VFORCE4X reeds box Yamaha YZ 250 / YZ 250 X Moto Tassinari

The new Mototassinari mototassinari Vforce4X boxes have been designed to offer exceptional durability and to overcome the shortcomings of the original reed intake system.

The Vforce4X also uses a new petal resin system, carbon fiber, and layers in the pre-curved reed petals.

The benefit of the pre-curved petal is better sealing at the tip area of the reed. The VForce4X also features longer reed stops to progressively reduce the speed of the petal tips, for greater petal durability.

The unique design of the VForce reed valve system features twice the reed tip surface area compared to a conventional reed valve design. This has two main benefits:

1) The reed petals only travel half the distance of a conventional reed valve design to achieve the same airflow.

2) Because the reed petals only need to travel half the distance compared to a conventional reed valve design, there is a greater chance they will open fully, as well as a better chance of sealing when "closed", resulting in more horsepower and a noticeable improvement in throttle response.

This Moto Tassinari V-Force intake reed system features a patented, cutting-edge membrane valve design.

The design accelerates the airflow mixture to deliver more horsepower to the engine with a noticeable improvement in throttle response, and a significant increase in the bike's performance.

This design has more advantages than the stock bikes, as the reeds offer a surface area twice as large, so they travel half the distance and achieve the same airflow and fuel flow.

The combination results in explosive acceleration, better throttle response, and greater fuel efficiency.

Valid for all Yamaha YZ 250