BOYESEN Radiator Valve - YZ250/X RAD-34J

If you're running a YZ250/X and want sharper throttle response with measurable power gains across the RPM range, the BOYESEN Radiator Valve is a direct bolt-on upgrade that improves intake charge distribution without requiring machine work. The patented dual-stage reed design optimizes flow velocity through the valve, ensuring more even distribution to your intake ports—translating to increased torque and horsepower you'll feel on the track or trail. One valve per cylinder means consistent performance gains throughout your engine.

• Fits: YZ250/X only
• MPN: RAD-34J
• Material: One-piece cast aluminum
• Installation: Bolt-on, no fabrication
• Reed design: Dual-stage patented
• Reed cage: Specially-designed, replaceable
• Benefit: Improved intake distribution
• Benefit: Sharper throttle response
• Benefit: Increased torque delivery
• Benefit: Power gains across RPM
• Quantity needed: One per cylinder