Yamaha YZ125 2021 - Checking the Exhaust System

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. Check:
• Gasket “1”
Damage  Replace.
Refer to “ENGINE REMOVAL” on page 5-1.
TIP
Install the gaskets with their depressed “a” fac-
ing outward.
6. Check:
• Tightening torques
1
1
1
2
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)
LOCTITE®
Side cover bolt
7 N·m (0.7 kgf·m, 5.2 lb·ft)
New
T
R
.
.
LT
LT
2
2
1
1
1