Description
If you’re running a KTM 65 SX and want measurable gains in throttle response and mid-range torque, a Boyesen radiator valve is one of the highest-ROI bolt-on modifications available. By optimizing intake charge distribution and maintaining flow velocity through the valve, you’ll feel sharper power delivery across the entire RPM band. This is the kind of engineering that separates competitive machines from the rest.
Boyesen’s RAD-40A features their patented dual-stage reed design housed in a purpose-built reed cage. Installation is straightforward—the one-piece cast aluminum body bolts directly in place without fabrication or machine work.
- Dual-stage reed design
- Cast aluminum construction
- Bolt-on installation
- Improves intake distribution
- Sharper throttle response
- Increased mid-range torque
- One per cylinder
- KTM 65 SX specific
- MPN: RAD-40A
