{"product_id":"blue-line-complete-cylinder-kit-39mm-qmb139","title":"Blue Line 39mm 50cc Cylinder Kit - 139QMB GY6 Scooters","description":"\u003cp\u003eThis \u003cstrong\u003eBlue Line 39mm Cylinder Kit\u003c\/strong\u003e is a complete top-end rebuild for 50cc 4-stroke scooters running the 139QMB engine, the Chinese 50cc platform based on the Honda GY6 design. If your scooter is burning oil, losing compression, or just tired, this kit gives you a fresh cylinder, piston and rings plus the gaskets you need to put it back together in one order.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete top-end kit:\u003c\/strong\u003e Cylinder, piston, rings, wrist pin, circlips, dowel pins and gaskets in one box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStock 39mm bore:\u003c\/strong\u003e Standard 50cc replacement size for 139QMB engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect fit:\u003c\/strong\u003e Bolts on in place of the original cylinder with no modifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGaskets included:\u003c\/strong\u003e Head, base and intake gaskets come with the kit.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 1100-1501\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlternate part number:\u003c\/strong\u003e 151-257\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore:\u003c\/strong\u003e 39mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplacement:\u003c\/strong\u003e 50cc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall cylinder height:\u003c\/strong\u003e 70mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder sleeve outer diameter:\u003c\/strong\u003e 44.7mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine type:\u003c\/strong\u003e 4-stroke, air-cooled\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Cylinder, piston, piston rings, wrist pin, 2 circlips, 2 dowel pins, head gasket, base gasket, intake gasket\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 Family\u003c\/th\u003e\n\u003cth\u003eEngine Codes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e139QMB (GY6 50cc)\u003c\/td\u003e\n\u003ctd\u003e139QMB, 1P39QMB, YN139QMB, JJ1P39QMB, BD1P39QMB, BN139QMB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e139QMA (GY6 50cc)\u003c\/td\u003e\n\u003ctd\u003e139QMA, 1P39QMA-2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommon scooter brands\u003c\/td\u003e\n\u003ctd\u003eTao Tao, ZNEN, Peace Sports, Icebear, Jonway, Wolf, Baccio, Bintelli, BMS, Schwinn, SunL and other Chinese 50cc scooters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eCheck the engine code stamped on your scooter before ordering. Engines marked with a listed 139QMA or 139QMB code may use this part, but verify the 39mm bore and 44.7mm sleeve diameter against your original cylinder.\u003c\/p\u003e\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\u003cp\u003eClean all gasket surfaces thoroughly and install new gaskets. Follow a proper break-in period for the first few hundred miles.\u003c\/p\u003e","brand":"BLUE LINE","offers":[{"title":"Default Title","offer_id":67964667265345,"sku":"1100-1501","price":50.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-12391-0-1100-1501_cdcc0c86-03f9-410a-bc1f-3bddf4b658bf.jpg?v=1792558768","url":"https:\/\/azscooterparts.com\/products\/blue-line-complete-cylinder-kit-39mm-qmb139","provider":"AZScooterParts","version":"1.0","type":"link"}