Yamaha YZ450FX 2019, Owner'S Service Manual

Page: 99 / 388

ENGINE
3-11
•
Guide “3” (from the air filter element)
• Seal “4” (from the air filter element)
4. Wash:
• Air filter element
WARNING
EWA19110
Do not use gasoline or organic (acid/alka-
line) volatile oil for washing.
TIP
After washing the element with air filter cleaner
or kerosene, squeeze and dry it completely.
NOTICE
ECA24280
Do not twist the element when squeezing the
element.
5. Check:
•
Air filter element
Damage

Replace.
6. Apply:
Yamaha foam air filter oil or other quality
foam air filter oil.
TIP
Squeeze out the excess oil. Element should be
wet but not dripping.
7. Install:
• Seal “1” (to the air filter element)
•
Guide “2” (to the air filter element)
•
Air filter element “3” (to the air filter guide)
• Air filter guide “4”
TIP
•
Apply lithium soap-based grease on the entire
seal lips when installing the air filter guide.
•
Make sure that the two projections “a” at the
rear side of the vehicle on the air filter guide are
securely fitted into the two slots “b” in the air fil-
ter case.
•
Check that the air filter element is turned up be-
tween the air filter guide and air filter case and
that there is no gap.
Gap

Reinstall.
8. Turn the plates “1” to the original position.
9. Install:
• Air filter case cover “1”
•
Fuel tank breather hose
(to the air filter case cover)
TIP
•
Make sure that the two slots “a” at the rear side
of the vehicle in the air filter case cover are se-
curely fitted into the two edges “b” on the air fil-
Oil application quantify
30 cm³
3
1
2
4
2
3
a
b b
4
1
1
a
b
1 1