Checking The Carburetor Joint; Checking The Carburetor Hoses; Checking The Exhaust System - Yamaha YZ250 2021 Owner's Manual

7. Apply:
• Lithium soap base grease
(on the matching surface "a" on air filter ele-
ment)
8. Install:
• Air filter element "1"
• Washer
• Fitting bolt
Fitting bolt
2.0 N·m (0.20 kgf·m, 1.5 lb·ft)
TIP
Align the projection "a" on filter guide with the
hole "b" in air filter case.
ECA26420
NOTICE
Make sure that the air filter element is prop-
erly seated in the air filter case. The engine
should never be operated without the air fil-
ter element installed, otherwise the piston(s)
and/or cylinder(s) may become excessively
worn.
EAM30541

CHECKING THE CARBURETOR JOINT

1. Check:
• Carburetor joint "1"
Cracks/damage  Replace.
a
EAM30542

CHECKING THE CARBURETOR HOSES

The following procedure applies to all of the fuel
and vacuum hoses.
1. Check:
• Fuel hose
• Carburetor breather hose "1"
• Overflow hose "2"
Cracks/damage  Replace.
Loose connection  Connect properly.
EAM30221

CHECKING THE EXHAUST SYSTEM

1. Remove:
• Exhaust pipe
• Silencer
2. Check:
• Exhaust pipe
• Silencer
Crack/damage  Replace.
3. Check:
• Silencer fiber
Damage  Replace.
4. Replace:
• Silencer fiber
a. Remove the silencer bolts "1", silencer "2"
3-9
1
1 1
2
and fiber bolts "3".
ENGINE