it sure will, but it's a damn tight fit, and requires ken oconnor's shock bushings just like the 400ex shock
you'll need to cut off the rear fender mount as circled in red above, the plastic and the cooresponding metal tab on the frame
and also the snorkel, and part of the lid it connects to will need removed, leaving you a square hole, flush with the front edge of the airbox
i also had the right side, lower air box rubbing thru the resiviour after a while, seems threre's a brass bushing at the bottom of the air box lid, mounting hole.
remove the screw from the bottom, that holds that bushing in, and the brass bushing, then use a sheet metal screw to hold the lid on
the brass bushing is what the stock machine screw threads into to hold the lid on
of course a cfm airbox cured all this "airbox rubbing" issues