V-Force 4 Yamaha Banshee Valve Assembly

Valve Assembly V-Force 4

The V-Force reed valve system by Moto Tassinari has been the reed valve system of choice by anyone serious about two-stroke engine performance for the last 10+ years.

• Double the reed tip surface over a conventional reed valve design.
• Increased bottom end, stronger mid-range and longer top-end.
• Greater efficiency due to reduced reed petal travel.
• More airflow means more horsepower.
• Reduced reed petal wear.
• Screw free design eliminates risk of screws going through motor.
• Screw free design enables super quick reed petal changes.
• 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.
• Reduced frontal area of central wing by 15.6% combined with a more aerodynamic shape.