally starts enforcing the decibel limit, guess who we get to blame? Flame away...

Disclaimer: My bikes have Drummers installed, albeit the quietest versions. Yes, louder than OEM, but I ride responsibly on the street, and save big noise for the track. Do not piss off the general population; we desperately need their support. ALL motorcyclists will pay dearly for the "screw them" attitudes of the few. And when that happens, NOBODY will have the option of rumbly aftermarket exhausts, ever again. Food for thought.
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Bombardier
Posted on Wednesday, October 22, 2008 - 05:49 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

The "No Aftermarket" push has already started in Australia by the Police and Transport Departments.

If your exhaust does not have the OEM stamp/sticker on it or it does not pass the specified DB test on stamped on the pipe then they issue you with a fine and an inspection notice where you you have to attend with the problem rectified by a set date or they de-register your bike.
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