Yamaha YZ450FX 2023, Owner'S Manual

Page: 60 / 164

ENGINE
3-12
2. Tighten:
•
Locknut
EAM30219
CLEANING THE AIR FILTER ELEMENT
1. Remove:
• Fuel tank cap cover “1”
Refer to “FUEL TANK CAP” on page 1-14.
• Air filter case cover “2”
TIP
•
Loosen the quick fastener screw “3” and re-
move the air filter case cover.
•
Remove the two ribs “a” located on the left and
right sides of the projections “b” on the air
scoop, and slide the air filter case cover toward
the front of the vehicle to remove it.
2. Turn the plates “1” in direction “a”.
3. Remove:
•
Air filter guide “1”
• Air filter element “2” (from the air filter guide)
•
Guide “3” (from the air filter element)
• Seal “4” (from the air filter element)
4. Wash:
• Air filter element
a. After washing the element with air filter
cleaner or kerosene, squeeze and dry it
completely.
WARNING
EWA19110
Do not use gasoline or organic (acid/alka-
line) volatile oil for washing.
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
a. Put the air filter element into a plastic bag
and drip the filter oil into the bag.
b. With the element inside the bag, rub it
thoroughly so that the element is evenly
permeated with the oil.
c. Wrap the element in a clean cloth, rub the
element gently, and wipe off any excess
oil.
TIP
•
The element should be permeated with oil so
that it is wet but not dripping.
•
When replacing the element, permeate the el-
ement in oil by using the same procedure as
when cleaning.
Locknut (clutch lever position)
4.8 N·m (0.48 kgf·m, 3.5 lb·ft)
1
2
a
T
R
.
.
1
2
3
a
b
1 1
a a
a a
3
1
2
4