Yamaha WR450F, Owner'S Service Manual

Page: 392 / 794

4 - 36
ENG
• Remove the bolts.
• Again apply the molybdenum disulfide
grease on the threads and contact sur-
faces of the bolts and on both contact sur-
faces of the plain washers.
• Retighten the bolts.
NOTE:
Tighten the bolts to the specified torque in
two or three steps in the proper tightening
sequence as shown.
T
R
.
.
Bolts (cylinder head):
2nd:
20 Nm (2.0 m • kg, 14 ft • lb)
• Put a mark on the corner
1
of the bolt
(cylinder head) and the cylinder head
2
as shown.
NOTE:
Tighten the bolts 90° in each of the two
steps to reach the specified angle of 180° in
the proper tightening sequence as shown.
T
R
.
.
Bolts (cylinder head):
Final:
Specified angle 180°
1
2
180˚
3. Install:
• Bolt (cylinder head)
1
T
R .
.
10 Nm (1.0 m · kg, 7.2 ft · lb)
CYLINDER HEAD