Honda CRF450R 2009 Service Manual page 130

LUBRICATION SYSTEM
Remove the one-way valve from the right crankcase.
INSPECTION
Check the one-way valve for wear or damage.
Check the oil pump shaft for wear or damage.
Check the oil seal for damage or deterioration, replace
it if
necessary.
After installing
a Check Ihallhe washer and snap ring are installed in the
snap ring, always left crankcase cover securely.
rotate it in Its groove
ro
be sure if
Is
fully
seated.
5-6
Temporarily install the oil pump shaft and inner/outer
rotors into the left crankcase.
Measure the lip clearance.
SERVICE LIMIT:
0.20 mm
(0.008
in)
ONE-WAY VALVE
PUMP SHAFT