2004-2009 Suzuki LT-Z250 Service Manual, Page 38Get this manual
PERIODIC MAINTENANCE
OIL PRESSURE CHECK
Check the engine oil pressure periodicallyThis will give good indication of the condition of the moving parts Oil pressure: Above 30 kPa (0.3 kgfcm 4.3 psi)Below 70kPa (0.7 kgfcm 9.9 psi) ,