Yamaha YZ450FT Automobile User Manual


 
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ENG
CYLINDER HEAD
ASSEMBLY AND INSTALLATION
1. Install:
Timing chain guide (front) 1
Dowel pin 2
Cylinder head gasket 3
Cylinder head 4
N
OTE:
While pulling up the timing chain, install the
timing chain guide (front) and cylinder head.
New
2. Install:
Plain washer 1
Bolt [L = 160 mm (6.30 in)] 2
Bolt [L = 150 mm (5.91 in)] 3
Installation steps:
CAUTION:
Tighten the cylinder head using the rota-
tion angle procedure to obtain uniform
tightening torque.
Wash the threads and contact surfaces of
the bolts, the contact surfaces of the plain
washers, the contact surface of the cylin-
der head, and the threads of the crank-
case.
Apply the molybdenum disulfide grease on
the threads and contact surfaces of the
bolts and on both contact surfaces of the
plain washers.
Install the plain washers and bolts.
Tighten the bolts to the specified torque in
two or three steps in the proper tightening
sequence as shown.
T
R
.
.
Bolts (cylinder head):
1st:
30 Nm (3.0 m kg, 22 ft lb)