WR muffler on a YZ?


4 replies to this topic
  • Scott-YZ450

Posted January 21, 2008 - 03:30 AM

#1

Hi,

I am new to this forum so go easy on me! I have a 03 YZ450f with a standard muffler on it and its much louder than I would like it too be. I can get hold of a 04 WR450 muffler for peanuts. Will it fit and if so will I need to make any jetting adjustments?
I know that the WR muffler is heavy and restrictive but at present I cant afford to pay out for a FMF Q (or similar) UK prices are steep compared to the US around £280 which over $500 USD just for the can!!
Any help would be much appreciated.

Cheers
Scott

  • William1

Posted January 21, 2008 - 03:42 AM

#2

Will need the correct slip joint gasket (WR). May well need to go to a smaller main jet after the swap.

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  • MaxPower

Posted January 21, 2008 - 03:57 PM

#3

[COLOR="Green"]get the DBdawg silencer insert
Its only 30 dollars and takes the bite out of the sound. I put one in a YZ silencer on my WR. Im happy with mine
You dont want a WR silencer[/COLOR]

  • dirtysouth

Posted January 21, 2008 - 04:25 PM

#4

[COLOR="Green"]get the DBdawg silencer insert
Its only 30 dollars and takes the bite out of the sound. I put one in a YZ silencer on my WR. Im happy with mine
You dont want a WR silencer[/COLOR]


He's right, WR muffler will require thinner jets due to less airflow....Less Air => Less Fuel => Less Noise => More Roost:thumbsdn:

  • Scott-YZ450

Posted January 22, 2008 - 12:30 AM

#5

Ok cheers for your input guys. I have seen the DBdawg silencer insert advertised but I read a test on a YZ450F and it only lowered the noise by 3db which is not a great deal of difference??? I guess the best way to find out is test one out.




 
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