Yamaha YZ450FX 2023, Owner'S Manual

Page: 62 / 164

ENGINE
3-14
EAM30222
CHECKING THE FUEL LINE
1. Remove:
• Seat
•
Side cover (left/right)
• Air scoop (left/right)
•
Fuel tank
Refer to “FUEL TANK” on page 6-1.
2. Check:
• Fuel hose “1”
Crack/damage

Replace.
Loose connection

Connect properly.
3. Install:
• Fuel tank
Refer to “FUEL TANK” on page 6-1.
• Air scoop (left/right)
•
Seat
• Side cover (left/right)
Refer to “GENERAL CHASSIS” on page 4-1.
EAM30476
CHECKING THE CYLINDER HEAD
BREATHER HOSE
1. Check:
•
Breather hose “1”
Crack/damage

Replace.
Loose connection

Connect properly.
NOTICE
ECA14920
Make sure the cylinder head breather hose is
routed correctly.
EAM30221
CHECKING THE EXHAUST SYSTEM
1. Remove:
• Exhaust pipe 1
•
Exhaust pipe 2
Refer to “EXHAUST SYSTEM” on page 5-1.
2. Remove:
• Exhaust pipe protector
3. Check:
• Exhaust pipe 1
•
Exhaust pipe 2
• Silencer
Crack/damage

Replace.
4. Check:
•
Silencer fiber
Damage

Replace.
5. Replace:
• Silencer fiber
a. Remove the bolts “1” and silencer body
“2”.
NOTICE
ECA25800
Do not hit the silencer stay “a” as it may do
damage to the silencer.
TIP
Remove the inner pipe while holding the silencer
in place with a vise etc.
1
1
1