Order includes: 1x Rear Sprocket 45 Teeth. Material: C49 High Carbon Steel. Compatible with Yamaha models: R1 YZF-R1 2004-2005 / R1 YZF-R1 2006-2008 / R1 YZF-R1 SP 2006. Part Number: 14B-25447-20-00. We strongly suggest comparing the posted picture to the unit(s) that needs to be replaced..
