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Fitment: 




  • KXF250 04-24, KXF450 06-23, KLX450R 08-14


  • RMZ250 04-25, RMZ450 05-25, RMX450 12-17


  • YZF250 01-25, YZF400/426/450 98-25, WRF250 01-25, WRF400/426/450 98-25


RFX Sport Series Throttle Tubes are an exact replacement part at a fraction of the cost of genuine parts. They are made from a Teflon coated Nylon Fabric which provide you with a smooth action.




  • Replacement throttle tubes for all popular off road bikes.


  • Open end design for use with aluminium hand guards if required. 


  • Uses the same cam profile as the OEM part for proper throttle control.


  • Teflon coated Nylon Fabric provides smooth action.


  • Will not scar bars like aluminium tubes.


Fitting Instructions:




  • Slide the rubber boot down and disassemble the throttle housing, remove the old throttle tube taking care not to damage the throttle cables.


  • Carefully remove grip from the old throttle tube if required.


  • Inspect the cables and housing for excess damage or wear, clean and lube them or replace if required.


  • Clean the handlebar and inspect for damage where the old throttle tube has been spinning on the bar if a ridge is present replace the handlebars.


  • Slide the new throttle tube on the handlebar and lube using a penetrating lubricant preferably Maxima MPPL (do not use grease as this attracts dirt and makes the throttle stick after a short period of time).


  • Re-assemble the throttle cables and housing again using some penetrating lubricant.


  • Tighten the throttle housing in the correct position on the handlebars.


  • Adjust the cable to the required (free play amount) of your liking. 


  • Rotate the handlebars to their maximum position to check proper operation of the throttle and correct cable routing, some re-adjustment of the cable may be required.


  • Slide the rubber boot back over the housing.


  • Cover the hole in the end of the grip with some electrical tape (To stop glue entering the throttle barrel) and apply a small amount of RFX grip glue to the outer end of the throttle tube on the outside diameter.


  • Apply a small amount of RFX grip glue to the inside of the new grip and slide onto the tube.


  • Twist the grip to the correct position and leave to dry.


  • Apply RFX safety grip wire if needed.


  • After the glue has dried again check proper operation of the throttle.   

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