1999-2004 Honda TRX400EX FourTrax Service Manual, Page 57Get this manual
LUBRICATION SYSTEM
OIL PUMPSTRAINER
REMOVAL
Remove the right crankcase cover (page 9-21, Remove the clutch outer (page 9-5)Remove the three mounting bolts and the oil pump
Remove the gasket and two dowel pins
RELIEF VALVE CHECK
- cotter pinstopper plate