Yamaha YZ450FX 2019 Owner's Service Manual page 349

ELECTRICAL COMPONENTS
1. Intake air pressure sensor
2. Throttle position sensor
3. Injector
4. Ignition coil
5. ECU (Engine Control Unit)
6. CCU (Communication Control Unit)
7. Starter relay
8. Main fuse
9. Battery
10.Gear position switch
11.Fuel pump
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