Here's some good pictures of the 450X "Power up" mod to the top of the airbox.
James Dean did them,and the cuts are exactly according to the Honda CC directions,which have you cut along the lines embossed in the molding.We've had several ask about them so here you go :
http://www.pbase.com/jdjetting1/crf450x&page=4
Here's some more pics :
http://i3.photobucket.com/albums/y57/byork/P1010001.jpg
http://i3.photobucket.com/albums/y57/byork/P1010005.jpg
http://i3.photobucket.com/albums/y57/byork/P1010013.jpg
Doug