ZETA Throttle Tube ze45-8121 F5173 ZETA ZETA throttle tube F5173. See if it fits your bike. Husqvarna FC 250 Husqvarna FC 350 Husqvarna FC 450 Husqvarna FE 250 Husqvarna FE 350 Husqvarna FE 450 Husqvarna FE 501 KTM EXC 450 KTM EXC 500 KTM EXC-F 250 KTM EXC-F 350 KTM Freeride 350