Yamaha WR450F 2022, Owner'S Manual

Page: 74 / 176

ENGINE
3-16
TIP
Tap the spark arrester lightly, then use a wire
brush to remove any carbon deposits.
f. Install the spark arrester gasket (new gas-
ket) and spark arrester.
TIP
Insert the spark arrester into the muffler and
align the bolt holes.
g. Install the tail pipe gasket (new gasket)
and spark arrester bolts.
h. Install the silencer cap.
TIP
First tighten the two screws “a” located horizon-
tally apart, and then tighten the others.
6. Check:
• Gasket “1”
Damage

Replace.
7. Check:
•
Tightening torques
8. Install:
• Exhaust pipe protector
EAM30210
CHECKING THE COOLANT LEVEL
WARNING
EWA13030
A hot radiator is under pressure. Therefore,
do not remove the radiator cap when the en-
gine is hot. Scalding hot fluid and steam may
be blown out, which could cause serious in-
jury. When the engine has cooled, open the
radiator cap as follows:
Place a thick rag or a towel over the radiator
cap and slowly turn the radiator cap counter-
clockwise toward the detent to allow any re-
sidual pressure to escape. When the hissing
sound has stopped, press down on the radi-
ator cap and turn it counterclockwise to re-
move.
Spark arrester bolt
9 N·m (0.9 kgf·m, 6.6 lb·ft)
Silencer cap screw
5 N·m (0.5 kgf·m, 3.7 lb·ft)
T
R
.
.
T
R
.
.
1
1
Exhaust pipe nut “1”
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Exhaust pipe clamp bolt “2”
12 N·m (1.2 kgf·m, 8.9 lb·ft)
Exhaust pipe clamp bolt “3”
12 N·m (1.2 kgf·m, 8.9 lb·ft)
Silencer bolt (rear) “4”
30 N·m (3.0 kgf·m, 22 lb·ft)
Exhaust pipe protector screw
10 N·m (1.0 kgf·m, 7.4 lb·ft)
LOCTITE®
T
R
.
.
1 1
2
4
3
T
R
.
.