Description
If you’re running a Suzuki RM250 and leaving throttle response on the table, a Boyesen Radiator Valve is the bolt-on upgrade that’ll sharpen your power delivery across the entire RPM band. By optimizing intake charge distribution and maintaining consistent flow velocity through the valve, this piece unlocks measurable gains in both torque and horsepower while keeping installation straightforward. The dual-stage reed design is purpose-built to handle the demands of high-RPM racing—this isn’t a compromise, it’s a precision tool.
- Boyesen RAD-24K valve
- Fits RM250 ’04-’08
- One-piece cast aluminum
- Bolt-on installation
- Patented dual-stage reeds
- Optimized reed cage
- Increased throttle response
- Enhanced torque output
- Improved horsepower delivery
- Even intake distribution
- Maintains flow velocity
- One set per cylinder









