Up for sale is JT 1973-1974 TX500 Yamaha REAR SPROCKET STEEL 34T-530 YAM JTR850.34. The vendor part number is JTR850.34. 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 .