{"product_id":"kitaco-dohc-twin-cam-181cc-big-bore-kit-honda-grom-monkey-125","title":"Kitaco DOHC Twin Cam 181cc Big Bore Kit – Honda Grom \u0026 Monkey 125 (2014–2021)","description":"\u003cdiv style=\"background:#fff3cd;border-left:4px solid #ffc107;padding:12px 16px;margin:0 0 16px 0;\"\u003e\n\u003cstrong\u003e⚠️ California Residents – Do Not Order:\u003c\/strong\u003e This product is NOT legal for sale, installation, or use on a pollution-controlled vehicle in California. NOT CARB legal. \u003cstrong\u003eOrders from CA will be cancelled and refunded.\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f8d7da;border-left:4px solid #dc3545;padding:12px 16px;margin:0 0 20px 0;\"\u003e\n\u003cstrong\u003eFor Closed-Course Competition Use Only.\u003c\/strong\u003e Not intended for street use. The manufacture, sale, or installation of this product may be illegal under the Federal Clean Air Act (42 U.S.C. § 7522(a)(3)).\n\u003c\/div\u003e\n\n\u003ch2\u003eKitaco DOHC Twin Cam 181cc Big Bore Kit – The Ultimate Grom \u0026amp; Monkey 125 Engine Upgrade\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eKitaco DOHC 181cc Big Bore Kit\u003c\/strong\u003e is the pinnacle of performance engine upgrades for the Honda Grom and Monkey 125. Featuring a full \u003cstrong\u003eDual Overhead Cam (DOHC) cylinder head\u003c\/strong\u003e, forged internals, and a hard-plated 181cc cylinder, this kit delivers aggressive power output and torque that no SOHC big bore kit can match. If you want to stand out and make serious power, this is the build.\u003c\/p\u003e\n\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Overhead Cam (DOHC) Cylinder Head\u003c\/strong\u003e — optimized combustion chamber shape with high-efficiency port design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Camshafts\u003c\/strong\u003e — high-lift profiles for aggressive intake and exhaust timing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e181cc Forged Piston\u003c\/strong\u003e — high-compression forged construction for increased displacement and durability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e181cc Hard-Plated Aluminum Cylinder\u003c\/strong\u003e — precision-bored for longevity under race conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston rings, pin, clips \u0026amp; gasket kit\u003c\/strong\u003e — complete sealing hardware included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKitaco Forged H-Beam Crankshaft \u0026amp; H-Style Connecting Rod\u003c\/strong\u003e — handles sustained high-RPM demands\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReinforced Cam Chain\u003c\/strong\u003e — upgraded for reliability at elevated engine speeds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Valve Springs\u003c\/strong\u003e — prevents float at high RPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Cylinder Studs\u003c\/strong\u003e — secure head clamping under increased cylinder pressure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHi-Flow Fuel Injector\u003c\/strong\u003e — supports increased fuel demand of the 181cc displacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eEngine Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplacement:\u003c\/strong\u003e 181cc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore:\u003c\/strong\u003e φ63mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStroke:\u003c\/strong\u003e 57.9mm (stock)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 11.5:1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake Valves:\u003c\/strong\u003e 24.5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Valves:\u003c\/strong\u003e 21mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake Port:\u003c\/strong\u003e 28mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust Port:\u003c\/strong\u003e 23mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Requirement:\u003c\/strong\u003e Premium octane gasoline required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDecompressor:\u003c\/strong\u003e No decomp function built-in\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHonda Grom (MSX125) — 2014–2020, 4-speed \u003cstrong\u003eonly\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eHonda Monkey 125 — 2018–2021, 4-speed \u003cstrong\u003eonly\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eDoes NOT fit 2022+ Grom or 2022+ Monkey 125 (5-speed)\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Installation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional installation is \u003cstrong\u003estrongly recommended\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eEngine break-in procedure is required after installation\u003c\/li\u003e\n\u003cli\u003eAn \u003cstrong\u003eaftermarket fuel controller and custom tune\/autotune are required\u003c\/strong\u003e — fuel controller is NOT included\u003c\/li\u003e\n\u003cli\u003eThis kit converts your engine to a high-performance race configuration requiring additional maintenance attention\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty Disclaimer\u003c\/h3\u003e\n\u003cp\u003eNo warranty is stated or implied on race engine parts or bore-up kits due to the unusual stresses placed on these components and because we have no control over installation or use. Installation and use of this product constitutes full assumption of responsibility by the user.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 215-1432900\u003c\/p\u003e","brand":"Kitaco","offers":[{"title":"Default Title","offer_id":43935630852337,"sku":"215-1432900","price":2668.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0626\/1348\/7857\/files\/kitaco-engine-default-title-kitaco-twin-cam-dohc-181cc-big-bore-performance-kit-215-1432900-30852337-32041906143473.webp?v=1773629624","url":"https:\/\/howlingmoto.com\/products\/kitaco-dohc-twin-cam-181cc-big-bore-kit-honda-grom-monkey-125","provider":"Howling Moto","version":"1.0","type":"link"}