ZETA Fork Bottom Adjuster F4240 Black and Red ZETA ZETA fork bottom adjuster F4240. See if it fits your bike. Gas Gas EC 250 Gas Gas EC 300 Gas Gas GP 250 Gas Gas GP 300 Gas Gas XC 250 Gas Gas XC 300 Honda CRF 250 R Honda CRF 250 RX Honda CRF 450 L Honda CRF 450 R Honda CRF 450 RL Honda CRF 450 RX