Yamaha YZ450FX 2019 Owner's Service Manual page 56

ITEM
Shift pedal bolt
AC magneto rotor nut
Stator coil screw
Crankshaft position sensor bolt
AC magneto lead holder bolt
Coolant temperature sensor
Gear position switch bolt
Rectifier/regulator bolt
ECU bolt
Ignition coil bolt
Starter motor bolt
Nut (holder)
Throttle position sensor screw
Intake air pressure sensor screw
TIP
Cylinder head bolt
First, tighten the cylinder head bolts to 40 N·m (4.0 kgf·m, 30 lb·ft) in the proper tightening sequence
and remove them. Retighten the cylinder head bolts to 22 N·m (2.2 kgf·m, 16 lb·ft) in the proper tight-
ening sequence. Tighten all bolts to reach the specified angle (90) in a diagonal sequence, and then
tighten the cylinder head bolts further to reach the specified angle (No. 1, 2, 3: 60/No. 4 90) in the
proper tightening sequence. (The first and second time, be sure to apply molybdenum disulfide grease
to the bolt threads and seats as well as to both sides of the washers.)
Thread
Q'ty
size
M6 1
M12 1
M5 3
M6 2
M5 1
M10 1
M5 2
M6 2
M5 2
M6 2
M6 2
M6 1
M5 1
M6 1
FWD
x3 x1
3 3
1 1
2-13
TIGHTENING TORQUES
TIGHTENING TORQUES
12 N·m (1.2 kgf·m, 8.9 lb·ft)
65 N·m (6.5 kgf·m, 48 lb·ft)
10 N·m (1.0 kgf·m, 7.4 lb·ft)
10 N·m (1.0 kgf·m, 7.4 lb·ft)
8 N·m (0.8 kgf·m, 5.9 lb·ft)
15 N·m (1.5 kgf·m, 11 lb·ft)
3.5 N·m (0.35 kgf·m, 2.6 lb·ft)
7 N·m (0.7 kgf·m, 5.2 lb·ft)
3.8 N·m (0.38 kgf·m, 2.8 lb·ft)
7 N·m (0.7 kgf·m, 5.2 lb·ft)
10 N·m (1.0 kgf·m, 7.4 lb·ft)
8 N·m (0.8 kgf·m, 5.9 lb·ft)
3.5 N·m (0.35 kgf·m, 2.6 lb·ft)
3.5 N·m (0.35 kgf·m, 2.6 lb·ft)
2 2
4 4
Remarks

LT
LT
LT
LT