Moto Tassinari V-Force 3 Reed Valve System - V355B. Overview of Moto Tassinari V-Force 3 Reed Valve System - V355B. The VForce 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.The simple premise of the VForce3 reed valve system is to increase engine power and throttle response by increasing the efficiency over a conventional reed valve design. VForce3 Features Double the reed tip surface over a conventional reed valve design Increased bottom end, stronger mid-range and lover 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. This item fits the following machines.