2006-2008 Polaris Snowmobiles FS/FST Service Manual., Page 139Get this manual
FSFST Engine Measure Piston Ring Groove Clearance Out of specification: Replace ring(s) andor pistonsVerify Starter Motor Clutch Operation 12Starter gearclutch must move smoothly when rotated clockwiseStarter gearclutch cannot move when rotated counterclockwise Replace assembly if clutch does not operate correctly or if rotation is rough3Inspect starter gear and timing rotor teeth for damageReplace assembly if damage is found
Chain Tensioner Operation 123Push tensioner into housing until flush with housing endTensioner should lock into placeSix (6) audible "clicks" should be heard and felt as tensioner is pushed into housingOnce locked, push tensioner inwardTensioner should activate and spring outwards Replace tensioner assembly if clicking is not heardfelt, tensioner will not lock, or does not activateEXTENDED