2009-2010 Ski-Doo REV-XP/XR 2 Stroke and REV-XR 1200 4-TEC Service Manual, Page 618Get this manual
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Section 08 TECHN ICAL SPECIFICATIONS Subsection 04 (800R MODELS)
NGK BR9ECS Not adjustable 0.70 to 0.80 (.028 to .032) 2.37 mm (.093 in) 3500 RPM 190 to 300 0.1 to 1.0 0.3 to 0.7