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Going back to Stock muffler
Posted: 10:21 am Mar 29 2012
by terminatr
Hi. My KDX came with a FMF muffler and a FMF fat pipe. I want to buy a stock muffler from Ebay to quiet the bike down.
(1) Is stock muffler compatible with my FMF fat pipe?
(2) If I install a stock muffler, will I need to rejet the bike?
Posted: 10:31 am Mar 29 2012
by scheckaet
1 yes
2 no
Posted: 12:15 pm Mar 29 2012
by Julien D
Did you try to repack the FMF? It should be relatively quiet. Good for you on keeping it as quiet as possible!
Posted: 01:16 pm Mar 29 2012
by terminatr
Yes, I repacked it with FMF material. The bike is relatively quiet compare to MX bikes at the track. But I want to get as much quiet as I can. Trying to go stealth. Neighborhood backwood recon mission. My XR200 is much quieter.
Posted: 06:43 pm Mar 29 2012
by Julien D
Stock silencer will probably be a touch quieter. The stock pipe would certainly quiet it down even more, for stealth missions!
Posted: 07:07 pm Mar 29 2012
by David_L6
I'm running an FMF pipe and stock silencer. I like quiet too.
Posted: 11:14 pm Mar 29 2012
by diymirage
if you are willing to trade off power for silence you could go with the stock exhaust pipe
Posted: 11:49 pm Mar 29 2012
by scheckaet
you're not losing any power when installing the stock muffler
nothing wrong in wanting a quieter bike and virtually no power loss...
Posted: 07:52 pm Mar 30 2012
by diymirage
scheckaet wrote:you're not losing any power when installing the stock muffler
nothing wrong in wanting a quieter bike and virtually no power loss...
Wasn't talking about the mufler...I thought we had decided on that already
I was talking about the expansion chamber
Posted: 07:52 pm Mar 30 2012
by diymirage
scheckaet wrote:you're not losing any power when installing the stock muffler
nothing wrong in wanting a quieter bike and virtually no power loss...
Wasn't talking about the mufler...I thought we had decided on that already
I was talking about the expansion chamber
Posted: 11:15 am Mar 31 2012
by Mr. Wibbens
juliend wrote:Stock silencer will be much quieter. The stock pipe would certainly quiet it down even more, for stealth missions!
fixed
Posted: 04:20 pm Mar 31 2012
by Julien D
As you like. I didn't really notice much difference in noise level between the FMF, DG, or stock silencer. The stock double walled expansion chamber soaks up a lot of noise. I'd wager that the stock expansion chamber with either silencer would be quieter than an aftermarket expansion chamber and stock silencer. Be a fun test, anyway.
Posted: 07:56 pm Mar 31 2012
by Mr. Wibbens
Carvr's stock pipe is so quiet you can't tell when he is right on your six
Posted: 09:08 pm Mar 31 2012
by it175
Posted: 03:02 am Apr 01 2012
by factoryX
I almost went back to the stock exhaust as well, but decided to mod a trx250r Q silencer to fit, 94db anyone?
Posted: 01:18 pm Apr 01 2012
by Mr. Wibbens
6db louder than my Turbine Core
Posted: 09:24 pm Apr 01 2012
by factoryX
right..
Posted: 10:23 pm Apr 01 2012
by SS109
factoryX wrote:right..
We sound test all bikes in the AMRA series and KDX's with stock silencers normally test out at 88 or 89db.
Posted: 12:11 am Apr 02 2012
by factoryX
He stated with that figure with the turbine core, but that's crazy quiet with stock. Need to get my bike tested, but I have never ran into freaking ranger. Its way quieter than the PC S/A that came on it. FMF claim 96DB with the Q silencer, which is their second most quiet silencer, first being the Q stealth..
