Yamaha YZ450F 2020 Owner's Service Manual page 73

1. Clamp
2. Diode
3. Throttle position sensor lead
4. Intake air pressure sensor lead
5. Joint coupler
6. Intake air pressure sensor coupler (dark blue,
3-pin)
7. Clamp (wire harness)
8. Wire harness
9. Fuel injector lead
10.Throttle body
11.Fuel injector coupler (gray, 2-pin)
12.Fuel hose
13.Air filter assembly
14.Sub-lead wire
15.Fuel tank bracket
16.Plug cap
17.Cylinder head cover
18.Starter motor lead
19.Cable guide
20.Ignition coil
21.Side core
22.Sub-lead wire
23.Sub-lead wire coupler (black, 2-pin)
24.Launch control switch lead (wire harness)
25.Launch control switch coupler
26.Rectifier/regulator lead (wire harness)
27.Launch control switch lead
28.Grommet
29.ECU
30.High tension cord
A. Fasten the main harness and start switch
lead using the clamp, and insert the clamp
projection into the hole in the sheet metal of
the radiator. 
The direction of the clamp lock portion does
not matter. When assembling, it is allowed to
run the leads near the radiator cap on the
inside.
B. No pinch is allowed the leads between the
tank rail and the air filter joint.
C. Insert the projection of the main harness into
the hole in the frame.
D. To sub-lead 2-pin coupler (black)
E. Right side of the vehicle.
F. ±10
G. Install the plug cap so it faces to the right side
of the vehicle.
H. Route the starter motor lead along the
damper and clamp it.
I. Face the flange of the collar toward the bolt
head and install it.
J. It does not matter if the high tension cord and
grommet do not contact the ECU.
K. Pass the sub-lead wire between the ECU and
air filter assembly.
CABLE ROUTING DIAGRAM
L. Insert the clamp into the rib so that it contacts
the rib.
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