ZETA Throttle Tube ze45-8016 F5148 for Honda ZETA ZETA throttle tube F5148. See if it fits your bike. Honda CRF 250 R Honda CRF 250 RX Honda CRF 450 L Honda CRF 450 R Honda CRF 450 RL Honda CRF 450 RX Honda CRF 450 X