1985-1995 Polaris Snowmobiles Master Repair Manual, Page 278Get this manual
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ENGINES Engine Specifications 1988 Models
CylHead CC's Uninstalled
26.5 21.0 21 .0 22.6 26.6 19.5
CylHead CC's Installed
23.7 17.2 17.2 21.8 24.0 20.7