Air Box Question on 2007 wr450f

4 replies to this topic
  • bruceal

Posted April 15, 2009 - 03:33 AM


What is the best way to modify the air box on a 2007 wr450f? I have jetted the bike and installed a fmf slip-on exhaust, but I am not sure about cutting holes in the plastic air box. I have removed the snorkels. Thank you.

  • stevenacarter77

Posted April 15, 2009 - 05:30 AM


did you take the snorkels base plate off of the air box ? also are you going to install a hi flow air cleaner like a uni ??

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  • William1

Posted April 15, 2009 - 05:37 AM


Once the snorkle and retaining plate is removed, the plastic mounting rectangal can come out too, lift up the batter to see the mounting screws.

  • bruceal

Posted April 16, 2009 - 03:09 AM


OK, great I will give that a try.

  • WR450FGreg

Posted April 16, 2009 - 03:25 AM


I seem to remember Ballards (internationally renowned Australian enduro gurus) recommending three or four 20mm diameter holes be drilled in the bottom of the airbox after the snorkel was removed.



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