Jt 51 Tooth Rear Sprocket with Keepitroostin Sticker Fits Yamaha Yz125 Yz250 1987-1998 Fits Yamaha Yz125 Yz250 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 JT Sprockets are made from the latest generation of computer design and control metal cutting equipment for maximum durability Replace OEM parts at a fraction of the price JT rear sprockets are made from the finest C45 high carbon steel, 7075 aluminum, or new titanal alloy Includes Keepitroostin Sticker All sprockets are heat-treated and hand-finished to meet or exceed the highest possible quality standards possible quality standards