Up for sale is JT 2004-2008 FZS600 FZ6 Yamaha REAR SPROCKET STEEL 44T-520 KAW/SUZ/YAM JTR486.44. The vendor part number is JTR486.44. Please read the title to know what is for sale. Catalog Description� TOP QUALITY AT ECONOMICAL PRICES Made exclusively from the finest Japanese 545C high carbon steel Heat treated and hand finished to meet or exceed O.E.M. standards Outlasts any mild steel or surface hardened sprocket as much as two or three times over .