{"product_id":"vertex-23119b-piston-kit-cast-replica-yamaha-yz125-yz125x-moto-house-mx","title":"Vertex Piston Kit Cast Replica 23119B (53.94mm) — Yamaha YZ125\/X 2005-2022","description":"\u003ch2\u003e\u003cstrong\u003eVertex Piston Kit Cast Replica 23119B — 2005-2022 Yamaha YZ125\/X (53.94mm)\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eBring back the crisp, high-RPM power of your Yamaha 125 with the Vertex Cast Replica Piston Kit (23119B). Precision engineered as a direct factory OE replacement, this kit features a 53.94mm piston designed specifically for the 2005–2021 Yamaha YZ125 and the 2020–2022 Yamaha YZ125X off-road models.\u003c\/p\u003e\n\u003cp\u003eVertex cast pistons are constructed from a gravity-cast aluminum alloy featuring an 18% silicone content. This advanced metallurgy heavily reduces thermal expansion, ensuring the piston maintains its exact shape under intense 2-stroke operating temperatures. Combined with a factory-applied Molybdenum Disulphite skirt coating, this kit guarantees accelerated break-in times, reduced internal friction, and an extended top-end lifespan.\u003c\/p\u003e\n\u003ch3\u003eTop Features: Vertex Piston Kit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect OE Replacement:\u003c\/strong\u003e Designed to look, fit, and perform exactly like the original factory equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Silicone Content:\u003c\/strong\u003e 18% silicone content stabilizes the piston structure and prevents distortion under extreme heat cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoly-Coated Skirt:\u003c\/strong\u003e The high-tech Molybdenum Disulphite coating minimizes friction to safe-guard against premature scuffing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT-5 Heat Treatment:\u003c\/strong\u003e Undergoes a full hardening and tempering cycle to elevate overall component durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Setup:\u003c\/strong\u003e Includes the precision-ground piston, premium piston rings, wrist pin, and replacement circlips.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment List\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #ddd; font-family: sans-serif;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f4f4f4; text-align: left;\"\u003e\n\u003cth style=\"padding: 12px; border: 1px solid #ddd;\"\u003eYear Range\u003c\/th\u003e\n\u003cth style=\"padding: 12px; border: 1px solid #ddd;\"\u003eVehicle Model\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e2005-2021\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eYamaha YZ125\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e2020-2022\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eYamaha YZ125X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this cast piston if my cylinder has a standard bore size?\u003c\/strong\u003e\u003cbr\u003eA: Yes, this 53.94mm piston is an \"A\" or standard size replica meant to drop cleanly into a healthy, factory-spec 54.00mm bore cylinder. Always measure your cylinder with a bore gauge to verify clearance tolerances prior to completing assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExpert Pro-Tip:\u003c\/strong\u003e When installing the new circlips, always block the crankcase opening with a clean rag. This prevents an accidental slip from dropping a circlip into the bottom-end of your engine. Ensure the circlip gap faces away from the removal notch on the piston pin bore.\u003c\/p\u003e\n\u003ch3\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/motohousemx.com\/collections\/mx-off-road-motorcycle-tools\"\u003eEssential Off-Road Motorcycle Tools\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/motohousemx.com\/collections\/premium-motorcycle-chemicals-brake-fluid-bike-wash-coolant-chain-lubes\"\u003eHigh-Performance Premix \u0026amp; Gear Oils\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\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 machines. Every order ships fast from our Central Florida location.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMoto-House MX – Choice of Champions – Clermont \/ Montverde, FL. Central Florida's premier powersports source with lightning-fast worldwide shipping.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"VERTEX","offers":[{"title":"Default Title","offer_id":42082527215699,"sku":"23119B","price":141.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/vertex-oem-replica-piston-kit-23119b-2005-2021-yamaha-yz125-and-2020-2021-yz125x-284046.jpg?v=1738047595","url":"https:\/\/motohousemx.com\/products\/vertex-23119b-piston-kit-cast-replica-yamaha-yz125-yz125x-moto-house-mx","provider":"Moto-House MX","version":"1.0","type":"link"}