Air Box Question on 2007 wr450f

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.

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 ??

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.

OK, great I will give that a try.


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.


Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now