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Exhausts Exhausts - Headers, Mid Pipes, Mufflers


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September 25th, 2013, 12:35 PM   #1
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2010 FE390 - Stock Muffler mods?

Have a USA FE390 2010.. with the more restrictive pipe. Bike came with an Akrapovic system, but it was too loud so I went back to stock on the muffler... however I noticed the bike runs warmer than before. I read on here about cutting and pulling pipes out of the stocker.. but not really any reports of noise difference. Can someone chime in on a mod that will not make it louder but will help flow a bit better?



PS, I would sell the Akra slip on if someone wants it.
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September 25th, 2013, 02:58 PM   #2
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Re: 2010 FE390 - Stock Muffler mods?

Try this post!: viewtopic.php?f=26&t=14322&p=124583

Seems to be a worthwhile thing to do. Louder but not bad, and yummy sound.
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September 25th, 2013, 07:27 PM   #3
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Re: 2010 FE390 - Stock Muffler mods?

Did you akra pipe have the quiet insert?

Cutting the pipe is OK and makes things a lot better, but still lacking. It is not loud at all in the end.

The third option is to not fuss with it and buy a $350 FMF Q pipe.
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September 26th, 2013, 10:00 AM   #4
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Re: 2010 FE390 - Stock Muffler mods?

The Akra has the quite insert, supposed to be 94db.. sounds about equal to an FMF Q4 (had one before, meh). Just too loud.. I ride areas that see five times more hikers and horseback riders than dirt bikes, so the noise needs to be kept down. I saw that mod before, looks like it might make it too loud. Maybe i'll look at pulling out that turbine looking thing?
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September 26th, 2013, 12:04 PM   #5
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Re: 2010 FE390 - Stock Muffler mods?

That turbine is the spark arrestor.

I cut the end of the pipe/cap, and left the turbine. Not running the end screw on cap. surprised to hear you say the q4 is loud. my buddy has a q4 on his fs570 and it is no louder than mine.
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