ZETA Throttle Tube ze45-8014 F5146 ZETA ZETA throttle tube F5146. See if it fits your bike. Suzuki RMZ 250 Suzuki RMZ 450 Yamaha WR 250 F Yamaha WR 400 F Yamaha WR 450 F Yamaha YZ 250 F Yamaha YZ 250 FX Yamaha YZ 450 FX