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:

KTM 400 SC Super Competition 1996, KTM 400 SX 2000, KTM 400 SX 2001, KTM 400 SX 2002, KTM 690 Enduro 2008, KTM 690 Enduro 2009, KTM 690 Enduro R 2010, KTM 690 Enduro R 2011, KTM 690 ENDURO R 2011