2003 Bombardier Outlander 400 Factory Service Manual, Page 125Get this manual
Subsection 09
Section 03 ENGINE (CYLINDER AND HEAD)
R400motr67A
R400motr65A
1Cylinder head 2Allen screws 3Camshaft retaining plate
2 thrust washers Rocker arm (exhaust side) Cylinder head spark plug side Big taper to PTO side
Inspection
Rocker Arm Inspect each rocker arm for cracks and scored friction surfacesIf so, replace rocker arm assemblyCheck the rocker arm rollers for free movement, wear and excessive radial playReplace rocker arm assembly if necessary2 1