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Sylvain

Noisy YZ pipe VS restrictive WR pipe

29 posts in this topic

I just finished reading the "Quiet please" topic in the general forum. We can't be against noise reduction. A 93 db limit for all pipe makers (like the ktm 450 has) would be : The best way to bring good opinions on our sport, and improve the environnement.

So in this frame of mind, :cry: I'm considering changing the YZ model I have installed on my wr to a much more quiet pipe. But I don't want to go back to the original heavy and restrictive CND pipe. When I installed the YZ pipe it seemed to be the best choice, low cost, lighter and less restrictive. But I find the noise level higher than what I'd like.

What mod can be done to the yz pipe to make it quiter ? (Suggestions)

Which quiet pipe exist on the market for my wr 426 ? (Light and not too restrictive and if possible not too expensive)

I know the quiet pipe topic came up before, but may be someone has new ideas or a pipe maker offers a new quiter product !

Thanks

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I just finished reading the "Quiet please" topic in the general forum. We can't be against noise reduction. A 93 db limit for all pipe makers (like the ktm 450 has) would be : The best way to bring good opinions on our sport, and improve the environnement.

Well if you believe what you wrote above you will run the stock pipe with the stock insert. It is the quietest out there.

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I can't installed the stock insert because the Canadian wr pipe has the end welded and the hole is about the size of a quarter.

Referring to:

But I don't want to go back to the original heavy and restrictive CND pipe

Do you have an option to propose ? I read that the FMF Q is pretty good for bringing the noise down but it had some issues related to quality.

Thanks for your input.

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Do you have an option to propose ? I read that the FMF Q is pretty good for bringing the noise down but it had some issues related to quality.

My friend put the FMF Q on his 03 XR. Sounds a bit more throaty than the stocker but its a good soft tone. He likes it a lot and its not loud by any means.

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There is no other option if you believe that noise is as harmful as what you posted.

On the other hand I run a FMF Q on my WR. It is a let down from an open end pipe but way more power than the clogged up stock WR pipe. Sound readings are something like 90DB for the stock WR pipe, 96DB for the FMF Q and 103 DB for an corked WR.

Noise is power with a 4 stroke. You need to make a decision on what you need/want for power and your feelings on the sound issue.

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On the same subject, I need to make a decision about my '05 wr450. Right now I have the stock pipe with the "cork" (looks like what I'd call a dia. reducer) taken out. I had read that a stock YZ450 pipe was a cheap alternative to buying a brand new aftermarket exhaust system. What I have been considering is a '03 YZ450 pipe and installing the Pro Moto Billet end-cap with the silencer for an extra $30 bones. All together this set-up will cost me right around $210 bucks. Thats $120 for the end-cap, $30 for the silencer, and $50 for the '03 YZ pipe (a buddy of mine had a pipe that he replaced). If you're doing the math and think I am confused, I added tax to the $150 for the cap and silencer........ Does anyone have an opinion on whether or not this is a good route to take or if it seems too costly? My brother has an '01 YZ426 that he put the Pro Moto Billet cap and silencer on and it is louder than my stock "uncorked", but the dealership he bought the Pro Moto stuff from said it makes it right at 96db with the silencer. Thanks in advance for any help/opinions.

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I made an alloy insert to go in the exit of my YZ pipe. It made it a tad quiter down low, but still loud up top. The local bike exhaust shop will make a flared inset to whatever db I want, noise tested before and after for $AU30. Gotta get around to doing that sometime soon. When I want ultra quiet (when I'm riding where I shouldnt be :cry: ) I just throw the WR pipe back on.

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Noise is power??? No, noise is shut down riding areas. My YZ has the stock pipe and is LOUD. My WR has the stock pipe/silencer and the GYT insert. The WR has WAY more low end grunt than the YZ.

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Noise is power??? No, noise is shut down riding areas. My YZ has the stock pipe and is LOUD. My WR has the stock pipe/silencer and the GYT insert. The WR has WAY more low end grunt than the YZ.

Don noise is power plain and simple when it comes to an engine. Little engine 101. A 4 stroke needs to breath to make power. Ever seen a top fuel dragster? There not that loud cause they think it's cool. Short unresticted pipes with as little bends as they can get away with. We need to make compromises on the power we get and the noise we are willing to live with.

Now for the real issue, here we go again. Noise is not shutting down areas. Care to give some proof of an area shut down because of noise. Not the "I say it is" but real proof, like a link. Bet ya can't.

What shuts down areas is endanger species, claims of enviro damage, frivoulos injury lawsuits, urban encroachment.

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At least on the 250f's, the stock yz muffler is actually a good bit more quite than an uncorked wr muffler. Unfortunately, on a little 250, the Q is just too restrictive to make decent power. I think that for a 400 and up though, I would definately go for the FMF Q series.

