DRC Rear Sprocket 520 D34-75-048 Aluminium DRC DRC rear sprocket D34-75-048. See if it fits your bike. Gas Gas EC 125 Gas Gas EC 250 Gas Gas EC 250 F Gas Gas EC 300 Gas Gas EC 350 F Gas Gas EC 450 F Gas Gas EC 500 F Gas Gas ES 700 Gas Gas EX 250 Gas Gas EX 250 F Gas Gas EX 300 Gas Gas EX 350 F