Boyesen Engineering

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ELIMINATE BOG AND IMPROVE RESPONSE WITH HASSLE FREE LEAK JET CIRCUIT TUNING. Available for all Keihin FCR carbureted MX, Off-road and ATV models. This patented 3rd generation Quickshot combines an innovative triple effect to; completely fill the pump chamber with fuel, eliminate all trapped air from the system and provide and adjustable leak jet circuit for quick hand tuning. Together with with the Boyesen unconditional guarantee, the QS3 simply delivers unmatched results.

  • Tunable leak jet circuit maximizes volume of fuel and duration of fuel spray for any condition
  • Investment cast and finished to precise tolerances
  • Stops hesitation and bog
  • Instant throttle response
  • Improves low end performance
  • Fits ALL Keihin FCR carbs
  • Simple bolt-on

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