Description
The factory reed valve is a compromise designed for broad compatibility, not peak performance. The Boyesen Racing Reed transforms your KX250’s intake efficiency through dual-stage design that maintains flow velocity across the entire RPM range—from crisp bottom-end response to sustained top-end acceleration. If you’re serious about maximizing your two-stroke’s potential, this is the direct path to measurable power gains.
Boyesen’s laboratory flow analysis eliminates guesswork. Their dual-stage reed geometry permits greater flow velocity over the complete operating pressure range, translating to faster throttle response, improved midrange punch, and stronger peak power delivery. This isn’t a marginal upgrade—it’s the difference between a stock motor and one that breathes.
- Dual-stage reed design
- Laboratory flow-tested
- Enhanced velocity across RPM range
- Improved start-up response
- Increased acceleration performance
- Fits: Kawasaki KX250 (’03)
- Bolt-on installation
- MPN: 6116
