2005 Ski-Doo Tundra, Skandic, Expedition Shop Manual, Page 366Get this manual
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Section 07 TRANSMISSION Subsection 02 (DRIVE PULLEY)
Cam Arm Pivot Nut
At first 10-hour (500 km) cam arm pivot nuts no15 have to be retightenTo do so, loosen one turn all cover screws no2