Yamaha RS90GTZ Service Manual page 256

CYLINDER HEAD
• Tighten the cylinder head bolts further to
reach the specified angle 175 ~ 185° in the
proper tightening sequence as shown.
Cylinder head bolt (M10):
Final:
Specified angle 175 ~ 185°
WARNING
When the bolts are tightened more than the
specified angle, do not loosen the bolt and
then retighten it.
Replace the bolt with a new one and per-
form the procedure again.
NOTICE
• Do not use a torque wrench to tighten the
bolt to the specified angle.
• Tighten the bolt until it is at the specified
angle.
TIP
When using a hexagonal bolt, note that the
angle from one corner to another is 60°.
3. Tighten:
• Cylinder head bolts (M6)
Cylinder head bolt:
12 Nm (1.2 m•kgf, 8.7 ft•lbf)
5-31
ENG