4-Pin Voltage Regulator Rectifier for 50 cc 70cc 90 cc 110cc 125 cc ATVs Go Karts Dune Buggy Sandrail Quad 4 Wheelers Taotao SunL Coolster 4-Pin Voltage Regulator. Top Quality Guaranteed. 4-Pin Voltage Regulator for 50-125cc ATVs & Go Karts Dual-silicon half-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;