Aeon 350cc, Service Manual

Page: 82 / 192

ENGINE
4-82
OIL PUMP AND CHAIN INSTALLATION
NOTE: Oil pump is not a serviceable assembly. Do
not disassemble pump. Replace entire component.
1. Inspect the oil pump sealing surface on the crankcase. Apply
a liberal amount of engine oil to the surfaces and pump.
2. Install oil pump as shown. Torque screws to specified
torque.
Oil Pump Cover Screw Torque:
8 Nm
3. Install chain on oil pump and crankshaft sprocket then place
oil pump sprocket into oil pump shaft
4. Install the cir-clip into oil pump shaft.
5. Install oil pump shield.
NOTE: Do not use gasket sealer on the pump mating
surfaces.
PISTON RING INSTALLATION
NOTE: Apply clean engine oil to all ring surfaces and
ring lands. Always check piston ring installed gap
before rings are installed on piston. If the piston has
been in service, clean any accumulated carbon from
the ring grooves and oil control ring holes.
1. Place the oil control ring expander in oil ring groove with
the end gap facing forward. The expander has no up or down
marking and can be installed either way. The ends should butt
squarely together and must not overlap.
2. Install the oil ring top rail with the end gap at least 30
∘
from the end of the expander.
