Yamaha YFZ450S 2003 Service Manual page 166

2
1
2
CYLINDER HEAD
h. Put a mark on the corner 1 of the cylinder
1
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.
2
L LLL
4. Install:
• cylinder head nuts
180˚
5. Install:
• copper washers
• oil delivery pipe 1 1
• union bolts (M8) 2
• union bolt (M10) 3
3
4 - 23
head bolt and the cylinder head 2 as
shown.
Cylinder head bolts
Final
Specified angle 180°
L LLL L L LLL L L LLL L
10 Nm (1.0 m · kg, 7.2 ft · lb)
New
18 Nm (1.8 m · kg, 13 ft · lb)
20 Nm (2.0 m · kg, 14 ft · lb)
ENG
L LLL L L LLL L LLL