{"product_id":"yamaha-yz85-2002-2022-v-force-reed-valve-system","title":"Yamaha YZ85 (2002-2022) V-Force Reed Valve System","description":"\u003cdiv style=\"font-family: Arial, sans-serif; color:#000000;\"\u003e\n  \u003ch2 style=\"margin-bottom:10px;\"\u003eYamaha YZ85 (2002-2022) V-Force Reed Valve System\u003c\/h2\u003e\n  \u003cp style=\"text-align: justify;\"\u003eBuilding on the solid foundation of the VF3, the VF4 has been enhanced with a range of improvements designed to optimise performance. The carbon fibre reed petals, combined with a new resin frame, significantly increase airflow—boosting it by 10% compared\n  to the standard system—delivering improved velocity and performance. Additionally, the VForce4 features external walls that shield and protect the reed petals, prolonging their durability.\u003c\/p\u003e\n \u003cp style=\"text-align: justify;\"\u003e\u003cstrong\u003eUnique VForce Reed Valve Design\u003c\/strong\u003e\u003c\/p\u003e\n \u003cp style=\"text-align: justify;\"\u003eThe VForce reed valve system offers double the reed-tip surface area of conventional reed valve designs, delivering two key benefits:\u003c\/p\u003e\n \u003cul\u003e\n  \u003cli\u003e\n  \u003cdiv style=\"text-align: justify;\"\u003e\n\u003cstrong\u003eReduced Reed Petal Travel: \u003c\/strong\u003eThe reed petals only need to travel half the distance of those in a conventional system to achieve the same airflow.\u003c\/div\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n  \u003cdiv style=\"text-align: justify;\"\u003e\n\u003cstrong\u003eImproved Performance and Durability:\u003c\/strong\u003e Reduced travel increases the likelihood of full petal opening and effective sealing when “closed.” While reed petals never fully close due to constant movement, their reduced motion in the VForce\n  system minimises wear, extending their lifespan.\u003c\/div\u003e\n  \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cp style=\"text-align: justify;\"\u003eFor context, at 8,000 RPM, a reed petal opens and closes 133 times per second. With the VForce design, less travel means significantly less stress and wear on the petals.\u003c\/p\u003e\n \u003cp style=\"text-align: justify;\"\u003e\u003cstrong\u003eStandard VForce Reed Valve Features:\u003c\/strong\u003e\u003c\/p\u003e\n \u003cul\u003e\n  \u003cli\u003e\n  \u003cdiv style=\"text-align: justify;\"\u003eDouble the reed-tip surface of conventional designs.\u003c\/div\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n  \u003cdiv style=\"text-align: justify;\"\u003eIncreased bottom-end power, stronger mid-range, and extended top-end performance.\u003c\/div\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n  \u003cdiv style=\"text-align: justify;\"\u003eImproved efficiency due to reduced reed petal travel.\u003c\/div\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n  \u003cdiv style=\"text-align: justify;\"\u003eIncreased airflow for greater horsepower.\u003c\/div\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n  \u003cdiv style=\"text-align: justify;\"\u003eReduced reed petal wear.\u003c\/div\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n  \u003cdiv style=\"text-align: justify;\"\u003eScrew-free design eliminates the risk of screws entering the motor.\u003c\/div\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n  \u003cdiv style=\"text-align: justify;\"\u003eScrew-free design allows quick and easy reed petal changes.\u003c\/div\u003e\n  \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cp style=\"text-align: justify;\"\u003e\u003cstrong\u003eNew and Improved VF4 Features:\u003c\/strong\u003e\u003c\/p\u003e\n \u003cul\u003e\n  \u003cli\u003e\n  \u003cdiv style=\"text-align: justify;\"\u003eAll-new reed petal resin system with carbon fibre construction and optimised lay-up.\u003c\/div\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n  \u003cdiv style=\"text-align: justify;\"\u003ePre-curved reed petals for improved sealing at the tip.\u003c\/div\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n  \u003cdiv style=\"text-align: justify;\"\u003eWider reed cage for maximum airflow.\u003c\/div\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n  \u003cdiv style=\"text-align: justify;\"\u003e10.5% increase in combined reed tip area, delivering enhanced overall airflow.\u003c\/div\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n  \u003cdiv style=\"text-align: justify;\"\u003eAirfoil-shaped cage tips to boost air velocity from the outer ports.\u003c\/div\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n  \u003cdiv style=\"text-align: justify;\"\u003eLong reed stops to progressively slow petal tip velocity, increasing durability.\u003c\/div\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n  \u003cdiv style=\"text-align: justify;\"\u003e15.6% reduction in the frontal area of the central wing, combined with a more aerodynamic shape.\u003c\/div\u003e\n  \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e","brand":"VForce","offers":[{"title":"Default Title","offer_id":56173880017276,"sku":"800313","price":260.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2964\/8754\/files\/800313_20-_20VF4_20YZ85_2002-22_20-_201_20-_20Front.png?v=1767182007","url":"https:\/\/beedspeed.com\/en-us\/products\/yamaha-yz85-2002-2022-v-force-reed-valve-system","provider":"Beedspeed","version":"1.0","type":"link"}