This ATV, dirt bike, and scooter rectifier (voltage regulator) has 4 active pins as shown in the image Compatible with a variety of engines sizes, ranging from 50cc – 250cc, including many models of 50cc, 125cc, 150cc, 200cc, and 250cc Chinese made engines 30 Day Warranty Description This ATV, dirt bike, and scooter rectifier (voltage regulator) has 4 active pins as shown in the image. Compatible with a variety of engines sizes, ranging from 50cc – 250cc, including many models of 50cc, 125cc, 150cc, 200cc, and 250cc Chinese made engines. Note that some engines will require the male pin connector and some will require the female pin connector. Simply cut and splice your wires for the proper fit. Specifications Wires: 4 wire Pins 4 pin