Yamaha WR450FR Owner's Service Manual page 153

CYLINDER HEAD
Remove the bolts.
G
Again apply the molybdenum disulfide
G
grease on the threads and contact sur-
faces of the bolts and on both contact sur-
faces of the plain washers.
Retighten the bolts.
G
NOTE:
Tighten the bolts to the specified torque in
two or three steps in the proper tightening
sequence as shown.
1
Put a mark on the corner 1 of the bolt
G
(cylinder head) and the cylinder head 2
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.
180˚
3. Install:
4. Install:
4 - 32
Bolts (cylinder head):
2nd:
20 Nm (2.0 m • kg, 14 ft • lb)
Bolts (cylinder head):
Final:
Specified angle 180˚
Nut (cylinder head) 1
G
10 Nm (1.0 m · kg, 7.2 ft · lb)
Copper washer 1
G
Oil delivery pipe 2
G
Union bolt (M8) 3
G
18 Nm (1.8 m · kg, 13 ft · lb)
Union bolt (M10) 4
G
20 Nm (2.0 m · kg, 14 ft · lb)
ENG
New