JT Steel Sprockets are the OEM quality choice, manufactured using only the finest grade of C49 high carbon steel for the rear sprockets, and SCM420 chromoly steel alloy for the front sprockets.
Fits:

Yamaha WR500Z ZD 1992, Yamaha XT250 1995, Yamaha XT250 1996, Yamaha XT250 1997, Yamaha XT250 1998, Yamaha XT250 1999, Yamaha XT250 2000, Yamaha XT250 2001, Yamaha XT250 2002, Yamaha XT250 2003, Yamaha XT250 2004, Yamaha XT250 Serow 2005, Yamaha XT250 Serow 2006