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 Quiet core insert for q4 muffler

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jbwi112




PostSubject: Quiet core insert for q4 muffler   Thu Apr 13, 2017 2:27 pm

I have the fmf q4 and have repacked it but still just BARELY pass sound check at events. I would like to have a insert shown in this video just in case I dont pass sound check.

https://www.youtube.com/watch?v=Ho8L1-gS8uA

Cant seem to find any info on the insert this guy has or where to buy it

any help

thanks
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rsteiger

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PostSubject: Re: Quiet core insert for q4 muffler   Thu Apr 13, 2017 3:42 pm

jbwi112 wrote:
I have the fmf q4 and have repacked it but still just BARELY pass sound check at events. I would like to have a insert shown in this video just in case I dont pass sound check.

https://www.youtube.com/watch?v=Ho8L1-gS8uA

Cant seem to find any info on the insert this guy has or where to buy it

any help

thanks

This may help you... it appears that you can use another insert from a different FMF pipe and get good results:

http://www.kawasakiforums.com/forum/klx-250s-71/fmf-q4-how-make-quiet-stock-35221/
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jbellyOH




PostSubject: Re: Quiet core insert for q4 muffler   Thu Apr 13, 2017 5:01 pm


Here's the one I just put in my Q4. part #040630. Definitely made a difference.

https://www.denniskirk.com/fmf/powercore-4-quiet-core-insert-040630.p435531.prd/435531.sku
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Biglake




PostSubject: Re: Quiet core insert for q4 muffler   Fri Apr 14, 2017 6:10 am

Weld a washer onto the end of the spark arrester/baffle like this, its free and works well to quiet it down.
http://i74.servimg.com/u/f74/17/97/50/10/baffle12.jpg
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dmmcd

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PostSubject: Re: Quiet core insert for q4 muffler   Fri Apr 14, 2017 10:00 am

The official one from FMF website is FMF p/n 040288:



http://www.fmfracing.com/Product/ProductDetail?CategoryID=344&BikeType=Accessories&BikeMake=&BikeModel=&ParentCategoryID=333&Priority=0&SearchText=#

(You have to click on the 'Items' drop-down, not sure how to link to it directly)

That's the one I have, I think. Probably any of them with the right diameter would work.

I took some partially scientific sound readings and the insert lowered the sound by about 2-3 dB, a noticeable difference.

http://wr250rforum.forumotion.com/t11830-fmf-q4-repack-with-sound-data
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jbwi112




PostSubject: Re: Quiet core insert for q4 muffler   Thu Apr 20, 2017 7:17 pm

jbellyOH wrote:

Here's the one I just put in my Q4.  part #040630.  Definitely made a difference.

https://www.denniskirk.com/fmf/powercore-4-quiet-core-insert-040630.p435531.prd/435531.sku



Thats the one I was looking for Thanks!!
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