I can think of two proposed riding areas in SC that never came to be, primarily because of noise concerns. I can't prove that quiter exhausts would majically open these areas up, but I think that in general it would help us if the average bike were quiter.

I personally don't have the most quite system, but I do keep my muffler packed and run an add-on spark arrester that reduces the sound very slightly.

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What mod can be done to the yz pipe to make it quiter ? (Suggestions)

I ride an 01 Yz426 and noise was an issue for me mainly because my riding buddies claimed the stock pipe was loud enough to make their ears bleed :cry::cry: I did finally cave into their complaining and did something about it though, I bought a DR. D endcap (100.00) with the spark arrestor quite core insert (30.00) and couldnt be happier with the way it performs and sounds. Its much quieter and I dont think it hurt the power at all.

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You know Sylvain, I'm with the guys that think that the less noise you make, the less people know you're there and the best it is.

That said, I don't think the YZ pipe you have is an issue. It's not that loud...

I've ridden with a friend last year that had a Yoshi on his DRZ400... that was loud! :cry: We could hear him from miles. :cry:

After making some research myself a couple of months ago I ended up with only three solutions.

1- YZ pipe

2- FMFQ

3- FMF PCIV with the insert

As you know, we'll be able to test the PCIV with the insert next season. I bought one used and should receive it in the next couple of days...

Also, one TT fellow did show me how to drill holes in the end part of the stocker we have on our bikes. Just a little bit more noisy, more power, but the problem when compared to the 1-2-3 options I mentioned above is the weight... Yz pipe and the FMFs are way lighter than this friggin cdn pipe we have.

Honestly I'm not looking for more power. I have plenty enough to play with even with the stock WR pipe on. I'm more concerned about having a fairly quiet pipe that is lighter than the original one.

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Don noise is power plain and simple when it comes to an engine. Little engine 101. A 4 stroke needs to breath to make power. Ever seen a top fuel dragster? There not that loud cause they think it's cool. Short unresticted pipes with as little bends as they can get away with. We need to make compromises on the power we get and the noise we are willing to live with.

Now for the real issue, here we go again. Noise is not shutting down areas. Care to give some proof of an area shut down because of noise. Not the "I say it is" but real proof, like a link. Bet ya can't.

What shuts down areas is endanger species, claims of enviro damage, frivoulos injury lawsuits, urban encroachment.

Rex, your railing on this here and on rec.moto.dirt is becoming stale. First, it's obvious you have little understanding of how a 4-stroke works. Back pressure is necessary for proper cylinder scavenging, which is why an open exhaust system often robs low and midrange power. Believe me, I've done extensive dyno testing on motorcycles that bears this out. A dragster is not a valid comparison as the only concern they have is evacuating the cylinder as quickly as possible with as little restriction as possible while turning better than 12K rpm. Not exactly the concern of your average dirt or street bike rider.

As for your continued assertion about noise not being an issue, this past year a pilot program was done near Pomona near Glen Helen. A track was allowed a permit for 4 months to see if the noise would be objectionable to residents. Unfortunately, the track did not survive the test and has not reopened.

Aside from tracks, about the only place I can ride my WR is at Gorman. I rode there last Friday and Saturday. On Saturday upon entering, the ranger at the gate collected my $5 and proceeded to whip out a long rod and walk towards my bike. I informed him that I just bought the bike and did not have a sticker yet. He replied, "Oh, we don't care about the sticker, I'm checking you for a spark arrestor or removed baffle." He then informed me that they will be looking real hard for bikes that violate the sound regulations. This explained why two of the five cars in front of me were turned away. Good thing he wasn't there Friday (no rangers during the week) because I was riding the bike as it had been delivered: without the stock baffle. I was concerned about the loudness and stopped at Simi Cycles on the way home and bought the GYT-R insert.

The point is that noise is quickly becoming an issue and should not be ignored. Maybe you haven't seen it yet, but it is a real problem for others and not just in CA. Please stop saying it isn't. There was an article just this past week about noise issues in Riverside/San Bernardino causing people to consider a ban on riding on private property. Interesting that you cite urban encroachment in your list. What about that encroachment into riding areas do you think bothers non-riders most? The fact that there are riders nearby or that they can't hear their TVs over the din of dirt bikes? Hmm...

RADRick

www.mcjournalist.com

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RadRick,

Well said. The only way we can keep existing areas open is to police ourselves and apply pressure to the open piped riders. Imagine if 1 out of 2 cars on the street ran open headers. I have a really good time riding my bike on the trails and it doesn't need to be loud.

