Yamaha YZ250FXM 2021 Owner's Service Manual page 211

Bolt [1], [2], [3], [4]
3rd
Specified angle
60
j. Put a mark on the corner of the bolt (cylin-
der head) and the cylinder head.
k. Finally, tighten all cylinder head tightening
bolts further according to the tightening or-
der.
TIP
Tighten the bolts in two steps 60 to reach the
specified angle in the proper tightening se-
quence. Total tightening angle: 60 + 60 = 120
Bolt [1], [2], [3], [4]
Final
Specified angle
60
l. Tighten the nuts to the specified torque.
Nut [5], [6]
10 N·m (1.0 kgf·m, 7.4 lb·ft)
5-25
CYLINDER HEAD