Order Includes: 1 x Rear Sprocket. Compatible with Yamaha Models: YZF-R1 1998-2003 , YZF-R7 1999. Part Numbers: 4XV-25443-21-00 4XV-25443-20-00 4XV254432100 4XV254432000. We strongly suggest comparing the posted picture to the unit(s) that needs to be replaced..