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On the same subject, I need to make a decision about my '05 wr450. Right now I have the stock pipe with the "cork" (looks like what I'd call a dia. reducer) taken out. I had read that a stock YZ450 pipe was a cheap alternative to buying a brand new aftermarket exhaust system. What I have been considering is a '03 YZ450 pipe and installing the Pro Moto Billet end-cap with the silencer for an extra $30 bones. All together this set-up will cost me right around $210 bucks. Thats $120 for the end-cap, $30 for the silencer, and $50 for the '03 YZ pipe (a buddy of mine had a pipe that he replaced). If you're doing the math and think I am confused, I added tax to the $150 for the cap and silencer........ Does anyone have an opinion on whether or not this is a good route to take or if it seems too costly? My brother has an '01 YZ426 that he put the Pro Moto Billet cap and silencer on and it is louder than my stock "uncorked", but the dealership he bought the Pro Moto stuff from said it makes it right at 96db with the silencer. Thanks in advance for any help/opinions.

I think you should put your $210.00 to better use. The '05 has aluminum exhaust stock already. The '04's and prior had different pipes thus alot of owners were switching with the YZ pipe. Are you gaining anything at all>?>?

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RadRick,

Well said. The only way we can keep existing areas open is to police ourselves and apply pressure to the open piped riders. Imagine if 1 out of 2 cars on the street ran open headers. I have a really good time riding my bike on the trails and it doesn't need to be loud.

Thanks, Don. Unfortunately, being a Harley guy, I am in the minority of my peers and colleagues on this subject. Too many of them are exactly the kind of jerks that run open pipes on anything with two wheels because of lame beliefs like "loud pipes save lives" or that it's just cool to be loud. With the Japanese bikes trying so hard to mimic Harleys, many of those riders are now following the same path as the Harley riders by modifying their exhausts for more sound. All this does is make John and Joan Q. Public disdain anything with 2 wheels, dirt or street. These are usually the kind of people who are or know someone on the city council or in local government. The kind of people who think laws should be enacted for their personal benefit rather than those of society as a whole. :cry:

I now have to put up with an 8 month riding season because some beauracrats decided dirt bikes were polluting too much. They conveniently overlooked city-operated diesel buses and trucks, unregulated lawn equipment, and even backyard barbecues, which pollute far more than all the dirt bikes in this state combined and do it all year long. And cops that turn a blind eye to gross polluters that drive by them spewing smoke from poorly maintained vehicles. :cry:

By locking me out from riding on public lands 4 months a year all they have done is take revenue away from a state in dire need of it. Since the racer can race all year round on private tracks, what has really been accomplished with the red stickers? My bike meets both EPA/CARB sound and emissions regs, but because of the expense of certification, Yamaha chose not to submit it for testing. So I now have a bike that doesn't pollute, but still can't be ridden 4 months out of the year. Meanwhile, a smokey 2-stroke just a year older gets a green sticker (my nephew's YZ250). Is this what the EPA/CARB had in mind? It is if you accept that their end desire is to rid the planet of recreational motorcycles. We're an easy group to target because we have a hard time getting past our own petty bickering to mount a valid response. :cry:

I'll get off my soapbox now, but the point is that until the rider in Michigan realizes that a land closure in Oregon is just as important to him and his riding future, we will continue to see our foes take more and more of our land away. :cry:

Rick A. Diaz

www.mcjournalist.com

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Rick if it's getting stale don't read it, part of the joy of the reading is skipping what you don't want to read.

Yep you are correct on your description of power but you know as well as I do that the loud exhust make more power. Why are all the national guys running loud pipes? Is it cause it's cool? Nope because they need/want that power.

Rick now here is what is getting stale is that you and others stating that I don't think noise is an issue. It is an issue, it's not closing areas. Don't be fooled by what we can accomplish by less noise.

The rangers testing your bike doesn't equate to an area being closed.

I'm familiar with the Pamona track closing. It is one of only 2 closures accross the country because of noise and in both of those they all ready had restrictive noise policy. Pamona banned some bikes even. So how quiet were the bikes gonna have to be to keep this track open or was it doomed from the start?

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I think you should put your $210.00 to better use. The '05 has aluminum exhaust stock already. The '04's and prior had different pipes thus alot of owners were switching with the YZ pipe. Are you gaining anything at all>?>?

Thanks Texas, thats what I was unsure about..........whether I would be gaining a thing at all. Hence, my question. Hehe. Would a Pro Moto end cap on my existing stock pipe be a good option in your opinion? Would I gain anything from that? Thanks in advance.

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Why don't you just purchase a PMB end cap and silencer for next to nothing and keep the YZ exhaust system.... It's much better than the WR exhaust.

Bonzai :cry:

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I had an FMF mega max with 6 plates on my YZ WR400.

It was too loud,for the Calibogie boogie 2 years ago and had to drop to 2 plates for that ride. When I got it home I reinstalled the stock silencer . I find I have better low end now and still have more than enough on top. I ride a lot of tight stuff . Its not hard to make little mistakes with the power my 400 put out.

I have even consitered going back to WR timming.

I'll say it again - more power + tight trails = Less handling

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