This Rectifier (Voltage Regulator) applies to (and is not limited to) 49cc, 50cc, 70cc, 90cc, 110cc, 125cc, 140cc, 150cc engines. It is most commonly used for 110cc and 125cc ATVs as well as many smaller displacements of scooters, dirt bikes and go-karts / buggies. This part has a male connector with 4 pin configuration. Casing is 3.9cm x 3.5cm x 2.1 cm. Plug is 2.3cm x 1.5 cm.