VForce 4 Reed Valve System for 17-19 KTM 250SX

The all-new V-Force 4 is built upon the solid foundation that has made the V-Force 3 such a success for the last 10 years. While the V-Force 3 has been continually refined over the years, this is a complete redesign of the entire system. Key Features on the V-Force 4 Reed Valve System: All-new reed petal resin system, carbon fiber and lay-up. Pre-curved reed petal ensures better seal at tip. Wider reed cage for maximum airflow. Combined reed tip area increased by 10.5% resulting in increased total air flow. Airfoil shape added to cage tip to increase air velocity from outer ports. Long reed stops added to progressively slow petal tip velocity, for increased petal durability. Red