Supersprox Steel Rear Sprocket - 39 Tooth Rfe-451-39-Blk

Gives you longer system life without compromising weightSteel teeth last 4 times longer than aluminumPound-for-pound, the strongest sprocket on the marketThe aluminum core is 70% lighter than...

Supersprox Steel Rear Sprocket - 40 Tooth Rfe-853-40-Blk Yamaha -- YZ 250 -- (1980); Yamaha -- YZ 125 -- (1980, 1984, 1985, 1986, 1981, 1994, 1995, 1996, 1983, 1987, 1989, 1997, 1998, 1988, 1991,...