2006-2008 Polaris Snowmobiles FS/FST Service Manual., Page 161Get this manual
FSFST Engine 13Tighten the threaded ram securely against the plate while keeping the pressing pin is square with the head of the chain pinCarefully press the pin through the first set of link plates, but no further14Release the tool, and perform procedure on the other end of the same plate15With both pins pressed out, remove the tool, then remove the plate with chain pins and discardKeep the chain wrapped around the sprocketNOTE: Do not drop the chain into the crankcase16Hold the chain to the camshaft sprocket, then rotate the engine so the cylinder is pointed downcomponentNOTE: Valve guide, valve seat or head reconditioning is not recommendedRepair options include: replacing the complete cylinder head assembly or, replacing the cylinder head casting and transferring the original parts to the new headThe cylinder head casting is fitted with new valve seats and valve guidesNOTE: Do not re-surface the cylinder head or crankcase22To remove the valves from the head assembly, reinstall the four rocker arm shafts back into the rocker arm towers