Description
A stock reed valve is your two-stroke’s hidden bottleneck—it restricts flow velocity across the entire operating range, costing you response time and peak power. Boyesen’s dual-stage reed design eliminates that restriction, proven through laboratory flow analysis to outperform standard reeds and deliver measurable gains from cold start through full acceleration. If you’re serious about two-stroke performance, this is a bolt-on upgrade that actually works.
- Dual-stage reed design
- Laboratory flow tested
- Increases flow velocity
- Improved startup response
- Enhanced mid-range acceleration
- Full RPM range optimization
- Yamaha 645 fitment
- Bolt-on installation
- OEM-quality construction
