APRILIA 854239, Service Station Manual

Page: 127 / 216

•
Place the piston in the cylinder liner (3).
•
Place the cylinder liner (3) in the crank-
case.
•
Fit the pin.
•
Position the pin locking ring.
•
Close the cap (4).
Installing the cylinder head
•
Smear a thin layer of Loctite 510
matching the unions between both
crankcase halves.
•
Fit the centring bushings.
•
Fit a new cylinder-head gasket.
•
Position the cylinder head.
•
Insert the four cylinder head bolts to-
gether with the washers.
NOTE
LUBRICATE THE HEAD BOLT THREADS AND THE SEAL
SURFACES WITH ENGINE OIL.
•
Screw the four cylinder head bolts
working in crossed sequence and us-
ing a roundhead universal socket
wrench if required.
NOTE
SCREW THE CYLINDER HEAD BOLTS PAYING ATTEN-
TION TO THE TIGHTENING SEQUENCE AND THE COR-
RECT TORQUE, IN TWO STAGES.
•
Place the timing system gear (3) to-
gether with the timing chain (4) on the
camshaft (2).
•
Screw but do not tighten the screw fix-
ing the timing system gear (3) on the
camshaft (2).
•
Position the chain tensioner slider (1).
CAUTION
THE CAMSHAFT SCREW OF THE FRONT CYLINDER
WORKS ANTICLOCKWISE.
MXV 450
Engine
ENG - 127