Yamaha WR450F 2021 Owner's Service Manual page 66

Item
Shift guide bolt
Stopper lever bolt
Shift pedal bolt
Generator rotor nut
Stator coil screw
Crankshaft position sensor bolt
Stator coil assembly 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 23 N·m (2.3 kgf·m, 17 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 (60) in the proper tightening se-
quence. (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 2 10 N·m (1.0 kgf·m, 7.4 lb·ft)
M6 1 10 N·m (1.0 kgf·m, 7.4 lb·ft)
M6 1 12 N·m (1.2 kgf·m, 8.9 lb·ft)
M12 1 65 N·m (6.5 kgf·m, 48 lb·ft)
M5 3 10 N·m (1.0 kgf·m, 7.4 lb·ft)
M6 2 10 N·m (1.0 kgf·m, 7.4 lb·ft)
M5 1 8 N·m (0.8 kgf·m, 5.9 lb·ft)
M10 1 15 N·m (1.5 kgf·m, 11 lb·ft)
M5 2 3.5 N·m (0.35 kgf·m, 2.6 lb·ft)
M6 2 7 N·m (0.7 kgf·m, 5.2 lb·ft)
M5 2 3.8 N·m (0.38 kgf·m, 2.8 lb·ft)
M6 2 7 N·m (0.7 kgf·m, 5.2 lb·ft)
M6 2 10 N·m (1.0 kgf·m, 7.4 lb·ft)
M6 1 8 N·m (0.8 kgf·m, 5.9 lb·ft)
M5 1 3.5 N·m (0.35 kgf·m, 2.6 lb·ft)
M6 1 3.5 N·m (0.35 kgf·m, 2.6 lb·ft)
2-13
TIGHTENING TORQUES
Tightening torques Remarks
LT
LT

LT
LT
LT
LT