KTM 350 LC4 (1994-1995). KTM 400 LC4 (1998-2001). KTM 500 LC4 (1991-1992). Model Number: JTF1902.15. KTM 620 LC4 EXC (1994-1997). KTM 620 LC4 SX (1997-1998). JT Drive sprockets are exclusively made from the finest Japanese ultra-durable high carbon C49 Steel or SCM415 Chromoly Steel Alloy.