2003 Suzuki LT-Z400 Factory Service Manual, Page 40Get this manual
PERIODIC MAINTENANCE
Check Ihe engine oil pressure This will give indication of the condition of the
Oil pressure: Above 20 kPa (0.2 Below 60 kPa (0.6
2.8 8.5 of the following conditions:
Low or high oil pressure can indicate
LOW OIL PRESSURE from the oil O-ring Defective oil pumpCombination of the above items oil viscosity is too oil passage Combination of the above items