{"product_id":"moto-tassinari-vforce4r-v4r04-reed-valve-yamaha-yz125-yz125x-moto-house-mx","title":"Moto Tassinari VForce4R Reed Valve Set V4R04 — Yamaha YZ125 \/ YZ125X 2005-2026","description":"\u003cdiv\u003e\n  \u003ch1\u003e\u003cstrong\u003eMoto Tassinari VForce4R Reed Valve Set V4R04 — Yamaha YZ125 \/ YZ125X 2005-2026\u003c\/strong\u003e\u003c\/h1\u003e\n\n  \u003ch2\u003eProduct Description\u003c\/h2\u003e\n  \u003cp\u003eThe \u003cstrong\u003eMoto Tassinari VForce4R V4R04\u003c\/strong\u003e is the ultimate intake upgrade for riders looking to unlock the full potential of their \u003cstrong\u003eYamaha YZ125 and YZ125X\u003c\/strong\u003e. Designed with a clean-sheet approach, this system features an all-new manifold, reed cage, and air guide, specifically engineered to provide a 10.5% increase in combined reed tip area. By reducing the frontal area of the central wing by 15.6% and utilizing optimized airfoil shapes, the VForce4R significantly improves air velocity and total airflow for crisp, immediate throttle response across the entire RPM range.\u003c\/p\u003e\n  \u003cp\u003eEngineered for professional-level durability, the \u003cstrong\u003eVForce4R\u003c\/strong\u003e introduces advanced features like long reed stops that progressively slow petal tip velocity, greatly extending the life of the carbon fiber reeds. The cage tips feature rubber overmolding to dampen impact, while the pre-curved reed petals ensure an airtight seal at the tip to eliminate power-robbing blowback. Proudly made in the USA, this reed valve set is the industry standard for 2-stroke engine efficiency.\u003c\/p\u003e\n\n  \u003ch3\u003eTop Features: Moto Tassinari VForce4R\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIncreased Airflow:\u003c\/strong\u003e 10.5% larger reed tip area for superior power delivery.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEnhanced Durability:\u003c\/strong\u003e Long reed stops and rubber overmolding protect petals from high-speed fatigue.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAerodynamic Engineering:\u003c\/strong\u003e Reduced central wing area and airfoils increase air velocity.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrecision Sealing:\u003c\/strong\u003e New carbon fiber resin system with pre-curved petals ensures a perfect seal.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eComplete Upgrade:\u003c\/strong\u003e Includes all-new manifold, reed cage, and air guide for a perfect fit.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\u003cem\u003ePlease review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.\u003c\/em\u003e\u003c\/p\u003e\n\n  \u003ch2\u003eFitment List\u003c\/h2\u003e\n  \u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #e0e0e0; margin-top: 15px; margin-bottom: 15px;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"background-color: #f7f7f7;\"\u003e\n        \u003cth style=\"border: 1px solid #e0e0e0; padding: 12px; text-align: left; font-weight: bold; color: #333333;\"\u003eYear Range\u003c\/th\u003e\n        \u003cth style=\"border: 1px solid #e0e0e0; padding: 12px; text-align: left; font-weight: bold; color: #333333;\"\u003eVehicle Brand\u003c\/th\u003e\n        \u003cth style=\"border: 1px solid #e0e0e0; padding: 12px; text-align: left; font-weight: bold; color: #333333;\"\u003eVehicle Model \u0026amp; Sub-Model\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e2005-2026\u003c\/td\u003e\n        \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eYamaha\u003c\/td\u003e\n        \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eYZ125\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n        \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e2020-2026\u003c\/td\u003e\n        \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eYamaha\u003c\/td\u003e\n        \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eYZ125X\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n  \u003cp\u003e\u003cstrong\u003eQ: Is this a direct bolt-on upgrade?\u003c\/strong\u003e\u003cbr\u003e\n  A: Yes, the V4R04 is designed to bolt directly onto your Yamaha YZ125\/YZ125X intake tract without requiring any permanent modifications to your engine cases.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eQ: How often should I inspect the reed petals?\u003c\/strong\u003e\u003cbr\u003e\n  A: We recommend checking your reed petals during every top-end refresh. If you notice any fraying, chipping, or if they no longer seat perfectly flat against the cage, it is time for a replacement set.\u003c\/p\u003e\n\n  \u003cp\u003e\u003cstrong\u003eExpert Pro-Tip:\u003c\/strong\u003e When installing the VForce4R, always inspect your intake boot for dry rot or cracks. A small leak in the intake boot will lean out your jetting and potentially damage your top-end. Ensure all mounting surfaces are clean and the hardware is tightened evenly in a cross pattern to prevent air leaks.\u003c\/p\u003e\n\n  \u003cp\u003e\u003cstrong\u003eRecommended Pairings:\u003c\/strong\u003e\u003cbr\u003e\n  o    \u003ca href=\"https:\/\/motohousemx.com\/collections\/unlock-peak-performance-for-your-yamaha-yz125-high-quality-parts-accessories\"\u003eYamaha YZ125 Performance Parts \u0026amp; Upgrades\u003c\/a\u003e\u003cbr\u003e\n  o    \u003ca href=\"https:\/\/motohousemx.com\/collections\/yamaha-2-stroke-dirt-bikes-performance-parts-accessories-moto-house-mx\"\u003eYamaha 2-Stroke Performance Parts\u003c\/a\u003e\u003cbr\u003e\n  o    \u003ca href=\"https:\/\/motohousemx.com\/collections\/mx-off-road-motorcycle-tools\"\u003eEssential Intake Maintenance Tools\u003c\/a\u003e\u003c\/p\u003e\n\n  \u003cp\u003eAt Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. Every order ships fast from our Central Florida location.\u003c\/p\u003e\n\n  \u003cp\u003e\u003cem\u003e\u003cstrong\u003eMoto-House MX – Choice of Champions\u003c\/strong\u003e – Clermont \/ Montverde, FL. Central Florida's premier powersports source with lightning-fast worldwide shipping.\u003c\/em\u003e\u003c\/p\u003e\n\n  \u003cscript type=\"application\/ld+json\"\u003e\n  {\n    \"@context\": \"https:\/\/schema.org\/\",\n    \"@type\": \"Product\",\n    \"name\": \"Moto Tassinari VForce4R Reed Valve Set V4R04\",\n    \"brand\": {\n      \"@type\": \"Brand\",\n      \"name\": \"Moto Tassinari\"\n    },\n    \"mpn\": \"V4R04\",\n    \"description\": \"High-performance VForce4R intake system for Yamaha YZ125\/YZ125X, featuring enhanced airflow, carbon fiber petals, and superior durability.\"\n  }\n  \u003c\/script\u003e\n\u003c\/div\u003e","brand":"Moto Tassinari","offers":[{"title":"Default Title","offer_id":21386631217235,"sku":"V4R04","price":161.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/mototassinari-vforce4-reed-valve-v4r04-2005-2024-yamaha-yz125-and-yz125x-894789.jpg?v=1735458727","url":"https:\/\/motohousemx.com\/products\/moto-tassinari-vforce4r-v4r04-reed-valve-yamaha-yz125-yz125x-moto-house-mx","provider":"Moto-House MX","version":"1.0","type":"link"}