Yamaha YZ450F 2021 - Page 211

CYLINDER HEAD
5-25
k. Perform the same procedure with the bolts
[2]–[4] one by one and applying the tight-
ening sequence (f)–(j) as shown for the
bolt [1].
TIP
Do not loosen any other bolt until one bolt is
completely tightened.
l. Put a mark on the corner of the bolt (cylin-
der head) and the cylinder head.
m. Retighten the cylinder head mounting
bolts in the proper tightening sequence.
n. Tighten the bolts to the specified torque.
Bolt [1]
3rd
Specified angle
90
Bolt [2]–[4]
2nd
23 N·m (2.3 kgf·m, 17 lb·ft)
3rd
Specified angle
90
Final
Specified angle
60
Bolt [5], [6]
10 N·m (1.0 kgf·m, 7.4 lb·ft)
90˚
T
R
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T
R
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T
R
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T
R
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