2004 Skidoo Tundra Skandic Series Service Manual, Page 230Get this manual
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Section 05 TRANSMISSION Subsection 03 (DRIVE PULLEY)
At first 10-hour (500 km) cam arm pivot nuts no15 have to be retightenTo do so, loosen one turn all cover screws no2 Retighten to 5.6 Nm (50