Yamaha YZ125 2022, Owner'S Service Manual, Page: 74 / 278

ENGINE
3-10
EAM30221
CHECKING THE EXHAUST SYSTEM
1. Remove:
•
Exhaust pipe
• Silencer
Refer to “ENGINE REMOVAL” on page 5-1.
2. Check:
•
Exhaust pipe
• Silencer
Crack/damage

Replace.
Refer to “ENGINE REMOVAL” on page 5-1.
3. Check:
• Silencer fiber
Damage

Replace.
4. Replace:
•
Silencer fiber
a. Remove the silencer bolts “1”, silencer “2”
and fiber bolts “3”.
TIP
Remove the inner pipe while holding the silencer
in place with a vise etc.
b. Remove the inner pipe “1”.
c. Replace the fiber “2”.
d. Install the inner pipe.
TIP
Apply heat-resistant sealant to the areas shown,
making sure that there are no gaps in the beads
of sealant.
5. Install:
•
Gasket “1”
Refer to “ENGINE REMOVAL” on page 5-1.
6. Check:
•
Tightening torques
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.
1. Stand the vehicle upright on a level surface.
2. Remove:
• Radiator cap “1”
1
3
3
3
2
New
Fiber bolt “1”
10 N·m (1.0 kgf·m, 7.4 lb·ft)
LOCTITE®
Silencer bolt “2”
12 N·m (1.2 kgf·m, 8.9 lb·ft)
Side cover bolt (front side)
7 N·m (0.7 kgf·m, 5.2 lb·ft)
Side cover bolt (rear side)
9 N·m (0.9 kgf·m, 6.6 lb·ft)
1
1
T
R
.
.
2
1
1
1