{"product_id":"vertex-replica-cast-top-end-piston-kit-ktm-husqvarna-gas-gas-85cc-moto-house-mx","title":"Vertex OEM Replica Cast Top End Piston Kit VTK24212 — KTM \/ Husqvarna \/ Gas Gas 85cc 2018-2025","description":"\u003cdiv\u003e\n\u003ch1\u003e\u003cstrong\u003eVertex OEM Replica Cast Top End Piston Kit VTK24212 — KTM \/ Husqvarna \/ Gas Gas 85cc 2018-2025\u003c\/strong\u003e\u003c\/h1\u003e\n\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\n\u003cp\u003eRestore factory-level compression and power to your mini racer with the \u003cstrong\u003eVertex OEM Replica Cast Top End Piston Kit\u003c\/strong\u003e. As the trusted OEM supplier for 2-stroke pistons in modern KTM, Husqvarna, and Gas Gas machines, Vertex delivers exact-spec performance for 85cc engines. Whether you are prepping for a full season of racing or just performing routine maintenance, this kit provides every critical component required to rebuild your top end correctly.\u003c\/p\u003e\n\n\u003cp\u003eManufactured from a gravity-cast aluminum alloy featuring an 18% silicone content, this piston is incredibly light while maintaining structural rigidity under high RPM loads. Each unit undergoes a rigorous T-5 hardening and tempering cycle, paired with molybdenum disulfide-coated skirts to reduce friction and accelerate the break-in process. Vertex also produces this kit in standard A, B, and C sizing, allowing you to match the piston precisely to your cylinder's bore wear.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTop Features: Vertex Top End Piston Kit\u003c\/strong\u003e\u003cbr\u003e\no    Exact OEM replacement for KTM, Husqvarna, and Gas Gas 2-stroke engines\u003cbr\u003e\no    Gravity-cast aluminum alloy construction with 18% silicone content for high heat resistance\u003cbr\u003e\no    T-5 hardening and tempering heat cycle prevents thermal expansion distortion\u003cbr\u003e\no    Molybdenum disulfide-coated piston skirts reduce friction and break-in time\u003cbr\u003e\no    Comprehensive kit includes piston, OEM-spec rings, wrist pin, circlips, wrist pin bearing, and top-end gaskets\u003c\/p\u003e\n\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\u003e\n  \u003ctr\u003e\n    \u003cth\u003eYear Range\u003c\/th\u003e\n    \u003cth\u003eVehicle Brand\u003c\/th\u003e\n    \u003cth\u003eVehicle Model \u0026amp; Sub-Model\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e2021-2025\u003c\/td\u003e\n    \u003ctd\u003eGas Gas\u003c\/td\u003e\n    \u003ctd\u003eMC 85 (17\/14 \u0026amp; 19\/16)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e2018-2025\u003c\/td\u003e\n    \u003ctd\u003eHusqvarna\u003c\/td\u003e\n    \u003ctd\u003eTC 85 (17\/14 \u0026amp; 19\/16)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e2021\u003c\/td\u003e\n    \u003ctd\u003eHusqvarna\u003c\/td\u003e\n    \u003ctd\u003eTC 65\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e2018-2025\u003c\/td\u003e\n    \u003ctd\u003eKTM\u003c\/td\u003e\n    \u003ctd\u003e85 SX (17\/14 \u0026amp; 19\/16)\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What size piston do I need: A, B, or C?\u003c\/strong\u003e\u003cbr\u003e\nA: The \"A\" size is standard for a brand-new cylinder. As your cylinder naturally wears, you step up to a \"B\" and eventually a \"C\" piston to maintain tight, factory-spec piston-to-cylinder wall clearances. If your cylinder has hours on it, you should measure the bore with a micrometer before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does this kit include everything needed for a top-end rebuild?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, this is a complete top-end kit. It includes the piston, piston rings, wrist pin, circlips, a complete top-end gasket kit (base gasket, head o-rings, exhaust gasket), and a new wrist pin bearing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eExpert Pro-Tip:\u003c\/strong\u003e Always check your ring end gap by squaring the ring in the cylinder bore before installation. Even with top-tier cast pistons like Vertex, manufacturing tolerances stack. Additionally, pay close attention to the A, B, and C sizing. If your cylinder has over 40-50 hours on it, dropping a standard \"A\" piston in might leave you with too much piston-to-wall clearance, leading to premature skirt wear and piston slap. Size up to a B or C appropriately based on your actual bore measurements.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRecommended Pairings:\u003c\/strong\u003e\u003cbr\u003e\no    \u003ca href=\"https:\/\/motohousemx.com\/collections\/new-ktm-85-sx-performance-upgrades-engine-mods-accessories-moto-house-mx\"\u003eKTM 85 SX Performance Parts \u0026amp; Upgrades\u003c\/a\u003e\u003cbr\u003e\no    \u003ca href=\"https:\/\/motohousemx.com\/collections\/husqvarna-tc-85-performance-upgrades-engine-mods-accessories-moto-house-mx\"\u003eHusqvarna TC 85 Performance Parts\u003c\/a\u003e\u003cbr\u003e\no    \u003ca href=\"https:\/\/motohousemx.com\/collections\/gas-gas-mc-85-performance-parts-and-accessories-moto-house-mx\"\u003eGas Gas MC 85 Performance Parts\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\": \"Vertex OEM Replica Cast Top End Piston Kit VTK24212 — KTM \/ Husqvarna \/ Gas Gas 85cc 2018-2025\",\n  \"image\": \"\",\n  \"description\": \"Vertex VTK24212 OEM Replica Cast Top End Piston Kit for KTM 85 SX, Husqvarna TC 85, and Gas Gas MC 85. Includes gaskets and bearing. 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