Description
The intake charge enters your engine through the reed valve—and that’s where power is either gained or lost. Boyesen’s dual-stage reed design increases flow velocity across the entire operating pressure range, meaning better scavenging from idle through peak RPM. If you’re serious about maximizing your Yamaha 627’s potential, upgrading to a proven reed system is one of the highest-ROI modifications you can make.
Boyesen Racing Reeds have been laboratory flow-tested and proven to outperform OEM reeds under real-world conditions. You’ll notice stronger throttle response at lower RPMs and sustained acceleration gains all the way to redline—without sacrificing reliability or requiring extensive engine modifications.
- Yamaha 627 fitment
- Dual-stage reed design
- Laboratory flow-analyzed
- Increased flow velocity
- Improved low-end response
- Enhanced peak acceleration
- Bolt-on installation
- Proven race-tested performance
