Special Notes: Notes for Kit Item: Silver 51 Tooth Primary Drive Aluminum Rear Sprocket. You must use a tapered style sprocket bolt (part # 1096010001) for this sprocket to work on a Honda CRF300L. -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. - ORM O-Ring chain provides exceptional durability and long lasting characteristics making it perfect for motorcycles and ATVs. -Features solid bushings with pin material, O-rings and lubricant. -Unique chain design and profile ensures durability and decreases wear on chain guides and swingarm friction plates. -Average tensile strength 7,850 lbs. -Master-Link style clip included.