VForce4 Reed Valve System

The Moto Tassinari VForce4 reed valve system is a redesign of the VForce3. It features double the reed tip surface area compared to conventional reed valve designs, which allows reed petals to travel half the distance for the same airflow. This leads to a greater chance of the petals being fully open and sealing properly, while also reducing wear.

The VForce4 system offers increased bottom end, stronger mid-range, and longer top-end performance. It provides more airflow, which translates to more horsepower, and a screw-free design eliminates the risk of screws entering the motor and allows for quick reed petal changes.