37T/17T 420 Sprocket Set for 50cc-125cc Bikes

1 Wide Application: The 420 chain front rear sprocket kit is specially designed to fit 50cc to 125cc dirt bikes, mini bikes, ATVs and 4 wheel go karts. 2 Sprocket Size: This sprocket drive gear is 0.235in thick and has 17T. Center mounting holes are 1.18in apart and are compatible with 17mm engine countershafts. 3 Heat Treatment: To make the sprocket stronger, the sprockets are heat treated, which increases the strength of the sprocket, making it resistant to wear and tear very well. 4 Gear Curve Design: The sprockets also have an upgraded gear curve that helps reduce transmission friction, which helps extend the life of the chain. 5 Ideal Replacement: This kit is designed to replace the old one in different power sport vehicles using 420 chain sizes. The front sprocket is supplied with mounting screws.Item Type: 420 Chain Sprocket KitMaterial: 45 Steel + Steel AlloyRear Sprocket: 420 37T 155mmFront Sprocket: 420 17T 73mmApplication: Complete chain and sprocket set designed to replace old damaged chain and sprocket sets from originals to get your riding going again.Fitment: Fit for 50, 70, 90, 110, 125cc Dirt Pit Bike and Mini Bikes, ATVs, Go Kart Replacement for Coolster Replacement for Apollo Replacement for SSR and more

What's in the box
1 x 420 Chain
1 x 155mm Front Sprocket
1 x 420 Rear Sprocket
1 x Fixing Plate
2 x Screw