{"product_id":"athena-big-bore-kit-suzuki-dr-z400","title":"ATHENA - BIG BORE KIT - SUZUKI DR-Z400","description":"\u003ch2\u003eAthena 434cc Big Bore Kit for the Suzuki DR-Z400\u003c\/h2\u003e\n\u003cp data-start=\"201\" data-end=\"799\"\u003e\u003cbr\u003eThe Athena Big Bore Kit is a proven upgrade for riders who want more power and torque from their Suzuki DR-Z400. This complete kit increases displacement from 398cc to 434cc using a high-quality plated aluminum cylinder and a forged piston designed for durability and strong performance. The result is improved throttle response, stronger mid-range pull, and a noticeable increase in usable power without sacrificing reliability. This is a bolt-on solution with no cylinder re-plating required, making it a popular performance upgrade.\u003c\/p\u003e\n\u003ch4 data-start=\"806\" data-end=\"817\"\u003eFeatures:\u003c\/h4\u003e\n\u003cul data-start=\"819\" data-end=\"1205\"\u003e\n\u003cli data-start=\"819\" data-end=\"872\"\u003e\n\u003cp data-start=\"821\" data-end=\"872\"\u003eIncreases engine displacement from 398cc to 434cc\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"873\" data-end=\"937\"\u003e\n\u003cp data-start=\"875\" data-end=\"937\"\u003eIncludes new nickel-silicon carbide plated aluminum cylinder\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"938\" data-end=\"1004\"\u003e\n\u003cp data-start=\"940\" data-end=\"1004\"\u003eForged piston and rings designed for performance and longevity\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1005\" data-end=\"1062\"\u003e\n\u003cp data-start=\"1007\" data-end=\"1062\"\u003eBolt-on installation — no cylinder machining required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1063\" data-end=\"1105\"\u003e\n\u003cp data-start=\"1065\" data-end=\"1105\"\u003eOEM-level fit, finish, and reliability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1106\" data-end=\"1156\"\u003e\n\u003cp data-start=\"1108\" data-end=\"1156\"\u003eImproved power and torque across the rev range\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1157\" data-end=\"1205\"\u003e\n\u003cp data-start=\"1159\" data-end=\"1205\"\u003eDesigned and manufactured in Italy by Athena\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1157\" data-end=\"1205\"\u003eEasier installation as the stock crank remains. Splitting cases not needed\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFitment:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ch4\u003e2000–2024 – Suzuki DR-Z400S\u003c\/h4\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFitment Notes:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eKit comes with specially designed, high performance, hard anodized power valves. You cannot use the OEM valves.\u003c\/li\u003e\n\u003cli\u003eJetting: Because this kit significantly increases displacement and air intake, you must re-jet your carburetor to prevent the engine from running lean, which can cause overheating or engine failure.\u003c\/li\u003e\n\u003cli\u003eExhaust: To get the full potential gains of this kit, a high-flow aftermarket exhaust is highly recommended. Check your local laws for restrictions\u003c\/li\u003e\n\u003cli\u003eDoes not include cylinder head.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSpecifications:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,0,0\"\u003eBore Diameter: 94.00 mm (Stock is 90.00 mm)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,1,0\"\u003eDisplacement: 434.4 cc (Commonly referred to as 435cc or 440cc)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,2,0\"\u003eCompression Ratio: 12.3:1\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eStroke: Stock crank shaft is retained with a 62.6mm stroke\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4 style=\"text-align: center;\"\u003eReplacement gasket kit for the DR-Z400\u003cbr\u003eAthena Big Bore Kit:  \u003cspan style=\"color: rgb(215, 65, 35);\"\u003e\u003ca style=\"color: rgb(215, 65, 35);\" title=\"Athena replacement gasket set for Suzuki DR-Z400 Big Bore Kit available at TMBR MOTO.\" href=\"https:\/\/www.tmbrmoto.com\/products\/athena-gasket-kit-dr-z400-big-bore\"\u003e\u003cstrong\u003eCLICK HERE\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Athena","offers":[{"title":"Default Title","offer_id":47339736367269,"sku":"ATNA-BIG-BOR-DRZ400","price":999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/5720\/1317\/files\/ATHENA_DRZ400_BIG_BORE_1.jpg?v=1767640530","url":"https:\/\/www.tmbrmoto.com\/products\/athena-big-bore-kit-suzuki-dr-z400","provider":"TMBR MOTO","version":"1.0","type":"link"}