2008 Polaris ATV Predator 50, Sportsman Outlaw 90 Service Manual, Page 57Get this manual
ENGINETRANSMISSION Cylinder Head Removal
REMOVE: 123Bolt (A)Nuts (B) evenly in cross pattern until looseCam sprocket bolts (C)NOTE: Mark or tag rocker arms and shafts to keep them in order for assemblyREMOVE: 1Right cylinder head coverPull rocker shaft using bolt
Rocker Arm DisassemblyInspection
NOTE: Cylinder head must be removed to service the rocker arms