2008-2010 Kawasaki KFX450R Factory Service Manual, Page 140Get this manual
FUEL SYSTEM (DFI) 3-83 Air Cleaner
Air Cleaner Duct and Resonator Tank Installation
projection [D] on the ductthe resonator tank holder [A] so that the "UPPER" Install[B] faces tank side and slit [C] on the holder fit to the mark