Yamaha WR250F 2023, Owner'S Manual

Page: 73 / 176

ENGINE
3-15
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
WARNING
EWA19350
• Be sure the exhaust pipe and muffler are
cool before cleaning the spark arrester.
• Do not start the engine when cleaning 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:
• Spark arrester
Carbon deposits

Clean.
5. Clean:
•
Spark arrester
a. Remove the silencer cap screws “1”.
b. Remove the spark arrester bolts “2”.
c. Remove the tail pipe “3”, tail pipe gasket
“4” and spark arrester “5”.
TIP
Pull the spark arrester out of the muffler.
d. Remove the spark arrester gasket “6”.
e. Clean the spark arrester.
1
1
1
1
2
3
4
5
6