Special Notes: Notes for Kit Item: 49 Tooth Silver Primary Drive Aluminum Rear Sprocket. You must use a tapered style sprocket bolt (part # 1096010001) for this sprocket to work on a Yamaha WR250R. -Rear aluminum sprocket made from 7075 T-6 heat treated aluminum. - Comes with self cleaning grooves. - All match original equipment exactly for perfect fit and size. - High quality 520 racing chain. - Features gold plating on the plates. -Average tensile strength 8,900 lbs. -Master Link included.
