GY6 Engine Gear Sets

Performance Gear Sets in a wide variety of prepackaged gear ratios for 150cc and 125cc GY6 4-stroke engines commonly found on Full-Size Street Scooters and Off-Road Vehicles. Choose from 14, 16, 17 or 18 Front Tooth combinations and 35, 36, 37, or 38 Rear Tooth combinations. Please see our Warranty & Returns Policy. Small Gear Overall Length: 60.5mm Large Gear Number of Splines: 19 Inner Diameter (splines peak to peak): 18mm Thickness: 20mm*Recommended For Use With A Big Bore Kit*