Honda TRX450R Service Manual page 330

CRANKCASE/TRANSMISSION/CRANKSHAFT/BALANCER (After
f
05)
Place the left crankcase down, separate the right
crankcase from the left crankcase.
RIGHT CRANKCASE
Remove the dowel pins and gasket.
Remove the oil pump shaft, inner and outer rotors
from the left crankcase if necessary.
Remove the reed valve from the right crankcase.
DOWEL PINS
GASKET
OIL PUMP SHAFT
16-12