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:

Honda CRF100F 2004, Honda CRF100F 2005, Honda CRF100F 2006, Honda CRF100F 2007, Honda CRF100F 2008, Honda CRF100F 2009, Honda CRF100F 2010, Honda XR100R 1985, Honda XR100R 1986, Honda XR100R 1987, Honda XR100R 1988, Honda XR100R 1989, Honda XR100R 1990, Honda XR100R 1991, Honda XR100R 1992, Honda XR100R 1993, Honda XR100R 1994, Honda XR100R 1995, Honda XR100R 1996, Honda XR100R 1997, Honda XR100R 1998, Honda XR100R 1999, Honda XR100R 2000, Honda XR100R 2001, Honda XR100R 2002, Honda XR100R 2003