5-pin voltage regulator and rectifier compatible with Yamaha YZF-R6 (1999-2002) / YZF-R1 (RN01, 1998-1999), original factory code 4JH-81960-00, charging regulator.

High-performance rectifier for Yamaha R-Series (1st generation): This high-performance 5-pin voltage regulator/rectifier was specifically designed for the Yamaha YZF-R6 (1st generation) and YZF-R1 (1st generation, model RN01). It is compatible with the following models and years: YZF-R6 (1999, 2000, 2001, 2002) and YZF-R1 RN01 (1998, 1999). The corresponding OEM part number is 4JH-81960-00. Manufactured to the stringent electrical standards of early R-Series race motorcycles and featuring a unique 5-pin interface, it ensures perfect compatibility with the three-phase ignition and battery. It is a precise and reliable solution for resolving charging issues and replacing worn OEM parts. 【Highly Efficient Three-Phase Rectification and Precise Voltage Regulation】

Highly efficient rectification: The three-phase alternating current (AC) generated by the magneto is converted into direct current (DC) with minimal loss and a consistent output. This ensures sufficient power for the electronic fuel injection system, digital instrument cluster, and high-performance lighting of the high-revving four-cylinder engine during sporty driving.

Precise voltage regulation: Thanks to a control circuit optimized for older electronic fuel injection systems, the system voltage is precisely stabilized within the ideal range of approximately 13.8 V to 14.4 V across the entire engine speed range and under dynamic load. This effectively prevents overcharging or over-discharging of the battery, thus protecting the engine control unit (ECU) and the sensitive original sensors. 【Competition-Level Cooling and Reliability】

Extreme Cooling Design: The housing, made of highly thermally conductive die-cast aluminum with optimized cooling fins, ensures high airflow. Forced air cooling guarantees rapid heat dissipation during track driving or high-speed operation, ensuring a continuous and stable power supply. High Environmental Resistance: Excellent water and dust resistance, vibration resistance, and high-temperature resistance. Precise 5-Pin Interface: The unique 5-pin connector is 100% compatible with your vehicle's original wiring harness, allowing for quick and easy installation. Please ensure your vehicle's original rectifier has a 5-pin interface. [Fixes Charging Issues in Older R-Series Models] Replacing this component can prevent or resolve the following issues: unusual battery wear or insufficient charging after sporty driving; signs of voltage instability under high load, such as... B. Flickering of the dashboard lights or reduced sensitivity of the electronic control system; a battery in suboptimal condition due to reduced charging efficiency. [Recommendations for professional installation] It is recommended that installation be performed by an experienced technician. The component is typically mounted on the side of the frame or in the rear ventilation area. The negative terminal of the battery must be disconnected before use. Compatible models: Yamaha YZF-R6 (1999–2002) and Yamaha YZF-R1 (model RN01) (1998–1999).