quietest muffler


22 replies to this topic
  • kball

Posted October 22, 2007 - 10:35 PM

#1

I just bought a '99 yz400. It has a white bros e-series full system that is LOUD. I'd like to know which of the 98-02 mufflers is the quietest, stock or aftermarket? Is there a difference from a stock WR and YZ mufler? I'd imagine there is, but i've never seen them side by side. I just want the lowest DB possible cause it's gonna be my city bike. Thanks

  • JSanfilippo

Posted October 22, 2007 - 10:38 PM

#2

Fmf Q2

  • Mutu

Posted October 22, 2007 - 10:54 PM

#3

Is there a difference from a stock WR and YZ mufler?

Yes.

You could try to get an old WR muffler, or FMF Q2 as JSanfilippo says. :crazy:

  • speedcomm

Posted October 23, 2007 - 04:04 AM

#4

99 WR muffler is whisper quiet, 99 YZ muffler is loud

  • GCannon

Posted October 23, 2007 - 08:36 AM

#5

I just replaced a YZ muffler with a new FMF Q2.

The YZ was very loud and the new Q2 is much quieter I love the new muffler.

The power difference is less than I thought. I notice a difference at full throttle high RPM. The low end power is great so close I can't tell if it is the same or better with the Q2.

  • byggd

Posted October 23, 2007 - 08:58 AM

#6

I just bought a '99 yz400. It has a white bros e-series full system that is LOUD. I'd like to know which of the 98-02 mufflers is the quietest, stock or aftermarket? Is there a difference from a stock WR and YZ mufler? I'd imagine there is, but i've never seen them side by side. I just want the lowest DB possible cause it's gonna be my city bike. Thanks

I took the same system off my 02 WR for the same reason and put the stock unit back on. Without an insert it's a little loud but not too bad. The stock insert was too restrictive so I bought this one and it's right were I like it.
http://www.promotobi.../products_id/54

  • tmckeown

Posted October 23, 2007 - 08:59 AM

#7

I use Silmotor on my bike, it is quiet enought to get to enduro races over here. Acropovitch is too loud even with noisekiller

Timo McKeown

  • DanyR1

Posted October 23, 2007 - 03:54 PM

#8

I have a stock wr400 1998 in realy good shape I am from canada to I can make you a very good deal if you are interested.

  • maxtherat

Posted October 23, 2007 - 05:34 PM

#9

Best bet would be fmf q2.

  • Mutu

Posted October 23, 2007 - 05:43 PM

#10

Best bet would be fmf q2.

It would make the bike look a bit more modern too! :crazy:

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  • mc250f

Posted October 23, 2007 - 05:47 PM

#11

+7(i think 7) on the Q

  • Bleeds_Blue

Posted October 23, 2007 - 07:59 PM

#12

I just bought the Q and it's nice and quiet.

  • WGP

Posted October 24, 2007 - 06:12 AM

#13

Does it have any horsepower though?

I'm also looking for a under 96db muffler and have the Ti Powercore, it really helped in the speed dept.

It is 97db with the quiet insert.

Can anybody compare the 2?

  • maxtherat

Posted October 24, 2007 - 05:51 PM

#14

I heard that the q4 is quieter and gives more power than if you use a powercore w/ quiet core insert. Obviously, this means nothing to us guys that have 02 and older bikes.

  • JSanfilippo

Posted October 24, 2007 - 08:04 PM

#15

I heard that the q4 is quieter and gives more power than if you use a powercore w/ quiet core insert. Obviously, this means nothing to us guys that have 02 and older bikes.


Well I heard :crazy: that the TI powercore with quiet insert shows no discernable difference from an open TI powercore. A TI powercore flows significantly better than a Q4

  • KennyMc

Posted October 24, 2007 - 08:23 PM

#16

How does the quiet insert affect the spark arrestor on the TI Powercore? Can you run both?

  • JSanfilippo

Posted October 24, 2007 - 10:38 PM

#17

How does the quiet insert affect the spark arrestor on the TI Powercore? Can you run both?


yes. The old school factory 4/Titanium 4 was an either/or deal and probably what you're thinking about.

  • Lennie

Posted October 24, 2007 - 11:10 PM

#18

You want a euro spec FMF Q pipe, its even quieter than a US spec one.

  • WGP

Posted October 25, 2007 - 06:14 AM

#19

I run a Ti Powercore and for the races throw in the quiet insert I can hardly tell the difference, but there seems to be a little less punch with it in.
The problem is with the quiet insert it is still over 96db.

  • WGP

Posted October 25, 2007 - 06:16 AM

#20

How does the quiet insert affect the spark arrestor on the TI Powercore? Can you run both?


The quiet insert is simply a metal sleeve the fits in the end, the spark arrestor is always in.




 
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