{"product_id":"vertex-23637b-piston-kit-kawasaki-kx85-moto-house-mx","title":"Vertex Replica Top End Piston Kit 23637B — Kawasaki KX85 \/ Big Wheel 2001-2024","description":"\u003ch1\u003e\u003cstrong\u003eVertex Replica Top End Piston Kit 23637B — Kawasaki KX85 \/ Big Wheel 2001-2024\u003c\/strong\u003e\u003c\/h1\u003e\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eGet your mini-racer back to the front of the pack with the Vertex Replica Piston Kit. Explicitly engineered as a premium direct-fit OE replacement, this top-end rebuild setup restores lost factory compression and crisp throttle response. When a small-bore race bike starts logging high track hours, upgrading to a specialized \u003cstrong\u003eVertex 2-stroke piston\u003c\/strong\u003e ensures reliable power delivery, crisp acceleration, and maximum mechanical longevity.\u003c\/p\u003e\n\u003cp\u003eProudly manufactured in Italy, Vertex uses a gravity-cast aluminum alloy enriched with 18% silicone to tightly regulate thermal expansion and reduce ring land wear. The entire piston structure undergoes a precise T-5 hardening and tempering heat treatment cycle to boost structural strength, while a high-tech molybdenum disulphite coating is applied to the skirt to lower operational friction and facilitate a flawless break-in process. This kit keeps your rotating assembly operating smoothly under severe racing loads.\u003c\/p\u003e\n\u003ch3\u003eTop Features: Vertex Replica Piston Kit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e18% Silicon Aluminum Alloy:\u003c\/strong\u003e Advanced cast construction minimizes dimensional shifting under high exhaust port heat for stable piston-to-wall clearances.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMolybdenum Disulphite Skirt Coating:\u003c\/strong\u003e Lubricious barrier protects the critical cylinder cross-hatch pattern and accelerates initial break-in seating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull T-5 Thermal Treatment:\u003c\/strong\u003e Hardening and tempering cycles maximize the alloy's structural integrity to withstand aggressive, high-rpm track conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComprehensive Rebuild Components:\u003c\/strong\u003e Bundled complete with a precision-ground wrist pin, high-tensile wire circlips, and factory-matched piston rings for a secure refresh.\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\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;\"\u003e2001-2024\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eKawasaki\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eKX85\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;\"\u003e2001-2018\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eKawasaki\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eKX85 Big Wheel (BW)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why should I choose the \"B\" size over an \"A\" size piston?\u003c\/strong\u003e\u003cbr\u003eA: Small-bore cylinders naturally experience microscopic cylinder wear after a few top-end cycles. The \"B\" size piston features a fractional increment change (48.45 mm) over the baseline \"A\" size to take up that minute clearance gap, cleanly sealing compression back to original specifications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Are the wrist pin and small-end bearing included in this box?\u003c\/strong\u003e\u003cbr\u003eA: The kit includes the wrist pin, piston rings, and circlips. The small-end needle bearing is a separate replacement item and should always be replaced freshly during a top-end rebuild.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExpert Pro-Tip:\u003c\/strong\u003e When installing your piston rings, pay close attention to the small identification markings near the ring gap end. These stamped marks must always face upward toward the cylinder head. Additionally, always make sure the ring ends seat perfectly over the anti-rotation locating pins in the piston ring grooves before attempting to slide the cylinder down over the top assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRecommended Pairings:\u003c\/strong\u003e\u003cbr\u003eo \u003ca href=\"https:\/\/motohousemx.com\/collections\/kawasaki-kx85-performance-upgrades-modifications-moto-house-mx\"\u003eKawasaki KX85 Performance Parts \u0026amp; Upgrades\u003c\/a\u003e\u003cbr\u003eo \u003ca href=\"https:\/\/motohousemx.com\/collections\/kawasaki-kx-2-stroke-performance-parts-moto-house-mx-is-your-ultimate-destination-for-high-performance-kits-and-aftermarket-accessories\"\u003eKawasaki KX 2-Stroke Performance Parts\u003c\/a\u003e\u003cbr\u003eo \u003ca href=\"https:\/\/motohousemx.com\/collections\/premium-motorcycle-chemicals-brake-fluid-bike-wash-coolant-chain-lubes\"\u003ePremium Motorcycle Chemicals \u0026amp; 2-Stroke Oil\u003c\/a\u003e\u003c\/p\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 bikes. Every order ships fast from our Central Florida location.\u003c\/p\u003e\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\u003cp\u003e \u003c\/p\u003e","brand":"Vertex","offers":[{"title":"Default Title","offer_id":41244100686,"sku":"23637B","price":154.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/vertex-oem-replacemant-piston-kit-23637b-2001-2024-kawasaki-kx85-804391.jpg?v=1738047482","url":"https:\/\/motohousemx.com\/products\/vertex-23637b-piston-kit-kawasaki-kx85-moto-house-mx","provider":"Moto-House MX","version":"1.0","type":"link"}