{"product_id":"for-gy6-150cc-57-4mm-big-bore-kit-set-cylinder-head-piston-gasket-set-qmj157","title":"For GY6 150cc 57.4mm Big Bore Kit Set Cylinder Head Piston Gasket Set QMJ157","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThis big bore kit set is an aftermarket replacement part intended for GY6 150cc engines. The set includes a 57.4mm cylinder, cylinder head, piston, and gasket set, and it is listed for the QMJ157 application. It provides the major top-end components commonly replaced together during an engine rebuild or displacement change.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAftermarket big bore kit set for GY6 150cc engines\u003c\/li\u003e\n\u003cli\u003e57.4mm cylinder specification as listed\u003c\/li\u003e\n\u003cli\u003eIncludes cylinder head, piston, and gasket set\u003c\/li\u003e\n\u003cli\u003eListed for the QMJ157 application\u003c\/li\u003e\n\u003cli\u003eSet-style offering for top-end rebuild components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility \u0026amp; Fitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBig bore kit set for GY6 150cc\u003c\/li\u003e\n\u003cli\u003eListed application for QMJ157\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eProduct Type: Big bore kit set\u003c\/li\u003e\n\u003cli\u003eBore Size: 57.4mm\u003c\/li\u003e\n\u003cli\u003eIncluded Components: Cylinder Head, Piston, Gasket Set\u003c\/li\u003e\n\u003cli\u003eModel Application: QMJ157\u003c\/li\u003e\n\u003cli\u003eEngine Application: GY6 150cc\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What is a big bore kit set used for? \u003cstrong\u003eA:\u003c\/strong\u003e A big bore kit set is used when rebuilding or increasing the displacement of a small engine, replacing the cylinder along with the matching piston, cylinder head, and gaskets as a coordinated top-end assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e How do I verify this kit fits my engine? \u003cstrong\u003eA:\u003c\/strong\u003e Confirm your engine is a GY6 150cc with a QMJ157 listing, then check the 57.4mm bore size and compare the included cylinder head, piston, and gasket set against your existing parts before purchase.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eThis is an aftermarket replacement part for the referenced application and is not represented as genuine or original equipment. Compatibility may vary by model, production date, serial number, or existing part number. Verify fitment before purchase.\u003c\/em\u003e\u003c\/p\u003e","brand":"RivetOak","offers":[{"title":"Default Title","offer_id":67602990628964,"sku":"ZZ3P01098","price":142.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0804\/6647\/7156\/files\/s-l1600_72a2fdba-81d1-4950-bbf2-4a38c19c5860.jpg?v=1791017598","url":"https:\/\/www.rivetoak.com\/products\/for-gy6-150cc-57-4mm-big-bore-kit-set-cylinder-head-piston-gasket-set-qmj157","provider":"RivetOak","version":"1.0","type":"link"}