Boyesen 673 Power Reeds for Yamaha Dirt Bikes

The Boyesen 673 Power Reeds are high-performance replacement reed valve petals designed specifically for Yamaha dirt bikes. Engineered to maximize engine performance, these reeds utilize Boyesen's patented dual-stage fiberglass construction that delivers superior durability and responsiveness across the powerband.

Key Features:

• Patented dual-stage fiberglass design for optimal flex characteristics
• Increases airflow and air velocity into the combustion chamber
• Improves throttle response and overall engine power output
• Direct replacement for OEM reed petals on compatible Yamaha models
• Race-proven construction for enhanced durability and longevity
• Precision-cut petals ensure proper sealing and performance

Boyesen Power Reeds are designed to provide a noticeable performance improvement over stock reed petals. The dual-stage fiberglass material allows the reeds to open more quickly on the intake cycle while maintaining proper sealing, resulting in improved low-end torque and mid-range power. These reeds are a popular upgrade for riders looking to extract more performance from their two-stroke Yamaha dirt bike without major engine modifications.