Up for sale is JT 1978-1979 DR370 Suzuki FRONT CS SPROCKET STEEL 15T-520 SUZ JTF434.15. The vendor part number is JTF434.15. 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 and three times over .