2006-2008 Polaris Snowmobiles FS/FST Service Manual., Page 141Get this manual
FSFST Engine Valve Train Assembly
7 Ft.Lbs (10 Nm)
CAM SHAFT AXLE CAM SHAFT CLAMPS CAM SHAFT
CRANKCASECYLINDER HEAD NUTS STEP ONE: 15 Ft.Lbs(20 Nm) STEP THREE: 30 Ft.Lbs(40 Nm) STEP FOUR: TURN 180 APPLY ENGINE OIL TO THREADS