Brand new 12V 4-Pin FULL WAVE Voltage Regulator. This voltage regulator fits most Scooters/Mopeds with 50cc to150cc motors and should fit many other models of Asian ATVs, Scooter, Go-Karts, Dirt Bikes, and Motorcycle Dual-silicon Full-wave voltage regulator, made of dual-silicon wafers. It has better performance than single-silicon voltage regulator. Charging more smoothly can protect battery better. 4 pins male plug