2005 Kawasaki KAF400 Mule 600 and Mule 610 4x4 Service Manual, Page 169Get this manual
ENGINE BOTTOM END 8-23 Breather
Breather Valve Removal
assembly Remove the cylinderinheadEngine Top(see Cylinder Head Assembly Removal the End chapter)Unscrew the breather valve screw [A]
Breather Valve Installation