Yamaha WR450F(T) - Page 370

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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.
N
OTE:
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.
N
OTE:
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:
• Nut (cylinder head) 1
T
R
.
.
10 Nm (1.0 m · kg, 7.2 ft · lb)
4. Install:
• Copper washer 1
• Oil delivery pipe 2
• Union bolt (M8) 3
• Union bolt (M10) 4
New
T
R
.
.
18 Nm (1.8 m · kg, 13 ft · lb)
T
R
.
.
20 Nm (2.0 m · kg, 14 ft · lb)
CYLINDER HEAD