Description
If you’re running a KX125 and leaving performance on the table with a stock reed valve, Boyesen’s dual-stage design is engineered to unlock measurable gains in throttle response and peak horsepower. The patented two-reed configuration adapts across the RPM band—crisp response at partial throttle, maximum flow at wide-open—giving you the competitive edge in both trail and track conditions. Pair this with the included Rev-Plate reed stop, and you’re looking at a straightforward bolt-on upgrade that transforms how your engine breathes.
- Boyesen patented design
- Dual-stage reed system
- Lightweight top reed
- Ported bottom reed
- Improves low-RPM response
- Maximizes high-RPM flow
- Includes Rev-Plate stop
- Increased horsepower
- Kawasaki KX125 ’04-’08
- MPN: 6120
- Bolt-on installation
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