{"product_id":"blue-line-gy6-81cc-50mm-cylinder-gasket-kit","title":"Blue Line 50mm Big Bore Gasket Kit - GY6 139QMB 81cc","description":"\u003cp\u003eThis \u003cstrong\u003eBlue Line Big Bore Cylinder Gasket Kit\u003c\/strong\u003e is the gasket set for 50mm-bore big bore kits on GY6 139QMB \/ 139QMA 50cc scooter engines. On the stock 139QMB stroke, a 50mm bore brings displacement to about 81cc. Use it to install a new kit, or to reseal an existing one after a rebuild or a blown head gasket.\u003c\/p\u003e\u003cp\u003eThis product is intended for off-road use only. This product is not intended for use on public roads or land.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSized for 50mm bore:\u003c\/strong\u003e Matches 81cc big bore cylinders on the 139QMB.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoated head gasket:\u003c\/strong\u003e Black coated head gasket seals combustion pressure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase gasket:\u003c\/strong\u003e Paper cylinder base gasket seals the cylinder to the crankcase.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake gasket included:\u003c\/strong\u003e Seals the intake manifold to the head.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 1100-1574\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore size:\u003c\/strong\u003e 50mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplacement:\u003c\/strong\u003e 81cc (with 139QMB stroke)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Head gasket, cylinder base gasket, intake manifold gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e GY6 139QMB \/ 139QMA 50cc 4-stroke\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Blue Line\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eKit Size\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003eGY6 139QMB \/ 139QMA (50cc 4-stroke)\u003c\/td\u003e\n\u003ctd\u003e50mm bore, 81cc big bore kits\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e139QMB engines are based on Honda's GY6 design and are used by many Chinese 50cc scooter brands. Check the engine code on your engine case and confirm that your cylinder bore is 50mm before ordering. This set won't fit the stock 39mm bore or 52mm+ kits.\u003c\/p\u003e\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\u003cp\u003eClean all mating surfaces thoroughly, install the gaskets dry, and torque the head nuts evenly in a cross pattern to spec.\u003c\/p\u003e","brand":"Blue Line","offers":[{"title":"Default Title","offer_id":67964786442561,"sku":"1100-1574","price":6.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/1100-1574_38aac89c-139b-4ea4-95d0-a15d531ff7f9.webp?v=1792993071","url":"https:\/\/azscooterparts.com\/products\/blue-line-gy6-81cc-50mm-cylinder-gasket-kit","provider":"AZScooterParts","version":"1.0","type":"link"}