{"product_id":"moto-tassinari-v4144-2-v-force-4-reed-valve-kit-for-yamaha-atv","title":"MOTO TASSINARI V4144-2 V-Force 4 Reed Valve Kit for Yamaha ATV","description":"Yamaha RD250, 350 \u0026amp; 400 owners please note: Installing these reed valves will require modification of the intake port of the cylinders. While the bolt pattern is the same, the valve will not just slide in. Material removal on the intake port walls will be required. If you do not have the ability to carry out the modifications please do not purchase the valves.\u003cbr\u003e\u003cbr\u003eThe all-new VForce4 is built upon the solid foundation that has made the VForce3 such a success for the last 10 years. While the VForce3 has been continually refined over the years, this is a complete redesign of the entire system. We jokingly say, \"The only thing we didn't change is the bolt pattern.\" However this is actually quite true. All the components that go into making a VForce reed valve system have been significantly changed since the VForce3.\u003cbr\u003e\u003cbr\u003eThe unique design of the VForce reed valve system features double the reed tip surface over a conventional reed valve design. This has two major benefits: 1) The reed petals only travel half the distance as a conventional reed valve design to get the same airflow. 2) Because the reed petals only need to travel half the distance of that 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\". A reed petal never truly \"closes\" in a classic sense, as it is always in movement. Consider this, an engine operating at 8,000 RPM results in a reed petal opening and closing 133 times in one second. This fact, sheds light on another VForce advantage. Since the petals are only traveling half the distance, they generally last longer as they receive less wear than the reed petals on a conventional reed valve design.\u003cbr\u003e\u003cbr\u003eSTANDARD VFORCE REED VALVE FEATURES\u003cbr\u003eDouble the reed tip surface over a conventional reed valve design\u003cbr\u003eIncreased bottom end, stronger mid-range and longer top-end\u003cbr\u003eGreater efficiency due to reduced reed petal travel\u003cbr\u003eMore airflow means more horsepower\u003cbr\u003eReduced reed petal wear\u003cbr\u003eScrew free design eliminates risk of screws going through motor\u003cbr\u003eScrew free design enables super quick reed petal changes\u003cbr\u003eNEW AND IMPROVED VFORCE4 FEATURES\u003cbr\u003eAll-new reed petal resin system, carbon fiber and lay-up\u003cbr\u003ePre-curved reed petal ensures better seal at tip\u003cbr\u003eWider reed cage for maximum airflow\u003cbr\u003eCombined reed tip area increased by 10.5% resulting in increased total air flow\u003cbr\u003eAirfoil shape added to cage tip to increase air velocity from outer ports\u003cbr\u003eLong reed stops added to progressively slow petal tip velocity, for increased petal durability\u003cbr\u003eReduced frontal area of central wing by 15.6% combined with a more aerodynamic shape\u003cbr\u003e\n\u003cp\u003eEnhance your Yamaha ATV's performance with the MOTO TASSINARI V4144-2 V-Force 4 Reed Valve Kit. Designed specifically for optimal fit and function, this kit includes everything necessary to upgrade your ATV's intake system for improved throttle response and power delivery. Crafted with precision, the V-Force 4 reed valves are engineered from high-quality materials to ensure durability and reliability during demanding riding conditions. Installing this kit can lead to noticeable improvements in acceleration, overall engine efficiency, and throttle feel, making it a popular upgrade among ATV enthusiasts.\u003cbr\u003eEach component is manufactured to strict specifications, ensuring a perfect fit and seamless integration with your Yamaha ATV's existing intake system. The V-Force 4 design features a unique reed valve configuration that optimizes airflow and minimizes turbulence within the intake manifold. This results in more efficient fuel combustion and increased horsepower across the RPM range. Whether you're racing or riding for recreation, this kit provides a tangible boost in engine performance and responsiveness.\u003cbr\u003eThe kit's components are easy to install, making it suitable for both experienced mechanics and DIY enthusiasts. With a focus on quality and performance, MOTO TASSINARI's V-Force 4 reed valves are a reliable choice for those seeking to maximize their ATV's potential while maintaining engine longevity. Trust in the brand's reputation for high-performance parts designed for demanding off-road adventures and competitive racing environments.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eHigh-quality reed valves designed for maximum airflow and engine response\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePrecision-engineered for seamless fit with Yamaha ATV models\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eDurable construction to withstand demanding off-road conditions\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eImproves throttle response and engine power across RPM range\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eEasy to install with comprehensive kit components\u003c\/li\u003e\u003c\/ul\u003e","brand":"MOTO TASSINARI","offers":[{"title":"Default Title","offer_id":44588221071402,"sku":"V4144-2","price":211.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/2285\/8794\/files\/LG8F48EA61-7319-4EFE-A7A9-DF19EF4A581C.jpg?v=1784289029","url":"https:\/\/atticusgoods.com\/products\/moto-tassinari-v4144-2-v-force-4-reed-valve-kit-for-yamaha-atv","provider":"Atticus Goods","version":"1.0","type":"link"}