2009-2010 Ski-Doo REV-XP/XR 2 Stroke and REV-XR 1200 4-TEC Service Manual, Page 124Get this manual

2009-2010 Ski-Doo REV-XP/XR 2 Stroke and REV-XR 1200 4-TEC Service Manual, Page 124

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Section 02 ENGINE Subsection 10 (RAVE (593))
Check for crackeddried or perforated bellows In its stock configurationthe RAVE valve guillotine has minimum of 0.5 mm (.020 in) clearance to the cyl