2009-2010 Ski-Doo REV-XP/XR 2 Stroke and REV-XR 1200 4-TEC Service Manual, Page 326Get this manual
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Section 04 FUEL SYSTEM Subsection 04 (E-TEC DIR ECT FUEL INJE CTION)
Start the engine Bring engine speed above 5200 RPM and vary engine RPM above 5200 RPM Needle of knock sensor signal sh