2003 Honda ATV TRX650FA Rincon Factory Service Manual, Page 88Get this manual
LUBRICATION SYSTEM
OIL PRESSURE CHECK
Check the oil level and add the recommended oil if neeessary (page 3- 10)Also, check the engine and oil line for external oil leak before checking the oil pressureRemove the oil gallery sealing bolt and washer on the left side of the front crankcase coverNOTE: Clean around the sealing bolt with compressed air before removing the bolt, and be sure that no dirt enters the oil gallery
SEALING WASHER
Connect an oil pressure gauge and hose to the oil gallery holeTOOLS:
OIL PRESSURE GAUGE
Pressure gauge set
Pressure gauge