2009-2010 Ski-Doo REV-XP/XR 2 Stroke and REV-XR 1200 4-TEC Service Manual, Page 188Get this manual
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Section 02 ENGINE Subsection 15 (BOTTOM END (593))
Bearing(s) should not be heated to more than 80C (176F)Do not heat bearing(s) with direct flame, or with heat gun or soaked in heated oil bathI