Air and Fuel› Air Cleaners, Filters, Intakes and Components

Moto Tassinari

V-Force 4 Reed Valve System

$258.95

SKU: V4144-2

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The Moto Tassinari V-Force 4 is a high-performance reed valve system designed to optimize air intake and engine efficiency. This system features a unique design that doubles the reed tip surface area compared to conventional valves, allowing for improved flow and better petal sealing.

Built for durability and increased power, this reed valve system utilizes a screw-free design to minimize the risk of hardware ingestion while enabling faster petal changes. It provides enhanced bottom-end, mid-range, and top-end performance.
Show original supplier description
The Moto Tassinari V-Force 4 is an advanced reed valve system engineered as a complete redesign of the previous VForce3 platform. By doubling the reed tip surface, the petals travel only half the distance of conventional designs to achieve the same airflow, which improves both responsiveness and sealing performance. The system incorporates an all-new carbon fiber reed petal resin system and a wider cage to maximize total airflow. Additional features include an airfoil shape on the cage tip to increase air velocity from the outer ports and long reed stops to slow petal tip velocity, enhancing overall component durability. Installation for Yamaha RD250, RD350, and RD400 models requires specific modification of the cylinder intake ports. Although the bolt pattern is compatible, the valve will not slide in without material removal on the intake port walls. Owners without the ability to perform these modifications should not purchase this system for those specific models. The package includes two complete reed valve assemblies, gaskets, decals, and detailed installation instructions. This system is explicitly designed for the Yamaha YFZ350 Banshee (all model years) and requires no modifications for those specific applications. The screw-free construction eliminates the risk of loose fasteners entering the engine while allowing for rapid reed petal replacement.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandMoto Tassinari
Part NumberV4144-2
CategoryAir and Fuel

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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