Description
Boyesen racing reeds are engineered to maximize intake flow velocity across your entire powerband, delivering measurable performance gains from cold start through peak acceleration. Laboratory flow analysis confirms that Boyesen’s dual-stage reed design outperforms standard reeds by permitting greater flow at all operating pressures. For serious Kawasaki 638 competitors and performance enthusiasts, upgrading to these reeds is a straightforward way to unlock your engine’s true potential.
- Dual-stage reed design
- Laboratory tested flow analysis
- Increased velocity all pressures
- Fits Kawasaki 638
- Bolt-on installation
- OEM alternative reed valve
- Improved startup performance
- Enhanced acceleration response
- Standard racing component
- MPN: 638
