2009-2010 Ski-Doo REV-XP/XR 2 Stroke and REV-XR 1200 4-TEC Service Manual, Page 613Get this manual
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Section 08 TECHNICAL SPECIFICATIONS Subsection 04 (800R MODELS)
82 mm (3.228 in) 75.7 mm (2.98 in) 799.5 cml (48.79 in3) 12.2 0.5 8150 100 RPM 34 .08 ml to 37.26 ml (1 .15 U.SOl to 1.26 U