The wire harness of the scooter motorcycle is an important part of the motorcycle electrical system. It connects various electrical devices of the motorcycle, such as the engine controller, brake controller, instrument panel, lights, etc. The wire harness is composed of multiple wires, and each wire has a specific color and function.

The wire harness of the whole motorcycle is a complex and important system, which is like the "neural network" of the vehicle. This harness runs through the entire motorcycle, connecting various electrical components such as lights, instrument panels, horns, ignition systems, etc. together. It is not only responsible for the transmission and distribution of electric energy, but also undertakes the task of signal transmission to ensure the coordinated operation of various components. Whether the design of the whole vehicle harness is reasonable or not is directly related to the performance, reliability and safety of the motorcycle. At the same time, the quality of the harness will also affect the stability and durability of the vehicle's electrical system.

The motorcycle engine wiring harness refers to a set of wires and connectors that connect the motorcycle engine and its control module to other electrical devices (such as the ignition system, fuel injection system, sensors, etc.). It plays a crucial role in the motorcycle's electrical system, responsible for transmitting electricity and signals to control engine functions such as ignition, fuel supply, and emission control. Additionally, the engine wiring harness also conveys signals from sensors and controllers, enabling the engine management system to monitor and adjust the engine's operating status in real-time.
The motorcycle engine wiring harness typically consists of multiple wires of different colors and specifications, each with a specific function and purpose. The harness is usually located near the engine for easy connection to various electrical devices. To protect the wiring harness, some models are equipped with protective casings to prevent damage from moisture, dust, and wear.

The working principle is as follows:
Power supply voltage supply: One or more wires in the wire harness are responsible for transmitting the power supply voltage from the battery to the fuel injector, providing the required working voltage for the fuel injector.
Signal transmission: Sensors (such as the throttle position sensor, intake pressure sensor, etc.) convert the detected engine operating parameters into electrical signals and transmit them to the ECU through the wire harness. The ECU calculates the optimal injection timing and injection quantity based on these signals and transmits the control instructions to the fuel injector through the wire harness.
Fuel injector action: When the fuel injector receives the control instructions from the ECU, it will open or close the fuel injector according to the requirements of the instructions, thereby realizing the accurate injection of fuel.

The motorcycle EFI (Electronic Fuel Injection) wiring harness refers to a system that connects various electronic devices, sensors, actuators, and the ECU (Electronic Control Unit) on a motorcycle through electrical wires. Its primary function is to transmit electrical power and signals, ensuring that the EFI system can operate normally. In the EFI system, sensors are responsible for collecting various data, such as engine RPM, intake air volume, oil temperature, etc., and transmitting these data to the ECU through the wiring harness. The ECU analyzes and processes the received data, and then sends instructions to actuators, such as fuel injectors and ignition coils, to control key functions such as fuel injection and ignition of the engine.