Description
A properly tuned reed valve system is critical to maximizing your engine’s intake efficiency, and Boyesen’s dual-stage design delivers measurable flow improvements across the entire RPM range. Laboratory testing confirms that these reeds sustain higher flow velocities at all operating pressures, translating to sharper throttle response and stronger acceleration from idle to redline. If you’re serious about extracting every bit of performance from your Yamaha 654, upgrading to precision-engineered reeds is one of the most effective bolt-on modifications available.
- Dual-stage reed design
- Increased flow velocity
- Full operating range coverage
- Improved startup performance
- Enhanced mid-range acceleration
- Laboratory flow tested
- Yamaha 654 specific fitment
- Bolt-on installation
- OEM replacement compatible
