Renthal Honda Factory Kit K018 13T Front 53T Rear 520 Sprocket Chain Kit CR CRFRenthal Honda Factory Kit K018 13T Front 53T Rear 520 Sprocket Chain Kit CR CRF This is a brand new, genuine Renthal Honda Factory Kit, identification number K018. This kit provides a complete front and rear sprocket replacement set designed for high performance off road use. The rear sprocket is an ultralight aluminum design, while the front is durable steel. Product Details: Brand: Renthal Kit Part Number: K018 (Internal kit ID) Rear Sprocket: 53