SuzukiSavage.com - Dyna Muffler installed: loud with throttle closed?

Fishbulb

Ex Member

Dyna Muffler installed: loud with throttle closed?
09/08/14 at 12:06:15

Savages,

Installed my Dyna muffler this weekend (rail mount, looks to have a cat). Install was smooth, don't seem to have any leaks. Muffler sounds good, bike seems to run good.

Carb is original jetting (i think!), 2 washers for the white spacer and I think 1.5-2 turns out. We are about 4-500 ft above sea level.

However, when riding and I close the throttle, I get a lot more noise. No hard backfires or anything, just a lot of burbling, etc. at a much higher volume.

Is this normal? Anything I should check? I plan to rejet when I put in the K&N... only time for one project at a time!

Thanks!

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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28387 Tucson Az Gender:	Re: Dyna Muffler installed: loud with throttle clo Reply #1 - 09/08/14 at 12:10:16 Normal.. What,.. you don't like it?... ...
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bobert_FSO

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Re: Dyna Muffler installed: loud with throttle clo
Reply #2 - 09/08/14 at 12:28:34

The dyna mufflers are nothing compared to the Emgo shorty megaphone muffler or any mostly open muffler or pipe.

With the Emgo, closing the throttle to decelerate sounded like a diesel truck with a jake brake kicked in. Just a loud "blat blat blat" until the engine speed neared idle, then a lot of gurgling and burping. No loud gunshot afterfires.

It sounded better backing off then when accelerating.

Big singles sound like that. My high-school Ducati 250 did the same thing. They also get a real hollow-sounding exhaust note when the engine is running at a nice cruising speed and the throttle is held open just enough to maintain the current speed (overrun condition)

It's just the nature of the beast. Embrace it.

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Fishbulb Ex Member	Re: Dyna Muffler installed: loud with throttle clo Reply #3 - 09/08/14 at 13:26:21 Oh, i have no problems with it...as long as I am not F-ing anything up! It does, however, confirm that I would not be a straight pipe guy... Thanks!
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verslagen1

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Re: Dyna Muffler installed: loud with throttle clo
Reply #4 - 09/08/14 at 14:03:14

Fishbulb wrote on 09/08/14 at 12:06:15:

However, when riding and I close the throttle, I get a lot more noise. No hard backfires or anything, just a lot of burbling, etc. at a much higher volume.

Normal, sort of like a Jacobs brake on a diesel.

consider it a polite way of saying "get the hell outta may way"

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Ed L.

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Re: Dyna Muffler installed: loud with throttle clo
Reply #5 - 09/08/14 at 15:40:34

Had a Dyna muffler, put it on my bike and rode it for a day then took it off. Screwed up the carb tuning and was way too loud, top speed was 85mph. Went back to a sporty with a 1/2 hole drilled through the baffle and the bike runs like stink up to 94mph. Raps and burbles on slowdown from speed, sounds like it is singing.
With the stage 1 cam I'm hoping for the ton. Some back pressure is a good thing for the engine breathing.
Different bikes like different tuning. Find what works for yours.

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Silver '02, clubman handle bars, Cobra headlight, Sportster muffler, K+N stock air filter, 152.5 main, Superbrace, oil cooler, 1/2 inch aluminium plate forward controls, spark advance, goes like stink

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Fishbulb

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Re: Dyna Muffler installed: loud with throttle clo
Reply #6 - 09/08/14 at 18:04:29

Pardon my ignorance, but what is the difference? I thought they were all pretty much the same except the mounting options...???

Thank you!

Ed L. wrote on 09/08/14 at 15:40:34:

Had a Dyna muffler, put it on my bike and rode it for a day then took it off. Screwed up the carb tuning and was way too loud, top speed was 85mph. Went back to a sporty with a 1/2 hole drilled through the baffle and the bike runs like stink up to 94mph. Raps and burbles on slowdown from speed, sounds like it is singing.
With the stage 1 cam I'm hoping for the ton. Some back pressure is a good thing for the engine breathing.
Different bikes like different tuning. Find what works for yours.

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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28387 Tucson Az Gender:	Re: Dyna Muffler installed: loud with throttle clo Reply #7 - 09/08/14 at 18:07:40 Fishbulb wrote on 09/08/14 at 18:04:29: Pardon my ignorance, but what is the difference? I thought they were all pretty much the same except the mounting options...??? Thank you! Probably had no baffle at all... not stock...
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Ed L. Serious Thumper Alliance Member Offline "We All go a Little Crazy Sometimes" Norman Bates Posts: 2808 Sunny Florida Gender:	Re: Dyna Muffler installed: loud with throttle clo Reply #8 - 09/08/14 at 19:26:46 Never checked the Dyna for baffles, it was a $5.00 flea market buy during bike week. I would think Serowbot is right about the baffles, don't know cause the Dyna went into the trash a long time ago.
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28790 L.A. California Gender:	Re: Dyna Muffler installed: loud with throttle clo Reply #9 - 09/08/14 at 21:36:05 Look at the ass end with a butt light in hand. if you see black hole all the way thru, then you don't have a baffle. If you see a plate about half way thru the muff, then you have a baffle. if you have a long enough probe, stick it in, if it stops, then you have found something.
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Dyna Muffler installed: loud with throttle clo Reply #10 - 09/08/14 at 21:54:02 verslagen1 wrote on 09/08/14 at 21:36:05: Look at the ass end, if you have a long enough probe, stick it in, if it stops, then you have found something. Quoted for its understated brilliance
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Serowbot

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OK.... so what's the
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Re: Dyna Muffler installed: loud with throttle clo
Reply #11 - 09/08/14 at 22:19:18

verslagen1 wrote on 09/08/14 at 21:36:05:

Look at the ass end with a butt light in hand.
if you see black hole all the way thru, then you don't have a baffle.
If you see a plate about half way thru the muff, then you have a baffle.
if you have a long enough probe, stick it in, if it stops, then you have found something. Huh

What's a "butt light"?... oooooooo....never mind,...I don't want to know... Huh

...

Verse... there is no, single, phrase,... in that post...
Cheeze Whiz,.... this is such an unfortunate question... Undecided

...

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Ed L. Serious Thumper Alliance Member Offline "We All go a Little Crazy Sometimes" Norman Bates Posts: 2808 Sunny Florida Gender:	Re: Dyna Muffler installed: loud with throttle clo Reply #12 - 09/09/14 at 06:42:31 LOL, you have a sick mnd
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