2006-2008 Polaris Snowmobiles FS/FST Service Manual., Page 169Get this manual
FSFST Engine 2Insert the timing chain into the chain galleryWiggle the chain slightly until it falls down through the cylinder headsecure with new master linkAllow about four to five chain links to protrude from the cylinder head
CAM LOBE SCRIBE LINE PARAELLE WITH EDGEInsert the soft-end of the timing chain hook tool, PN PW47108, and jam the chain against the balance shaft sprocketVerify the gear timing dots are still in alignmentGuide the timing chain under the crankcase support, towards the chain guide, and around the crankshaftAllow the chain to fall out through the cylinder head
Verify timing dots on the crank train drive gears are in alignment and the camshaft alignment scribe line is parallel with the camshaft axle clamp edge9Remove the installation tools from the crankcase and rotate the engine on the stand so the cylinder head is pointed up10Install new master link plate on the timing chain using the timing chain breaker tool, PN PW-46985Press the pins and plates together using the rounded pin and fitting without holeNOTE: Do not over-press and damage the chain pins and plates6Position the camshaft from the MAG-side of the engineRotate the camshaft so the cam lobes are pointed towards the crankshaft and the alignment line on the cam lobe is parallel with the camshaft axle clamp edge(See Photo) Wrap the timing chain around the sprocket and temporarily