Specification: Color: Dark Gray Material: Stainless Steel Tooth Number: 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 Tooth Shaft: 14mm/17mm 17mm/20mm Eye to eye: 30mm/33mm Placement: Front Fitment: Fits 420 10/11/12/13/14/15/16/17/18/19 tooth counter sprocket for many Chinese pit bikes and atvs like 70cc, 110cc and 125cc for 50cc 70cc 90cc 110cc Scooter Motorcycle Bike ATV Quad Go Kart Moped This part may also fit on 50 - 125cc dirtbike, go-karts and ATV. This part will fit almost all of the ATV brands from China. Such as TaoTao, Buyang, Coolsport, Kazuma, Sunl, ROKETA, AIM-EX etc. Notice : 420 20mm 10T 11T 12T and 420 17mm 10T 11T will haven't Screw Holes Description The 420 front engine sprocket will be fit for the dirt bike,monkey bike ATV,go kart and so on. If the diameter of the center hole is 17mm ，the distance between two holes will be 30mm. If the diameter of the center hole is 20mm ，the distance between two holes will be 33mm. Package: 1pcs Front Sprocket+accessories Note: 1 No Instructions Included ,Professional Installation Is Highly Recommended !!!! 2.Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) 3.We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need. 4.The color of the actual items may slightly different from the listing images due to different computer screen, thanks for your understanding. 5.please note The Compatibility Is Just For Reference. Please Compare With Your Original One Before Purchasing! and we advise buyer check original size than compare with our item size before Purchasing .