2003 Ski-Doo ZX Series Factory Shop Manual, Page 369Get this manual
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Section 10 TECHNICAL DATA Subsection 02 (ENGINES)
SUMMIT 800 HOR HIGHMARK (CANU.S 793 82.00 (3.228) 75.70 (2.980) 799.20 (48.77) 13.3 7850 STN.A0.4 (.016) 1.0 (.039) 0.05 (.0020) 0.2 (.00