Checking The Throttle Body Joint; Checking The Fuel Line - Yamaha YZ450FX 2021 Owner's Service Manual

1
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.
4
3
a
1
2
b b
a
b
1 1
3-17
1
c
d
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
Refer to "FUEL TANK" on page 7-1.
2. Check:
• Fuel hose "1"
Crack/damage  Replace.
Loose connection  Connect properly.
ENGINE
a
b
1
1