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Enduro Engine 4 stroke (including EFI & Exhaust) 4 stroke engine, EFI, and exhaust discussion


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  #11  
Old 04-14-2008, 08:52 PM
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http://www.dirtrider.com/features/14...est/index.html


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  #12  
Old 06-13-2008, 09:28 PM
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I need to make my FMF Q quieter. I'm doing the Colorado 500 this year and they are serious about riding quiet.

With a freshly repacked muffler I'm right at 96DBa,the max for the 500. That's too close for comfort.

FMF hasn't been able to help. Moto Billet either.

Anybody have any ideas?
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  #13  
Old 06-13-2008, 11:01 PM
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Not spark arrestor legal but i could send you a stock Kreiger that is dead quiet for the ride. Call me about it. Cell 775-934-0268 Nick
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  #14  
Old 06-14-2008, 07:53 AM
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Any news about a USFS SA end cap for the Kreiger Nick? I like the exhaust as it is (quiet) but I am mindful of the problems I am likely to get in some areas as we move west
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Old 06-14-2008, 07:03 PM
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It wont be for the Kreiger but for the GG muffler on 07-08 and possibly 06. I have a benefit ride next saturday and after that i can take a muffler to Idaho for them to work from.
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  #16  
Old 06-15-2008, 12:03 PM
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I have to have a spark arrestor, most of the riding on the 500 is on national forest land.


I emailed some other manufacturers but no luck.

I have a 2005 Gas Gas 450 FSE that I'm preparing for the Colorado 500 off-road ride. The stock FMF Q is much too loud even with fresh packing.

I need a slip-on that will register under 96DBa, preferably even quieter . FMF isn't able to help.

Do you have anything that might fit? I can send the FMF slip-on to you to check for possible fitment.

Sincerely,

Sander Avant

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I am sorry to say that we do not offer an exhaust system for your bike.
Best regards! Mit freundlichen GrĂ¼ssen!Meilleures salutations!
Migliori saluti! Met vriendelijke Groeten! Mejor saludos!
Pro Circuit Racing International

Sorry, we don’t offer anything for the Gas Gas bikes. We just different slip-joints and measurements and the chance of something bolting up is slim.
LeoVince USA

Unfortunately we do not make anything for that specific application. I apologize for the inconvenience. Thanks for your interest in Yoshimura!
Yoshimura Sales

Last edited by sanderjavant; 06-24-2008 at 09:40 PM.
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  #17  
Old 06-28-2008, 09:58 PM
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I made a crude modification to the insert and seems quieter. Once I test it with a DB meter I'll post the results.

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  #18  
Old 07-21-2008, 09:25 PM
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Even with that big ole washer I'm still right at 96DBa. It seems to be running leaner with obstruction.

I do know that when I ran the bike on the leaner map with the muffler in the stock configuration it was louder.
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  #19  
Old 08-01-2008, 03:30 PM
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Unhappy Quiet insert?

That is discouraging! I just got a(nother) "turn down, quiet, SA end cap from FMF. Having looked at my existing one with the big hole through the center I figured it was either the wrong insert or modified - Wrong, the new one is just the same. How can you have that big of an outlet and still call it a Spark Arrestor? My next step was goin to be to restrict it more like in the above picture but it sounds as though that isn't going to help much.
I see that Pro Moto has an end cap and insert but I think that it is for the Kreiger, anyone know what size, model, part number or other way of identifying the FMF "Q" is that most of us ended up with? Mine came from the dealer with it, don't believe he changed it though. I was going to contact Pro Moto to see if they have anything to help the "Q" but figure that I might need more information to give them. Tried FMF but haven't heard back.
Bruce
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  #20  
Old 08-01-2008, 07:05 PM
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I got an email back from Pro Moto saying the end cap/insert won't fit an FMF Q.

http://www.promotobillet.com/catalog...products_id/47
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