2009-2010 Ski-Doo REV-XP/XR 2 Stroke and REV-XR 1200 4-TEC Service Manual, Page 748Get this manual

2009-2010 Ski-Doo REV-XP/XR 2 Stroke and REV-XR 1200 4-TEC Service Manual, Page 748

Section 02 ENGINE Subsection 04 (LUBRICATION SYSTEM)
Blow air through in let portAir must flow free ly to the outlet port
IVent hose 2Breather

2Un screw and remove breather+11 1'lliJXJ

AIR MUST FLOW

Turn breather upside down and blow air again Air must NOT flow out
'Breather

2Retaining screws