Description
The stock reed valve is your two-stroke’s bottleneck. Boyesen’s dual-stage reed design eliminates that restriction, delivering measurably higher flow velocity across your entire power band—from crisp throttle response at low RPM to sustained acceleration at redline. If you’re serious about extracting every bit of performance from your KX250, a proven reed upgrade is one of the highest-ROI modifications you can make.
Boyesen reeds are engineered through rigorous laboratory flow analysis to outperform standard single-stage designs. You’ll feel the difference immediately: snappier bottom-end response and a broader powerband that translates to real lap times on the track or trail.
- Fits: Kawasaki KX250 (1999)
- MPN: 688
- Dual-stage reed design
- Optimized flow velocity
- Laboratory flow tested
- Bolt-on installation
- Stock reed replacement
- Improves low-end response
- Extends effective powerband
- OEM-quality construction
