Yamaha YZ450FN 2022 Owner's Service Manual page 63

1. Clutch cable
2. Throttle cable (return)
3. Throttle cable (pull)
4. Cable holder
5. Launch control switch lead
6. Intake air temperature sensor coupler (black,
2-pin)
7. Launch control switch coupler (black, 4-pin)
8. Rectifier/regulator coupler
9. Stator coil assembly lead
10.Battery band
11.CCU (Communication Control Unit)
12.Starter motor lead
13.Gear position switch lead
14.Lower engine bracket
15.Radiator hose
16.Gear position switch coupler (white, 3-pin)
17.Stator coil assembly coupler (gray, 2-pin)
18.Tension arm
19.Rectifier/regulator lead
20.Wire harness
21.Yamaha diagnostic tool coupler
22.Tank rail
23.Engine stop switch lead
24.Mode switch lead
25.Rectifier/regulator
26.Radiator
27.Cylinder head breather hose
28.Radiator breather hose
29.Crankcase cover
30.Crankcase
31.Clamp
32.Frame
33.Plate
A. Pass the engine stop switch lead and the
mode switch lead between the frame and the
cable holder. Route engine stop switch lead
and the mode switch lead above of the vehi-
cle. Pass the mode switch lead above the
engine stop switch lead.
B. Insert the Yamaha diagnostic tool 3-pin cou-
pler (black) into the connector, and secure it
to the bracket.
C. Insert the engine stop switch 2-pin coupler
(red) into the inside of the bracket, and
secure it.
Insert the mode switch 4-pin coupler (black)
into the outside of the bracket, and secure it.
Pass the mode switch lead under the bracket.
D. Pass the launch control switch lead through
the inside of the air filter case and intake air
temperature sensor.
E. Insert the launch control switch 4-pin coupler
(black) into the bracket and secure it.
CABLE ROUTING DIAGRAM
F. Insert the rectifier/regulator 2-pin coupler (not
colored) and rectifier/regulator 3-pin coupler
(not colored) into the bracket and secure
them.
After securing, install the cover over them.
G. Pass the stator coil assembly lead behind the
radiator.
Be sure the lead will not be pinched between
the radiator and the tension arm.
H. Fasten the starter motor lead to the bracket
using the plastic locking tie. Position the lock
part of the plastic locking tie to rear side of
the vehicle. Cut the end of the plastic locking
tie.
I. Route the starter motor lead along the cylin-
der body without slack.
J. Route the gear position switch lead along the
crankcase without slack.
K. Pass the gear position switch lead to the
inside of the front engine bracket (the side of
the vehicle).
L. Pass the clutch cable with no downward sag
allowed.
M. Bring the protector of the clutch cable into
contact with the radiator hose, and pass it to
the outside of the gear position switch lead
and the stator coil assembly lead (the outside
of the vehicle).
N. No pinch is allowed the leads between the
radiator and the tension arm.
O. After connecting the gear position switch 3-
pin coupler, attach the coupler cover.
P. After connecting the stator coil assembly cou-
pler, attach the coupler cover.
Q. Pass the rectifier/regulator lead (wire harness
side) to the inside of the tension arm (the side
of the vehicle).
R. Pass the main harness to the front of the radi-
ator breather hose (the front of the vehicle),
and to the inside of the throttle cable (the side
of the vehicle).
S. Pass the engine stop switch lead between the
Yamaha diagnostic tool coupler and the tank
rail.
T. Pass the launch control switch lead under the
mode switch lead.
U. Pass the cylinder head breather hose
between the down tube and radiator, and
front of the radiator under boss.
V. Pass the radiator breather hose through the
down tube.
W. Clamp the clutch cable at the front of the lead
(the front of the vehicle).
X. The routing order of the gear position switch
lead and stator coil assembly lead does not
matter.
Y. Insert the clip portion of the clamp into the
frame.
The lock part should face toward the front of
the vehicle.
Cut off the end of the remaining portion.
Z. Diagram for routing the radiator hose, cylin-
der head breather hose, and radiator
breather hose.
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