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Boyesen FCR Quick Start KTM MX/Offroad/ATV

Hot Engine Kick Starting is no longer a problem. Try the most effective way to add performance to your Keihin FCR carburetor.

  • Integrated Hot Start Assist eliminates problem 4-stroke hot start procedure
  • Tunable leak jet maximizes volume of fuel and duration of fuel spray for all conditions
  • 25% more fuel capacity
  • High volume vertical check valve located in the QS3 for precise, consistent fuel metering
  • Patented design stops bogging and improves throttle response
  • Improved low end performance
  • Investment cast and finished to precise tolerances
  • Simple bolt-on for any current kick start model

Application Note: Older models with carburetor mounted Hot Start knobs and Electric Start models will require a separate OEM or aftermarket handlebar mounted Hot Start Lever.



  • Fits ALL Keihin FCR-equipped MX/Off-road and ATV models.



This product can expose you to chemicals known to the State of California known to cause Cancer or birth defects and reproductive harm. For more information go to: https://oehha.ca.gov/proposition-65

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