2005 Polaris Sportsman 400/500 Service Manual, Page 69Get this manual
HIGH .002 (.05mm) HIGH .005 (.13mm)
OIL PRESSURE TEST EH50PL
1Remove blind plug on front left cylinder head2Insert 18 NPT oil pressure gauge adaptor into the cylinder head and attach the gauge3Start engine and allow it to reach operating temperature, monitoring gauge indicatorNOTE: Use Polaris Premium Synthetic Engine Lubricant (PN 2871281)Oil Pressure at 5500 RPM (Engine Hot): Standard: 20 PSI Minimum: 12 PSI
2To correct situation like the one shown in the illustration at right, squeeze the crankshaft at point A(Use tool from alignment kit)