2003 Polaris 3 PRO X Factory Service Manual, Page 34Get this manual
ENGINE R(IHV+DISP) IHV(DISP25.4) DISP(PIBBS) 4
IHVDISP=== PIINSTALLED HEAD VOLUME [CC] CYLINDER DISPLACEMENT [CC] COMPRESSION RATIO FULL ENGINE STROKE [CM] INCHES PER CC OF IHV CYLINDER BORE [CM] 3.1416
Bore6.5 cm
Stroke6.0 cmDisplacementBore Stroke
IHV17.1 cc
Displacement199.098 cc R=12.643 IHVDisplacement IHV Full Stroke Compression Ratio
To calculate the Effective Compression Ratio, substitute the exhaust port height for the stroke in the formulas above: Exhaust2.95 cm
Exhaust port height 29.5 mm