Special Notes: Notes for Kit Item: Primary Drive Rear Aluminum Sprocket, 49 Tooth Black You must use a tapered style sprocket bolt (part #1096010001) for this sprocket to work on a Honda CRF300L. - Aluminum rear sprocket made from heat-treated 7075 T-6 aluminum. - Comes with self-cleaning grooves. - Everything matches original equipment exactly for a perfect fit and size. - ORH Gold X-ring chain is the ultimate off-road chain for performance and durability. Features gold plating on the chainrings. - The X-ring shape provides an exceptional seal with reduced friction. -8,120 lbs tensile strength. - Kit includes layshaft spacer.