4-pole rectifier coil charge controller, compatible with Yamaha YFZ450 (2004-2013) for ATV/UTV

【Specifically for the Yamaha YFZ450 High-Performance Quad】 This 4-pin voltage regulator (also called a rectifier) was specifically designed for the Yamaha YFZ450 High-Performance Quad and is compatible exclusively with models from model years 2004 to 2013. It serves solely for voltage regulation and is specifically designed for vehicles with fully electronic fuel injection or DC-CDI ignition systems. Rectification is performed internally by the ignition system. The 4-pin connector is characteristic of this system and ensures perfect compatibility with the vehicle's electrical system. It is an essential replacement part for resolving charging overvoltage issues. [Pure Voltage Regulation] The primary function of this product is pure voltage regulation: It monitors the system voltage and precisely limits the DC voltage, after rectification by the ignition system, to a safe range (approximately 13.5V – 14.5V). This system prevents voltage spikes by absorbing excess electrical energy (in the form of heat), thus protecting the battery, ECU (on fuel-injected models), instrument panel, lighting, and all other onboard electronic components from damage caused by overvoltage. [Optimized Design for High-Performance ATVs] Highly Efficient Heat Dissipation: The metal housing with large cooling fins is specifically designed to withstand the intense heat generated by high-revving engines and demanding off-road conditions, ensuring stable operation. Off-Road Durability: Thanks to excellent sealing, dust, shock, and corrosion resistance, it meets the demands of the YFZ450's challenging operating conditions. Precise 4-Pin Interface: The 4-pin connector is perfectly matched to the vehicle's original wiring harness, allowing for easy identification of its function (regulator only) and ensuring compatibility. [Fixes Common YFZ450 Overvoltage Issues] Replacing this component resolves the following problems: Frequent failure of headlights, taillights, and other bulbs (most common symptom). Unusually rapid battery discharge, swelling or damage to the battery electrolyte (due to continuous overcharging). Malfunction or damage to the instrument panel or other electronic equipment. Unusual headlight glare when switched on (overvoltage). [Easy Installation] Usually mounted in a well-ventilated area on the frame. Before installation, disconnect the negative battery terminal, unplug the old 4-pin regulator connector, remove the retaining clip, replace it with the new one, and then reconnect and secure it. Important Compatibility Information: Compatible Models and Years: Yamaha YFZ450 (2004–2013 models) Interface Type: 4-pin connector (important identifying feature)