2009-2010 Ski-Doo REV-XP/XR 2 Stroke and REV-XR 1200 4-TEC Service Manual, Page 123Get this manual
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Section 02 ENGINE Subsection 10 (R AVE (593))
TYPICAL GUllotme 2 Gasket Valv p,ston
TYPICAL
9 Remove the small spring retaining bellows to valve base
7 Rem