{"product_id":"gy6s-gy650-01052-taida-52mm-88cc-qmb139-cylinder-set-54mm-spacing-with-cast-piston","title":"TAIDA 52mm (88cc) QMB139 CYLINDER SET (54mm SPACING) WITH CAST PISTON","description":"\u003ch2\u003eTaida 52mm Big Bore Kit (88cc) for 49cc\/50cc GY6 139QMB Engines\u003c\/h2\u003e \u003cp\u003eIncrease the performance of your 49cc\/50cc scooter with the \u003cstrong\u003eTaida 52mm Big Bore Kit\u003c\/strong\u003e, engineered in \u003cstrong\u003eTaiwan\u003c\/strong\u003e for riders looking for exceptional reliability and power. Featuring a premium \u003cstrong\u003ecast-iron cylinder\u003c\/strong\u003e and \u003cstrong\u003ecast aluminum piston\u003c\/strong\u003e, this kit is designed to deliver increased torque, stronger acceleration, improved hill-climbing ability, and greater overall engine performance while maintaining excellent durability.\u003c\/p\u003e \u003cp\u003eWhen installed with a \u003cstrong\u003estock 41.4mm crankshaft\u003c\/strong\u003e, this kit increases engine displacement to approximately \u003cstrong\u003e88cc\u003c\/strong\u003e. Pair it with a \u003cstrong\u003e44mm stroker crankshaft\u003c\/strong\u003e to achieve approximately \u003cstrong\u003e93.4cc\u003c\/strong\u003e.\u003c\/p\u003e \u003ch3\u003eFeatures\u003c\/h3\u003e \u003cul\u003e \u003cli\u003ePremium Taida cast-iron cylinder for maximum durability and long service life\u003c\/li\u003e \u003cli\u003ePrecision-machined cast aluminum piston\u003c\/li\u003e \u003cli\u003e52mm big bore design for significant horsepower and torque gains\u003c\/li\u003e \u003cli\u003eExcellent heat resistance for daily riding and performance applications\u003c\/li\u003e \u003cli\u003ePrecision-honed cylinder walls promote proper ring seating and reduced friction\u003c\/li\u003e \u003cli\u003eManufactured in Taiwan for outstanding quality and reliability\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eImportant Installation Information\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eBefore purchasing, measure your engine case with a caliper.\u003c\/li\u003e \u003cli\u003eCylinder sleeve outside diameter measures \u003cstrong\u003e54.45mm\u003c\/strong\u003e.\u003c\/li\u003e \u003cli\u003eEngine case opening must provide a \u003cstrong\u003eminimum 54.5mm clearance\u003c\/strong\u003e.\u003c\/li\u003e \u003cli\u003eIf your crankcase opening is smaller, \u003cstrong\u003eengine case boring\/machining will be required\u003c\/strong\u003e.\u003c\/li\u003e \u003cli\u003eProfessional installation is recommended.\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eSpecifications\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eCylinder Bore: \u003cstrong\u003e52mm\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003eEngine Displacement: \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e88cc\u003c\/strong\u003e with 41.4mm stock crankshaft\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e93.4cc\u003c\/strong\u003e with 44mm stroker crankshaft\u003c\/li\u003e \u003c\/ul\u003e \u003c\/li\u003e \u003cli\u003eCylinder Material: Cast Iron\u003c\/li\u003e \u003cli\u003ePiston Material: Cast Aluminum\u003c\/li\u003e \u003cli\u003eOuter Sleeve Diameter: \u003cstrong\u003e54.45mm\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003eCylinder Height (without sleeve): \u003cstrong\u003e53mm\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003eOverall Height (with sleeve): \u003cstrong\u003e70.3mm\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003eCountry of Manufacture: Taiwan\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003ePackage Includes\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e(1) 52mm Cast-Iron Cylinder\u003c\/li\u003e \u003cli\u003e(1) Cast Aluminum Piston\u003c\/li\u003e \u003cli\u003e(5) 52mm Piston Rings\u003c\/li\u003e \u003cli\u003e(1) Wrist Pin\u003c\/li\u003e \u003cli\u003e(2) Circlips\u003c\/li\u003e \u003cli\u003eBase Gasket\u003c\/li\u003e \u003cli\u003eSteel Head Gasket\u003c\/li\u003e \u003cli\u003eCam Chain Tensioner Gasket\u003c\/li\u003e \u003cli\u003eTaida Decal\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eCompatible Components\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eFits 50mm Cylinder Stud Spacing (70.5mm Diagonal)\u003c\/li\u003e \u003cli\u003eFits 50-52mm 2-Valve Cylinder Heads\u003c\/li\u003e \u003cli\u003eFits 41.4mm and 44mm Crankshafts\u003c\/li\u003e \u003cli\u003eFits 8x14mm Dowel Pins\u003c\/li\u003e \u003cli\u003eFits 64mm or 69mm Rocker Arm Assemblies\u003c\/li\u003e \u003cli\u003eIntake Studs: M6\u003c\/li\u003e \u003cli\u003eExhaust Studs: M6\u003c\/li\u003e \u003cli\u003eCylinder Studs: 168mm \/ 176mm\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eVehicle Compatibility\u003c\/h3\u003e \u003cp\u003eFits most \u003cstrong\u003eGY6 50cc \/ 139QMB 4-stroke engines\u003c\/strong\u003e, including many Chinese scooters and mopeds such as:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eTaoTao\u003c\/li\u003e \u003cli\u003eIce Bear\u003c\/li\u003e \u003cli\u003eWolf\u003c\/li\u003e \u003cli\u003eRoketa\u003c\/li\u003e \u003cli\u003eTank\u003c\/li\u003e \u003cli\u003eSUNL\u003c\/li\u003e \u003cli\u003eBaja\u003c\/li\u003e \u003cli\u003eBMS (Boreem)\u003c\/li\u003e \u003cli\u003ePanterra\u003c\/li\u003e \u003cli\u003eQLink\u003c\/li\u003e \u003cli\u003eQingqi\u003c\/li\u003e \u003cli\u003eKymco 4-Stroke 50cc Models\u003c\/li\u003e \u003cli\u003eLance\u003c\/li\u003e \u003cli\u003eSYM\u003c\/li\u003e \u003cli\u003eAnd many other scooters using the \u003cstrong\u003e139QMB engine platform\u003c\/strong\u003e with matching dimensions.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003ePlease verify all measurements before ordering.\u003c\/strong\u003e This kit is designed for \u003cstrong\u003e139QMB\/GY6 50cc engines\u003c\/strong\u003e and fitment should always be confirmed before installation.\u003c\/p\u003e","brand":"ChinesePartsPro","offers":[{"title":"Default Title","offer_id":53556416119096,"sku":"GY650-01052","price":97.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0011\/8898\/6997\/files\/DSCN8369__21089.1566246265.jpg?v=1792868319","url":"https:\/\/www.chinesepartspro.com\/products\/gy6s-gy650-01052-taida-52mm-88cc-qmb139-cylinder-set-54mm-spacing-with-cast-piston","provider":"ChinesePartsPro","version":"1.0","type":"link"}