{"product_id":"gy6-50cc-139qmb-81cc-50mm-big-bore-gasket-kit","title":"GY6 50cc (139QMB) 81cc 50mm Big Bore Gasket Kit","description":"\u003ch2\u003e81cc Big Bore Gasket Kit for GY6 50cc Engines\u003c\/h2\u003e\u003cp\u003eThis gasket set is made for 50mm bore kits fitted to GY6 139QMB and 139QMA 50cc scooter engines. Moving to a 50mm bore raises the displacement to roughly 81cc, so this kit suits anyone replacing gaskets during a rebuild or repair. It is one of the \u003ca href=\"\/collections\/gy6-50cc-parts\"\u003eGY6 50cc scooter parts\u003c\/a\u003e that helps maintain a proper seal and dependable running in your engine.\u003c\/p\u003e\u003ch3\u003eWhat Is Included\u003c\/h3\u003e\u003cp\u003eThe set contains a coated head gasket to hold combustion pressure in place, giving the engine a sound seal. A paper base gasket is also supplied to form a snug join between the cylinder and the crankcase. Rounding out the kit is an intake gasket, which fits between the intake manifold and the cylinder head to keep airflow steady.\u003c\/p\u003e\u003ch3\u003eFitting Tips\u003c\/h3\u003e\u003cp\u003eBefore installing, wipe down every mating surface so it is clean. The gaskets are generally meant to go on dry, and the head nuts should be tightened evenly in a cross pattern to the specified torque. Doing this helps each gasket seat properly and keeps the seal intact.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\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\u003eFits:\u003c\/strong\u003e GY6 139QMB \/ 139QMA 50cc 4-stroke engines with a 50mm big bore kit (81cc)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits:\u003c\/p\u003e\u003cul\u003e\u003cli\u003eGY6 139QMB \/ 139QMA 50cc 4-stroke engine (with 50mm bore, 81cc big bore kit)\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Check that your cylinder bore measures 50mm. This set will not fit the stock 39mm bore or kits of 52mm and above.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShop more:\u003c\/strong\u003e \u003ca href=\"\/collections\/gy6-50cc-parts\"\u003eGY6 50cc Scooter Parts (139QMB)\u003c\/a\u003e · \u003ca href=\"\/collections\/gy6-scooter-parts\"\u003eGY6 Scooter Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-cylinder-kits\"\u003eScooter Big Bore \u0026amp; Cylinder Kits\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-gaskets-seals\"\u003eScooter Gaskets \u0026amp; Seals\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-parts\"\u003eScooter Parts\u003c\/a\u003e\u003c\/p\u003e","brand":"Trend Times Toy Stores","offers":[{"title":"Default Title","offer_id":51134421860409,"sku":"TT-15429","price":4.98,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/50mm-big-bore-gasket-kit-for-gy6-50cc-139qmb-81cc-1.webp?v=1794343682","url":"https:\/\/www.trendtimes.com\/products\/gy6-50cc-139qmb-81cc-50mm-big-bore-gasket-kit","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}