Vortex 435S-48 Black 48-Tooth 520-Pitch Steel Rear Sprocket Fits: 1999 yamaha yzf-r7, vortex steel spkt - 435s-48 520 rear sprocket - steel - black - 48t Vortex steel spkt - 435s-48 Manufacturer: vortex Photos are for reference only, please read title and product description carefully.