Available for ALL Keihin FCR-equipped MX. Off-road and ATV models. The Patented performance of the proven Boyesen QuickShot system, now with adjustable leak jet and hot start assist integration! A serious step towards achieving EFI levels of performance.

Try the most effective way to add performance to your Keihin FCR carburator.

• 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
• Fits ALL Keihin FCR carbs
• Simple bolt-on