Quiet Exhaust Pipe


29 replies to this topic
  • Ricks426

Posted February 21, 2011 - 07:43 PM

#1

Has anyone tried a FMF Q series muffler on a 2000 yz426f? I want a quieter exhaust over the stocker. Is there something else that is better suited for this bike. I want to sacrifice very little
power.

Edited by Ricks426, February 22, 2011 - 04:13 PM.


  • ttr250dude

Posted February 21, 2011 - 09:59 PM

#2

Typicaly when you get a quieter muffler you give up a some power. Somebody correct me if need be...

  • wags450

Posted February 22, 2011 - 08:35 AM

#3

Typicaly when you get a quieter muffler you give up a some power. Somebody correct me if need be...


In my experience this is mostly true. Most of the time by them restricting the sound its also restricting the flow.

Its usually louder because its more open and less restrictive which lets the big dog eat.

Really depends on how they silence it though.

  • Ricks426

Posted February 22, 2011 - 04:10 PM

#4

I should have stated..."I want to lose the least amount of power as I have to." I know you always sacrifice a little.

  • wanawakeboard

Posted February 22, 2011 - 04:54 PM

#5

I dont know if there is anything quieter than the stock pipe except maybe a stock pipe off another bike. most folks get louder pipes to make more power (sometimes obnoxiously loud)
has your stock pipe been modified? maybe something like this?

http://www.motocross...954&language=en or
http://www.blackdogd...ealthMeBaby.htm or
http://www.dirtrider...p?threadid=4791

EDIT: yea I did some research I guess these bikes are pretty loud... try the links above, I stand corrected...

Edited by wanawakeboard, February 22, 2011 - 08:12 PM.


  • grayracer513

Posted February 22, 2011 - 06:46 PM

#6

I dont know if there is anything quieter than the stock pipe...

On a 2000 426?! That's funny...

A Q4 will be quite a bit quieter at a limited expense in terms of power.

  • 02WR426Cali

Posted February 22, 2011 - 07:10 PM

#7

I did a little customizing and fit the new style better looking and performing Q4 from the 03-05 yz450 on my bike. It did not bolt right up I had to clearance it a little by the frame and the motor where the midpipe is and move the midpipe mount and weld it in a defferent spot. It looks good, fits nicely now and performs great! I am pretty sure the Q4 they sell for the 426 is just a re-badged Q2. I personally like the looks of the Q4 better and it wasn't too much work to make it fit. Another member on here did it first and that gave me the idea. It is a little fatter and bigger than the stock one but all quiet pipes will be. It doesn't stick out too much just a little below the side panel but all in all looks good.

Posted Image
Here you can see the part that gets close to the motor and needs a little clearancing. I used heat and a socket to dent it in slightly.
Posted Image
Here is the part that is close to the frame and also the shock resivor. When I'm on the bike there is more clearance between the resivor and the pipe. It doesn't effect the shock.
Posted Image

  • Ricks426

Posted February 22, 2011 - 07:52 PM

#8

On a 2000 426?! That's funny...

A Q4 will be quite a bit quieter at a limited expense in terms of power.


Ya I thought that was pretty funny too!!! The bike is loud even with ear plugs in....the only thing I will miss is the ATV's pull into the trees when they hear me coming up behind them!:smirk:

  • Mr. Neutron

Posted February 22, 2011 - 08:27 PM

#9

Does anyone here have any experience with a Dr. D quiet core insert?

Posted Image

I'm gonna go out on a limb here, and guess that it would stifle power somewhat? Does it quiet down a Dr. D a good bit? I have a really good next door neighbor that's mentioned the YZ "sure seems quite a bit louder than yer orange bike was".......

I will repack my Dr. D soon; I have no idea how many hours it has on it. But it certainly sounds like it could use some new junk inside the can..... Just thought about trying the insert, to keep my neighbors happy...... It looks like it would come out easy enough for my "track days".....

Jimmie

  • 426 hemi

Posted February 23, 2011 - 02:48 AM

#10

try a db dog insert they seem to help cheep and no power lose

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • grayracer513

Posted February 23, 2011 - 07:34 AM

#11

try a db dog insert they seem to help cheep and no power (loss)

Not true according to what most others have posted.

  • Digger01

Posted February 23, 2011 - 10:37 AM

#12

I picked up a Pro Moto billet silencer with a spark arrester- The label is stamped right on the removable piece that holds the spark arrestor “Pro Moto Billet YZ426” (Haven’t seen one since).

