These V-Force3 reed valve assemblies by Moto Tassinari are the reed valve systems of choice for anyone who's serious about 2-stroke engine performance. The simple premise of the V-Force3 reed valve assemblies is increasing throttle response and engine power throughout the band by increasing surface area, thus improving efficiency. Because the reed petals only need to travel half the distance of those on a conventional reed valve design, there is a greater chance of them being fully opened, as well as a better chance of sealing when they are "closed." Also, the V-Force3 reed valve assemblies generally last longer, as they receive less wear than the reed petals on a conventional reed valve design. You will receive improved performance from an improved design with Moto Tassinari V-Force3 reed valve assemblies.