ZETA Chain Guide ze82-1412 F6414 ZETA ZETA chain guide F6414. 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 350 Gas Gas ES 500 Gas Gas EX 250 Gas Gas EX 250 F Gas Gas EX 300