4-Pin Voltage Regulator for GY6 150 cc 200cc 250cc ATVs Dirt Bikes Go Karts Dune Buggys Pit Bike Quad 4 Wheeler 4-Pin Voltage Regulator. Top Quality Guaranteed. 4-Pin Voltage Regulator for GY6 150-250cc ATVs, Dirt Bikes, Go Karts 4 Pin female plug Bolt Hole Spacing: 2.15"