{"product_id":"athena-90mm-stock-bore-race-cylinder-kit-kawasaki-kfx400-suzuki-lt-z400-dr-z400-2000-2016","title":"KFX400 \/ LT-Z400 \/ DR-Z400 90mm Stock Bore Race Kit – Athena (2000-2016)","description":"\u003cp class=\"font-claude-response-body whitespace-normal break-words\"\u003eRebuild with factory-level performance—no machining required. Bolt-on stock bore kit with Factory Works porting, 12.2:1 piston, and race-proven durability for ATV, supermoto, or dual-sport builds.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body whitespace-normal break-words\"\u003eThe Athena P400510100001 is a complete 90mm stock bore race cylinder kit for 2000–2016 Kawasaki KFX400\/KLX400, Suzuki LT-Z400\/DR-Z400, and Arctic Cat DVX400. Features nickel-carbide cylinder with Factory Works porting, 12.2:1 forged domed piston, hard-anodized power valves, and full gasket set. Cylinder head not included.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body whitespace-normal break-words\"\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc space-y-2.5 pl-7\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e90mm Nickel-Carbide Cylinder – Factory Works porting\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eForged Domed Piston Kit – 12.2:1 compression, rings, pin, clips\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eHard-Anodized Power Valves – high-flow, non-OEM\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eAthena Top-End Gasket Set – head\/base gaskets, seals, hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body whitespace-normal break-words\"\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc space-y-2.5 pl-7\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e90mm stock bore — direct OEM replacement, no boring required\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eNickel-carbide plating — extreme durability, low friction\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eFactory Works porting — max airflow, race-tuned performance\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e12.2:1 forged piston — aggressive mid-top power\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eHard-anodized power valves — faster response, longer life\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eMade in Italy — pro-grade precision\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body whitespace-normal break-words\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc space-y-2.5 pl-7\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e2003–2006 Kawasaki KFX400\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e2003–2006 Kawasaki KLX400 \/ KLX400R\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e2003–2014 Suzuki LT-Z400 QuadSport Z \/ LE \/ SE\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e2000–2016 Suzuki DR-Z400 (all variants)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e2004–2008 Arctic Cat DVX400\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body whitespace-normal break-words\"\u003e\u003cstrong\u003eInstall Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc space-y-2.5 pl-7\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eReuses OEM cylinder head (not included)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eBolt-on install — no machining required\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eAdvanced install — top-end rebuild experience recommended\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eJetting\/fuel tuning may be required for optimal performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-300 my-2\"\u003e\n\u003cp class=\"font-claude-response-body whitespace-normal break-words\"\u003e \u003c\/p\u003e","brand":"Parts Unlimited","offers":[{"title":"Default Title","offer_id":47504514875617,"sku":"0931-0015","price":772.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1219\/2993\/files\/athena-90mm-stock-bore-race-cylinder-kit-kawasaki-kfx400-suzuki-lt-z400-dr-z400-20002016-7342194.png?v=1763958702","url":"https:\/\/dunegoonshop.com\/products\/athena-90mm-stock-bore-race-cylinder-kit-kawasaki-kfx400-suzuki-lt-z400-dr-z400-2000-2016","provider":"Dune Goons","version":"1.0","type":"link"}