Yamaha YZ250F Fahrer- Und Wartungshandbuch Seite 318

CYLINDER HEAD
ASSEMBLY AND INSTALLATION
Cylinder head
1. Install:
• Dowel pin 1
• Cylinder head gasket 2
• Timing chain guide (exhaust side) 3
• Cylinder head 4
NOTE:
While pulling up the timing chain, install the
timing chain guide (exhaust side) and cylinder
head.
2. Install:
• Washer 1
• Cable guide 2
• Bolts [L = 145 mm (5.71 in)] 3
• Bolts [L = 135 mm (5.31 in)] 4
• Nuts 5
NOTE:
• Apply the molybdenum disulfide grease on
the thread and contact surface of the bolts.
• Follow the numerical order shown in the illus-
tration. Tighten the bolts and nuts in two
stages.
3. Install:
• Copper washer 1
• Oil delivery pipe 2
• Union bolt (M8) 3
• Union bolt (M10) 4
4. Install:
• Radiator pipe 1
• Bolt (radiator pipe) 2
4 - 32
ENG
38 Nm (3.8 m · kg, 27 ft · lb)
38 Nm (3.8 m · kg, 27 ft · lb)
10 Nm (1.0 m · kg, 7.2 ft · lb)
18 Nm (1.8 m · kg, 13 ft · lb)
20 Nm (2.0 m · kg, 14 ft · lb)
10 Nm (1.0 m · kg, 7.2 ft · lb)