Checking The Throttle Body Joint; Checking The Breather Hoses - Yamaha YZ450F Owner's Service Manual

3. Wash:
• Air filter element
EWA
WARNING
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.
ECA
NOTICE
Do not twist the element when squeezing
the element.
4. Check:
• Air filter element
Damage  Replace.
5. Foam-air-filter oil or equivalent oil to the ele-
ment
Oil application quantify
50 g
TIP
Squeeze out the excess oil. Element should be
wet but not dripping.
6. Install:
• Air filter guide "1" (to the air filter element)
• Air filter element "2"
• Air filter mounting bolt "3"
Air filter mounting bolt
2.0 Nm (0.20 m·kgf, 1.4 ft·lbf)
3
1
2
7. Install:
• Air filter case cover "1"
TIP
Align the air filter case cover groove "a" with the
air filter case edge "b".
8. Install:
• Fuel tank cap cover

CHECKING THE THROTTLE BODY JOINT

EASB111080
1. Check:
• Throttle body joint
Refer to "CHECKING THE THROTTLE
BODY JOINT" on page 7-8.

CHECKING THE BREATHER HOSES

EASB111081
1. Check:
• Breather hose "1"
Crack/damage  Replace.
Loose connection  Connect properly.
ECA14920
NOTICE
Make sure the cylinder head breather hose
is routed correctly.
3-13
ENGINE
1
3
2
1
a
b
1