2005-2009 Honda TRX400EX/TRX400X Service Manual, Page 225Get this manual
FRONT WHEElSUSPENSIONSTEERING pivot collars from the arm pivots
INSPECTION
Check the spherical bearings in the arm pivots for wear or damage
COLLARS Inspect th ball joint boot for tears or other damage by moving the ball joint stud It should moves freely and smoothly