{"product_id":"ur3401-mxz-ultimate-racing-mxz-21-nitro-racing-engine-with-airmax-filter","title":"UR3401-MXZ Ultimate Racing MXZ .21 Nitro Racing Engine with AirMax Filter","description":"\u003cdiv class=\"container\"\u003e\n\u003cdiv itemscope=\"\" itemtype=\"http:\/\/schema.org\/Product\"\u003e\n\u003cdiv class=\"themevale_productDescription\"\u003e\n\u003cdiv class=\"productView-description\"\u003e\n\u003cdiv class=\"tabs-contents\"\u003e\n\u003cdiv class=\"tab-content is-active\" id=\"tab-description\"\u003e\n\u003cdiv class=\"toggle-content is-open\" id=\"tabDescription-content\" aria-hidden=\"false\"\u003e\n\u003ch2\u003e\u003cspan\u003eThis is the Ultimate MXZ 3 Transfers Long Stroke .21 Engine with the Ultimate Airmax Air Filter. This engine is manufactured by the prestigious Japanese brand O.S. Engines, with the following characteristics:\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eCooling Head\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eThe MXZ is equipped with the same cooling head as its predecessors. This 8-fin cooling head has a very low center of gravity and has been designed to focus most of the airflow directly to the glow plug. By cooling the glow plug we get a more stable carburetion and idle.\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eCarburetor\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eOnce again, the MXZ comes with the 21 J3 carburetor. Unlike the original OS carburetor, its high-speed needle holder was redesigned for better refrigeration of the fuel flow into the carburetor, lowering the temp of the carb, and consequently making it more stable with great idle stability, improved fuel mileage, and overall engine performance.\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eBesides this, the uniball joint of the carb slide was also modified with two stoppers instead of one. With this new modified design, you can easily adjust the angle of the uniball joint without having to disassemble the engine. This carb offers higher accuracy tuning, a very interesting advantage to experienced drivers.\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eCrankshaft\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eThe MXZ comes with a 14mm crankshaft with a teardrop-shaped opening and paste in the inlet for improved flow.\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eBearings\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eThe MXZ comes with the original OS steel bearing in the rear and Ultimate Racing double-sealed steel in the front.\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eVenturi\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eThe MXZ comes with the 6.5mm Ultimate Racing FLOWMAX venturi. With an innovative design, longer than the standard O.S. venturis and wider at the base, it ensures the inferior part of the venturi and the carburetor have exactly the same diameter. This new geometry improves fluid dynamics, providing extra power that allows the use of smaller venturis without decreasing power, and as a consequence, improves fuel mileage.\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eSleeve and Piston\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eThe sleeve with 3 inlet ports and an exhaust port guarantees low fuel consumption with very high but smooth and linear power. Both the sleeve and piston are made from a high-strength aluminum bar to improve durability.\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ch2\u003e\u003cspan\u003eDisplacement: 3.49 cc\u003c\/span\u003e\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003e\u003cspan\u003eBore: 16.27 mm\u003c\/span\u003e\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003e\u003cspan\u003eStroke: 16.80 mm\u003c\/span\u003e\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003e\u003cspan\u003eSleeve: 3 + 1 ports\u003c\/span\u003e\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003e\u003cspan\u003ePractical RPM range: 4,000 – 40,500 rpm\u003c\/span\u003e\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003e\u003cspan\u003eMax. power output: 2.55 hp at 34,000 rpm\u003c\/span\u003e\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003e\u003cspan\u003eWeight: 350 g\u003c\/span\u003e\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003e\u003cspan\u003eCrankshaft: 14 mm\u003c\/span\u003e\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003e\u003cspan\u003eCarburetor: 21 J3\u003c\/span\u003e\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003e\u003cspan\u003eGlow plug: P3 Turbo\u003c\/span\u003e\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003e\u003cspan\u003eExhaust Position: Rear\u003c\/span\u003e\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Ultimate Racing","offers":[{"title":"Default Title","offer_id":52803848995105,"sku":"UR3401-MXZ","price":424.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0681\/5766\/9665\/files\/UR3401-MXZ__42277.1734558815.jpg?v=1780682287","url":"https:\/\/997rcraceway.com\/products\/ur3401-mxz-ultimate-racing-mxz-21-nitro-racing-engine-with-airmax-filter","provider":"997 RC Raceway","version":"1.0","type":"link"}