2003 Bombardier Outlander 400 Factory Service Manual, Page 126Get this manual
Section 03 ENGINE Subsection 09 (CYLINDER AND HEAD)
Check adjustment screws for free movement, cracks andor excessive play
Push in rocker arm shaft no11 until its chamfer reaches the end of rocker arm boreR400motr69A
1Free movement of adjustment screw top
Rocker Arm Shaft Check for scored friction surfaces; if so, replace partsMeasure rocker arm shaft diameter
R400motr66B
1Rocker arm shaft 2Thrust washer (MAG side) 3Thrust washer (PTO side)
R400motr70A
AMeasure rocker arm shaft diameter here