Yamaha YZ 2020 Series, Owner'S Service Manual, Page: 93 / 376

ENGINE
3-17
•
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-
ter case.
•
Be sure to carefully align the two ribs “c” locat-
ed on the left and right sides of the air filter
case cover with the projections “d” on the air
scoop, and then install the air filter case cover.
10.Install:
• Fuel tank cap cover
EAM30335
CHECKING THE THROTTLE BODY JOINT
1. Check:
• Throttle body joint “1”
Crack/damage

Replace.
EAM30222
CHECKING THE FUEL LINE
1. Remove:
• Seat
•
Side cover (left/right)
• Air scoop (left/right)
Refer to “GENERAL CHASSIS” on page 4-1.
• Fuel tank
2
3
a
b b
4
1
1
a
b
1 1
a
b
1
1
c
d
1