Honda CRF450R 2009 Service Manual page 129

PRESSURE RELIEF VALVE
REMOVAUINSPECTION
Remove the left crankcase cover (page 12-5),
Remove the snap ring and pressure relief valve from
the left crankcase cover.
Remove the O-ring.
Check the pressure relief valve for damage or clogs.
Replace the pressure relief valve if necessary.
INSTALLATION
LUBRICATION SYSTEM
SNAP RING
Apply engine oil to a new D-ring, and install it to the
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pressure relief valve.
ill
OIL PUMP
Install the pressure relief valve into the left crankcase •
cover.
S
Install the snap ring securely.
Inslallthe left crankcase cover (page 12-10).
OISASSEMBL Y
Remove the engine from the frame (page 8-6).
Separate the crankcase halves (page 13-10),
Remove the dowel pins and gasket.
Remove the oil pump inner/outer rotors and oil pump
shaft from the left crankcase.
PINS
5-5