Boyesen Reeds & Reed Valves
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Why Boyesen Dominates the Reed Valve Category
Boyesen has been engineering reed induction solutions since 1972, and nowhere is that expertise more evident than in their lineup of Reeds & Reed Valves. Starting with a single patent, founder Eyvind Boyesen revolutionized reed induction performance — his patented dual-stage reed produced stunning results, and motorcycles using Boyesen reeds were consistently outperforming bikes using other models of intake induction. Today, the brand's reed technology remains the benchmark for two-stroke performance across motocross, off-road, ATV, and even outboard marine applications.
The RAD Valve: Model-Specific Engineering
The flagship of Boyesen's reed valve lineup is the iconic RAD Valve. The Boyesen Rad Valve features a sophisticated array of performance attributes designed to provide peak horsepower gains, durability, and model-specific performance for each make/model/year machine. What truly sets it apart from generic aftermarket alternatives is its individualized approach: each Boyesen RAD Valve is unique — tailor made to that model, year, and displacement.
The latest iteration, the RC2 Rad Valve System, takes this philosophy even further. Boyesen engineers created a new lineage of aerodynamic intake technology by refining four primary performance factors: Aerodynamic Surface Optimization, Model-Specific Reed Petal Tensioning, Material Fuel Resistance, and Multi-Stage Reed Timing. The Rad Valve's seamless, one-piece, precision casting and continuous aero-form surfacing provide maximum flow velocities and instant, explosive movement of air particles the moment you turn the throttle.
Pro Series Reeds: The Power of Dual-Stage Design
For riders who want to upgrade their existing reed cage or replace worn petals in a Boyesen RAD Valve, the Pro Series Reeds deliver standout performance through Boyesen's signature dual-stage construction. Pro Series dual-stage reeds combine a carbon-fiber top reed with a fiberglass bottom reed — the carbon-fiber top provides excellent response characteristics for quicker acceleration, stronger throttle response, and more over-rev, while the fiberglass bottom reed provides stability and longer reed life.
The top reed is lightweight and resilient for crisp throttle response at partial throttle or low RPMs, while the stiffer bottom reed is ported to provide maximum flow and horsepower at higher RPMs. This split-material approach also addresses a classic trade-off in reed design: there is no sacrifice in reed life like traditional carbon fiber reeds.
CarbonTech Reeds: Tunable by the Rider
For riders who want to dial in their power delivery, Boyesen's CarbonTech Reeds offer a unique level of customization. Boyesen offers rider-customizable Carbon Tech reeds in Light Tension, Mid Tension, and High Tension variants — the only semi-custom, bolt-on, intake tuning solution that allows riders to alter their power delivery for more low-end response, a broad mid-range power, or more top-end overrev.
Boyesen's Moto Tass VF2 and VF3 Replacement Reeds are crafted exclusively as a higher quality, better performing, and longer-lasting replacement alternative for the most popular Moto Tass reed valve systems, including the VF4 as used on current KTM and Husqvarna two-stroke machines.
Power Reeds: The Proven Bolt-On Upgrade
The Power Reed line rounds out Boyesen's reed offerings as a proven, affordable upgrade for riders seeking tangible gains with minimal installation effort. Boyesen Power Reeds use a patented dual-stage fiberglass design for more airflow, more air velocity, and more overall power. Boyesen's RC2 Series Power Reeds are designed to be even more potent and durable, and remain one of the more approachable and most effective upgrades available for 2-stroke engines.
Whether you ride motocross, trail, enduro, or haul your ATV through the mud, Boyesen offers the most advanced suction solutions available for two-stroke engines, with continuous R&D, field tests, and feedback from buyers ensuring the highest quality standards. Browse the full selection to find the right reed or reed valve system for your specific machine.