BOYESEN

BOYESEN DIRT BIKE PRO SERIES REEDS.Pro series dual-stage reeds combine a carbon-fiber top reed with a fiberglass bottom reed for unrivaled performance.The Pro Series are more responsive than our...

Dual stage reedsMinor change gives major H.P. improvementsFaster opening and closingGreater low-pressure (Low-throttle) responseGreater velocityGreater flow areaLonger overall lifeNo engine damage if...

The latest carbon fiber technology with all the advantages of Boyesen's patented dual-stage reed designUtilizes a carbon fiber top reed and a durable fiberglass/epoxy bottom reedOffers the quickest...

The latest carbon fiber technology with all the advantages of Boyesens patented dual-stage reed designUtilizes a carbon fiber top reed and a durable fiberglass/epoxy bottom reedOffers the quickest...

The latest carbon fiber technology with all the advantages of Boyesens patented dual-stage reed designUtilizes a carbon fiber top reed and a durable fiberglass/epoxy bottom reedOffers the quickest...

Available for ALL Keihin FCR-equipped MX/Off-road and ATV models.Try the most effective way to add performance to your Keihin FCR carburator. Integrated Hot Start Assist eliminates problem...

Boyesen Engineering has now introduced the NEW QuickShot 3. This bolt-on performance accelerator pump cover eliminates bog, improves throttle response and offers hassle free leak jet circuit tuning...

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...

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...

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...

High-volume vertical check valve located in the QS3 for precise, consistent fuel metering Tunable leak jet maximizes volume of fuel and duration of fuel spray for all conditions Integrated Hot Start...

One piece designEasy installationThe intake charge is redirected for more even distribution to the intake portsConstant flow velocity is maintained for instant throttle response and more horse power