Yamaha 2004 YP400, Service Manual, Page: 233 / 417

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ENG
CYLINDER HEAD
CHECKING THE TIMING CHAIN GUIDE
(EXHAUST SIDE)
1. Check:
• timing chain guide (exhaust side)
Damage/wear
→
Replace.
EAS00232
INSTALLING THE CYLINDER HEAD
1. Install:
• timing chain guide (exhaust side)
• cylinder head gasket
• dowel pins
2. Install:
• cylinder head
NOTE:
_
Pass the timing chain through the timing chain
cavity.
3. Tighten:
• cylinder head nuts
1
• cylinder head nuts
2
NOTE:
_
• Lubricate the cylinder head nuts with engine
oil.
• Tighten the cylinder head nuts in the proper
tightening sequence as shown and torque
them in two stages.
New
3
2
1
4
2
1
T
R
.
.
40 Nm (4.0 m · kg, 29 ft · lb)
T
R
.
.
52 Nm (5.2 m · kg, 37 ft · lb)