WR muffler on a YZ


8 replies to this topic
  • KAS

Posted August 25, 2007 - 11:43 AM

#1

Has anybody done this?

I just brought my YZ450F home. Holy buckets, its loud! I figure I could find stock WR muffler somebody has taken off for a good deal, if it would work ok.

  • mr426

Posted August 25, 2007 - 01:11 PM

#2

i think it will fit, the yz and wr use the same aftermarket exhaust part numbers. it will cork it up though and you might need to re jet it.

  • rexbond007

Posted August 25, 2007 - 02:16 PM

#3

wr muffler is a little more restrictive..

guys put yz mufflers on their wr's to get more hosepower.

  • cowboyona426

Posted August 25, 2007 - 05:36 PM

#4

Don't put a WR can on your YZ, a quiet pipe will give better performance and weigh less. Nearly everyone offers them now, the ones I seem to hear the most good about are the FMF's and Leo Vince's.
OT- where in OR are ya?

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  • woodswr

Posted August 25, 2007 - 05:41 PM

#5

Has anybody done this?

I just brought my YZ450F home. Holy buckets, its loud! I figure I could find stock WR muffler somebody has taken off for a good deal, if it would work ok.

Don't use the Wr pipe, it is way to restrictive. I just took one off of mine and used the yzf can.

  • fatchellparty

Posted August 25, 2007 - 06:15 PM

#6

it will be quieter but have way less power, it has a AIS system i believe, i think that lets air into it somehow to decrease the emissions. someone please correct me if im wrong lol.

  • grayracer513

Posted August 25, 2007 - 07:02 PM

#7

You're wrong. :excuseme: The WR450 has an AIS, but it isn't an integral part of the exhaust system.

  • KAS

Posted August 25, 2007 - 08:20 PM

#8

OT- where in OR are ya?


Coos Bay.

  • KAS

Posted August 25, 2007 - 08:22 PM

#9

I'm really not too worried about losing a couple ponies on a 450.

It just needs to be more quiet.

I think I might look into a Leo Vince. My buddy has one on his '07 and has passed 96dB sound tests.





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