VForce4 Reed Valve Box Yamaha Blaster

New carbon reed box V-Force 4, which replaces the V-Force 3. It considerably increases low-end performance, resulting in more output power for your bike.

The new VForce 4R reed box has been designed to offer exceptional durability and significantly improve the performance of the original reed system.

The unique design of the VForce reed valve system features double 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 compared to a conventional reed valve design to achieve the same airflow.

2) Because the reed petals only need to travel half the distance of 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 V-Force intake reed system from Moto Tassinari features a patented, cutting-edge membrane valve design.

The design accelerates the air-fuel mixture flow to deliver more horsepower to the engine, with a notable 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.