Last Year Kaw Changed the Air Filter Arrangement on their Highly Successful FH series Twins from Vertical to Horizontal..The New Units w/the Horizontal AF were Re badged KAI series and a New Worse Generation of Kaw Twins was Born. The Reason for the Switch is Likely that the Riff Raff was having Problems Assembling the Verticals after Maint. and Demanded Something Simpler so We Got the "Improved" KAI series... Every Single Day the "Improved" KAI series filters must be serviced...They Get Dirty faster than You can say "KAI series Air Filters Suck"....Take out the filter after 1 Day and the pre filter is coated and then Tap the Filter and a Dust Storm eXplodes.... the Old FH Vertical Filters could Go a Week and Still be Cleaner than a KAI after 1 Day... Beware of "New and Improved" Stuff. First pic...Good Air Filter Arrangement. Second pic...Bad Air Filter Arrangement.