{"product_id":"180cc-gy6-big-bore-kit-63mm-forged-piston","title":"180cc GY6 Big Bore Kit - 63mm Forged Piston","description":"\u003ch2\u003e180cc Big Bore Kit for GY6 125cc and 150cc Engines\u003c\/h2\u003e\u003cp\u003eThis 63 mm Forged Piston Big Bore Kit is designed to improve the performance of compatible GY6 125cc and 150cc four-stroke engines. By increasing the displacement to approximately 180cc, this kit provides a solid foundation for better torque and acceleration. It is one of the \u003ca href=\"\/collections\/gy6-scooter-parts\"\u003eGY6 scooter parts\u003c\/a\u003e that can significantly boost your engine's capabilities, ensuring a more powerful ride.\u003c\/p\u003e\u003ch3\u003eKey Components\u003c\/h3\u003e\u003cp\u003eThe kit includes a finned cylinder that aids in cooling, along with a forged piston, piston rings, a wrist pin, retaining clips, and necessary gaskets for installation. The finned design helps effectively dissipate heat, which is important for maintaining engine performance. With these components, you can expect a noticeable increase in power delivery.\u003c\/p\u003e\u003ch3\u003eInstallation Requirements\u003c\/h3\u003e\u003cp\u003eInstalling this big bore kit requires modifications to the crankcase, making it a more involved process than a simple drop-in replacement. It's important to have the right tools, such as an engine case boring tool, to complete the installation correctly. Ensure that you are prepared for the necessary adjustments to accommodate the new cylinder and piston.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine application:\u003c\/strong\u003e Compatible with GY6 125cc \/ 150cc four-stroke engines; not for QMK or 169cc engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore:\u003c\/strong\u003e 63 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplacement:\u003c\/strong\u003e Approximately 180cc, depending on crankshaft stroke\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter sleeve diameter:\u003c\/strong\u003e 64.9 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder height:\u003c\/strong\u003e 90 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWrist pin:\u003c\/strong\u003e 15 mm diameter × 48 mm length\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder-stud spacing:\u003c\/strong\u003e 54 × 54 mm center-to-center\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eThis big bore kit is designed for specific 125cc and 150cc four-stroke engines. Ensure compatibility with your engine model by verifying the specifications below:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e157QMJ\u003c\/li\u003e\n\u003cli\u003e152QMI\u003c\/li\u003e\n\u003cli\u003eYN1P57QMJ\u003c\/li\u003e\n\u003cli\u003eJJ157QMJ\u003c\/li\u003e\n\u003cli\u003e1P57QMJ\u003c\/li\u003e\n\u003cli\u003eBN157QMJ\u003c\/li\u003e\n\u003cli\u003e1P52FMI\u003c\/li\u003e\n\u003cli\u003e154FMI\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eNot sure it fits? Contact us with your scooter's make, model and year and we'll confirm the fit before you order.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShop more:\u003c\/strong\u003e \u003ca href=\"\/collections\/gy6-scooter-parts\"\u003eGY6 Scooter Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/chinese-scooter-parts\"\u003eChinese Scooter Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-cylinder-kits\"\u003eScooter Big Bore \u0026amp; Cylinder Kits\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-pistons-rings\"\u003eScooter Pistons \u0026amp; Piston Rings\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-parts\"\u003eScooter Parts\u003c\/a\u003e\u003c\/p\u003e","brand":"Magic Cars","offers":[{"title":"Default Title","offer_id":52795131986151,"sku":"25-901419","price":222.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2245\/9711\/files\/180cc-gy6-big-bore-kit-63mm-forged-piston-1.jpg?v=1791583868","url":"https:\/\/www.magiccars.com\/products\/180cc-gy6-big-bore-kit-63mm-forged-piston","provider":"MagicCars","version":"1.0","type":"link"}