Reed Valve System Vforce 3 Yamaha Yz 85 2002-2018 Moto Tassinari

Vforce 3 lamellar pack produced by Moto Tassinari

The V-Force 3 has features that are not found in any other reed valve on the market.
Like the double contact surface, the adjustable lamella retainers, the flush surface of the lamella cage.
By doubling the contact surface of the lamella end it is sufficient to open the slat by 50% with respect to the original to obtain an equal flow.
A decisive advantage, if we consider that a lamella opens and closes 133 times per second at 8000 rpm.
The lamella works half of what an original lamella works with very low wear and longer component life.

Furthermore, a significant improvement in the delivery over the entire curve is obtained, with a significant boost at medium and low speeds. An instantaneous response of the engine to the throttle control is only the beginning of the list of improvements.

The petals of the slats now rest on a radiated surface, which creates a "loading" effect that improves an already lightning acceleration. The new design of the slat cage allows the slat to stay "recessed" in the cage itself, with a shock-absorbing effect on the end of the slat and preventing any kind of backflow in the suction duct.

Each V-Force valve is equipped with an adjustable blade stop that allows the lamella tension to be changed quickly from high to low.
This feature allows for precise adjustment of the delivery and the result is sensitive.

A low tension helps torque and low-range shooting, while high tension improves peak power.

What's new on V-Force 3:

Symmetrical lamella petals:
VForce3 now uses symmetrical lamella petals. This eliminates the differentiation between internal and external lamellas.
Faster blade change: VForce3 is the first reed valve with a patented interlocking slat fixing system. No more screws, just a moment to change the slats.
Specific flushing for each model Advanced composite materials for making lamellas:
New construction system in carbon fiber and resin, specific for the new design of VForce3
Fermi lamella of new design
Eliminates the need for fixing screws and reduces the possibility of breakage.
Wing profile applied to the slats
Increases the flow rate of the mixture, with an optimal pulverization.