What yr YZ muffler and header fit the 11?

8 replies to this topic
  • dirtbikekid32

Posted March 08, 2012 - 06:43 PM


Anyone know what year(s) YZ header and muffler fit the 11 WR 450??
Anything else to have to be done to fit it or does it bolt right on??
Thanks in advance..

  • mikewrf18

Posted March 09, 2012 - 09:30 AM


I'm quite sure 2007 through 2011 YZF exhaust will fit with no mods with the exception of a possible rejet. I have an 08' stock YZF complete exhaust on my 07' aluminum framed WR450F.

Edited by mikewrf18, March 09, 2012 - 09:33 AM.

  • GuyGraham

Posted March 09, 2012 - 10:39 AM


06 to 09 should fit straight on
2010 yzf onwards had reverse clylinder so wont fit

  • mikewrf18

Posted March 10, 2012 - 06:09 AM


06 to 09 should fit straight on
2010 yzf onwards had reverse clylinder so wont fit

Thanks for correcting me on that. I did not know that.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • Taxgod4u

Posted June 23, 2012 - 05:25 PM


will the 06 -09 yz slip ons fit the 2011 WR 450 without replacing the Wr stock header? is this good for a decent power gain or just minimal and how is the sound?

  • n16ht5

Posted June 23, 2012 - 08:54 PM


06 has most power but 100+DB loud
07 is quietest and 2nd best power - IMO best one all around
08-09 best for gnarly ST, bit louder than 07 but about same performance when modded

Whatever you get, get the whole system.
I run the 08 full system on gnar single track, 07 pipe otherwise. Or sometimes my Leo vince super stealth pipe on my super secret squirrel trails

  • Taxgod4u

Posted June 25, 2012 - 07:46 PM


"Whatever you get, get the whole system."

Does yz head pipe give better performance, or the yz slip on just wont fit with he stock WR head pipe?

  • n16ht5

Posted June 26, 2012 - 07:22 AM


both. get the 08-09 yz header, 07 -09 yzf muffler. the stock WR header is too small

  • Taxgod4u

Posted June 27, 2012 - 12:12 PM


can a spark arrestor be added to the 2009 system?


Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.