I have put in the spark arrestor and it is even quiter and it does not back fire. Yes it took out a lot of power but has made riding in the woods possible and fun because other riders tell me my bike is whisper quite now. I am yet to have it measured by a sound meter.

We do ride mx track but its nothing like stock. Solves the problem of the front wheel lifting up all the time. It is a direct fit and I change it depending on where we are going.

  • Mr. Neutron

Posted February 23, 2011 - 11:40 AM

#13

By any chance do these corked up bikes with quiet inserts, doing a lot of low rpm & slow speed slogging, have more glowing head pipe incidences than the bikes with more open exhausts? :smirk: I can get mine to glow really easily, in a short period of time, by simply jumping my firewood logs on my property..... :lol: I realize that a glowing header isn't the end of the world as we know it, but I would like to minimize it, if possible...... I ride mostly track, where that's not an issue, but do like to plunk around some...... :rant:

Jimmie

  • grayracer513

Posted February 23, 2011 - 12:05 PM

#14

The spark arrestor in and of itself should not be a factor in either performance or sound. The SA on my DRD pipes make no difference to either.

  • humpness

Posted February 23, 2011 - 05:37 PM

#15

get a Q4 and megabomb. just as quiet or more than my friends wr450 with the stock exhaust.

  • myoung

Posted February 24, 2011 - 01:10 PM

#16

I have a Q2 and a power bomb on my '00 426. It didn't lose much power and it's considerably quieter than the stock exhaust, but without testing, I feel it's probably on the ragged edge of being quiet enough for passing a test. You'd probably have to stay on top of packing religiously to keep it legal all the time.

To be fair though, I haven't noticed any difference in sound over the time I've had it and it's still the original packing with about 75-100 hours on it. I've even raced MX with it and didn't have any trouble keeping up with all the guys with their ridiculously loud exhaust's, so take that for what it's worth.

As was posted earlier, the Q4 looks like it's basically the same part so you could probably expect the same result, but I'd still look at the Q4 over the Q2 today. The Q4 wasn't around when I got my Q2 so that was my best option at the time. I would think the Q4 would have some new technology that could bring the sound down some more, but I don't really know. It does look a little cooler. :smirk:

  • TT-AAAR

Posted March 03, 2011 - 06:33 PM

#17

I've even raced MX with it and didn't have any trouble keeping up with all the guys with their ridiculously loud exhaust's, so take that for what it's worth.

I would think the Q4 would have some new technology that could bring the sound down some more, but I don't really know. It does look a little cooler. :thumbsup:


This is why I just ordered one. My buddy just put one of these on his 250F. He didn't touch jetting and it still runs great. And it's noticeably quieter. I don't hear him come up behind me anymore. And when I am behind him (not very often :smirk: ) I can barely hear it over my stock exhaust. He says it initially felt slower just cuz it didn't make as much noise.

I was happy with my stock exhaust from a performance perspective. But noise and no S/A is asking for a ticket in the woods.

  • Ricks426

Posted March 04, 2011 - 04:55 AM

#18

That is good news...my exhaust is on order, just hope I don't have the play with the carburator, not very good at setting them. The performance with my stock pipe is exceptional... but my wife says she can still here my bike when I ride 5 miles away from camp.

  • TT-AAAR

Posted March 04, 2011 - 05:24 PM

#19

well my Q4 showed up about 30 minutes ago, and believe it or not I'm not busy installing it right now! :thumbsup:

I THOUGHT the Q4 design was an "open" muffler with some fancy technology to reduce the sound. But when I take the spark arrestor out, I see another baffle down in this pipe, which i was not expecting. I'm going to research this a bit more before I put it on. The reason for this purchase was to add a sparky, not to plug up my exhaust.

My buddy's bike really runs great with a Q4 installed, so I'm trying to be optimistic. But I guess I just didn't see the baffle down in there; otherwise, I would have bought one of those end caps and called it good...

Aaargh...

  • humpness

Posted March 04, 2011 - 05:53 PM

#20

I didn't notice any improvements over stock. Just quiet. Nice to ride the woods during hunting season and not get shot





Related Content

Forums
Photo

Megabomb Fitment by 288yz450


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply
Forums
Photo

The "going back to the other darkside" adventure... by Monk


Dirt Bike   Make / Model Specific   KTM   250/350/450/505 SX-F & XC-F (4-Strokes)
  • Hot  94 replies
Wiki
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info


Articles
  • 0 replies
Forums
Photo

James Stewart back on a YZ450F by YamaLink


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies
Forums
Photo

yz250x vs 450 4t comparisons (preferably desert riding) needed by JakeNorthrupYZ450F


Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • 9 replies
 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.