Yamaha YZ450FX 2021 Owner's Service Manual page 297

SIGNALING SYSTEM
4. Joint connector
5. Main relay
7. Battery
8. Frame ground
9. Main fuse
15.Warning light
16.Fuel level warning light
18.Resistor
20.ECU (Engine Control Unit)
24.Fuel sender
A. Battery sub-lead
B. Wire harness
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