2009-2010 Ski-Doo REV-XP/XR 2 Stroke and REV-XR 1200 4-TEC Service Manual, Page 785Get this manual
Section 02 ENGINE Subsection 07 (TIMING CHAIN)
'NoW' Im proper ca mshaft iming will damage engine compon entsMake sure camshafts and crankshaft are still lockedIf not, lock them before beginning this procedure1Install timing chain NOTE: If the same timing chain is reinstalled, make sure to reinsta ll it in the same operating direction as marked during removal procedure2Reinstall lower chain guide to fit timing chain correctly on crankshaft timing gear, Re tall1;ng screw 2Distance slee ve 3Chain gUide
Chain Guide Inspection (Tensioner Side)
Check chain guide for wear, cracks or deforming Rep lace as required Replace chain guide if grooves depth (ca used by timing chain) exceed 1.2 mm (,0472 in!
1 Lower cham gUide 2Crankshaft timmg gear
3Continue with TIMING CHAIN GEAR INSTAL LATION (see procedure in his subsection), to achieve proper camshaft timing 4Install al other removed parts 11 1 1,