Up for sale is JT 1976 CB750A Automatic Honda REAR SPROCKET STEEL 39T-530 HON JTR284.39. The vendor part number is JTR284.39. 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 .