2009-2010 Ski-Doo REV-XP/XR 2 Stroke and REV-XR 1200 4-TEC Service Manual, Page 460Get this manual
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Section 06 DRIVE SYSTEM AND BRAKE Subsection 03 (DRIVEN PULLEY AND COUNTERSHAFT)
3 Repl ace the sliding sheave if he inner diameter of bushing is out of specification Fixed Sheave Replace ixed s