Compatible with Yamaha WR250F/WR450F/WR450 motorcycle rectifier and regulator (2007 model), original factory code 5UM-81960-E0, charging regulator.

Manufacturer part number: 5UM-81960-E0. This component was manufactured in strict compliance with extreme off-road conditions and original vehicle parameters, ensuring perfect compatibility with three-phase ignition and battery. It is an essential replacement part that guarantees the stable operation of the charging system even under the harshest conditions.

【High-Performance Three-Phase Rectification and Voltage Regulation】 This component forms the heart of the charging system for high-performance off-road motorcycles and performs the following key functions:

Rectification: Efficiently converts the three-phase alternating current (AC) generated by the magneto into direct current (DC) to charge the battery and power all of the vehicle's electrical components.

Voltage Regulation: Precisely regulates the output voltage and stabilizes it within a safe range of approximately 13.8V to 14.5V. This prevents overcharging or deep discharging of the battery during significant fluctuations in engine speed and protects the ECU, instruments, and battery.

【Optimal Heat Dissipation and Durability for Off-Road Use】

Maximum Heat Dissipation: Robust die-cast aluminum housing with large, dense cooling fins.

Forced air cooling: Air circulation during riding and heat dissipation via the frame minimizes the heat generated under high load. Heat is dissipated quickly. This ensures continuous and stable operation on slow inclines or in high-temperature environments. Excellent environmental resistance: The component is highly resistant to impacts, splashing water, mud, and corrosion, and has been specially reinforced for extreme off-road environments such as forest tracks and deserts. Quick and easy installation: The connector is perfectly matched to the vehicle's original wiring harness, allowing for easy and reliable installation without any modifications to the wiring. 【Solves Off-Road Charging Problems】 Replacing this component helps resolve the following common problems in off-road vehicles: Deeply discharged battery after long journeys or in rough terrain, starting problems, or poor lighting. Unusual battery wear or damage (mainly due to vibrations off-road and improper charging). Unstable voltage while driving can lead to malfunctions of the engine control unit, misfires, or instrument panel failures. Headlight brightness fluctuates significantly depending on acceleration.