2009-2010 Ski-Doo REV-XP/XR 2 Stroke and REV-XR 1200 4-TEC Service Manual, Page 172Get this manual
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Section 02 ENGINE Subsection 14 (TOP END (797))
1 Remove CYLINDER BLOCI( as explained below2 Place clean cloth or the RUBB ER PAD (PIN 529 023 400) over crankcase
MAXIMUM
0.05 mm (.0