Description
If you’re serious about extracting maximum performance from your RM125, the Boyesen Radiator Valve is a straightforward way to gain noticeable gains in throttle response and mid-to-top-end horsepower. By optimizing intake charge velocity and distribution across all ports, this valve delivers sharper engine response and increased torque throughout the RPM range. It’s a bolt-on upgrade that pays dividends without requiring extensive fabrication or tuning.
- Maintains flow velocity
- Even intake distribution
- Quicker throttle response
- Increased horsepower
- Enhanced torque delivery
- Dual-stage reed design
- Patented reed cage
- One-piece cast aluminum
- Bolt-on installation
- One set per cylinder
- Manufacturer: Boyesen
- Part Number: RAD21F
- Fits: RM125









