2007-2011 Polaris IQ Snowmobiles Service Manual, Page 119Get this manual

General Information ENGINE DATA FORMULAS
Compression Ratio

R= (IHVDISP) IHV I= (DISP 25.4)
DISP(PI S) 4

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives