DRC Front Sprocket 520 D331-D6156 Steel for Yamaha DRC DRC front sprocket steel D331-D6156. See if it fits your bike. Yamaha WR 250 F Yamaha WR 250 R Yamaha WR 250 X Yamaha YZ 125 Yamaha YZ 125 X Yamaha YZ 250 F Yamaha YZ 250 FX