Fuel & Air

High-volume vertical check valve located in the QS3 for precise, consistent fuel metering Tunable leak jet maximizes volume of fuel and duration of squirt for all conditions Investment cast and finished to precise tolerances Improved low-end performance...

Without excess foam, floats maintain their position, keeping optimum air-fuel mixture that provides steady power over jumps and through whoops Special curved interior turns fuel in on itself, preventing internal splashing/foaming The solution to engine...

QuickShot's patent-pending design eliminates hesitation and bog on bikes and ATVs and provides instant response to throttle movements Additional benefits are reduced hot engine stalling and improved low end performance Bolt-on product for all Keihin FCR...

The latest carbon fiber technology with all the advantages of Boyesen's dual-stage reed design Responds quickly and accurately to changes in piston speed for smooth, dependable throttle response Offers the quickest acceleration any reed can offer;...

The latest carbon fiber technology with all the advantages of Boyesen's dual-stage reed design Responds quickly and accurately to changes in piston speed for smooth, dependable throttle response Offers the quickest acceleration any reed can offer;...

The latest carbon fiber technology with all the advantages of Boyesen's dual-stage reed design Responds quickly and accurately to changes in piston speed for smooth, dependable throttle response Offers the quickest acceleration any reed can offer;...

The latest carbon fiber technology with all the advantages of Boyesen's dual-stage reed design Responds quickly and accurately to changes in piston speed for smooth, dependable throttle response Offers the quickest acceleration any reed can offer;...

The latest carbon fiber technology with all the advantages of Boyesen's dual-stage reed design Responds quickly and accurately to changes in piston speed for smooth, dependable throttle response Offers the quickest acceleration any reed can offer;...

The latest carbon fiber technology with all the advantages of Boyesen's dual-stage reed design Responds quickly and accurately to changes in piston speed for smooth, dependable throttle response Offers the quickest acceleration any reed can offer;...

The latest carbon fiber technology with all the advantages of Boyesen's dual-stage reed design Responds quickly and accurately to changes in piston speed for smooth, dependable throttle response Offers the quickest acceleration any reed can offer;...

Respond quickly and accurately to piston speed changes for smooth, dependable throttle response High-tech carbon fiber with all the advantages of Boyesen's exclusive dual-stage reed design Offers the quickest acceleration any reed can offer; maximizes...

Respond quickly and accurately to piston speed changes for smooth, dependable throttle response High-tech carbon fiber with all the advantages of Boyesen's exclusive dual-stage reed design Offers the quickest acceleration any reed can offer; maximizes...