{"product_id":"cylinder-head-valve-assembly-csc-go-qmb139-scooters-1100-4063","title":"Cylinder Head \u0026 Valve Assembly; CSC go., 139QMB Scooters","description":"\u003cp\u003eThis assembled PAIR-style cylinder head fits CSC go, go MAX and Pug scooters and bikes running 50cc 4-stroke 139QMB engines. Pulsed Secondary Air Injection System (PAIR) is an emissions control system used to lower hydrocarbon (HC) and carbon monoxide (CO) emissions by allowing air into the exhaust flow. \u003c\/p\u003e\u003cp\u003eOriginal Parts For Scooters SKU 151-240\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eIntake Port Diameter: 17mm  \u003c\/li\u003e\n\u003cli\u003eExhaust Port Diameter: 17mm\u003c\/li\u003e\n\u003cli\u003eValve Length: 69mm  \u003c\/li\u003e\n\u003cli\u003eEmission Control System: PAIR\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility: \u003c\/strong\u003e\u003c\/p\u003e\u003ctable width=\"100%\" style=\"width: 100%;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 48.8586%;\"\u003eChicago Scooter Company go\u003c\/td\u003e\n\u003ctd style=\"width: 50.9269%;\"\u003eChicago Scooter Company go MAX \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 48.8586%;\"\u003eChicago Scooter Company Pug50\u003c\/td\u003e\n\u003ctd style=\"width: 50.9269%;\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003e139QMB-based 50cc \/ 80cc engines with the following engine codes:\u003c\/strong\u003e\u003c\/p\u003e\u003ctable width=\"463\" height=\"100\" style=\"width: 87.0908%; height: 81.2px;\"\u003e\u003ctbody\u003e\n\u003ctr style=\"height: 20.325px;\"\u003e\n\u003ctd style=\"width: 24.6905%; height: 20.325px;\"\u003e139QMA\u003c\/td\u003e\n\u003ctd style=\"width: 24.6905%; height: 20.325px;\"\u003e139QMB\u003c\/td\u003e\n\u003ctd style=\"width: 24.6905%; height: 20.325px;\"\u003e1P39QMB\u003c\/td\u003e\n\u003ctd style=\"width: 24.6905%; height: 20.325px;\"\u003e1P39QMA-2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20.325px;\"\u003e\n\u003ctd style=\"width: 24.6905%; height: 20.325px;\"\u003eYN139QMB\u003c\/td\u003e\n\u003ctd style=\"width: 24.6905%; height: 20.325px;\"\u003eJJ1P39QMB\u003c\/td\u003e\n\u003ctd style=\"width: 24.6905%; height: 20.325px;\"\u003e139FMA-2\u003c\/td\u003e\n\u003ctd style=\"width: 24.6905%; height: 20.325px;\"\u003eBD1P39QMB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 40.55px;\"\u003e\n\u003ctd style=\"width: 24.6905%; height: 40.55px;\"\u003eBN139QMB\u003c\/td\u003e\n\u003ctd style=\"width: 24.6905%; height: 40.55px;\"\u003e147QMD\u003c\/td\u003e\n\u003ctd style=\"width: 24.6905%; height: 40.55px;\"\u003eOther QMA models\u003c\/td\u003e\n\u003ctd style=\"width: 24.6905%; height: 40.55px;\"\u003eOther QMB models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eDon't see your engine listed? If the engine code includes \"QM\" or \"FM\", this product is compatible with your vehicle.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAbout CSC: \u003c\/strong\u003eChicago Scooter Company embodies the spirit of urban mobility with its innovative and stylish lineup of scooters. Designed for city living, their scooters blend functionality, reliability, and modern design, making them the perfect choice for navigating busy streets. Experience the freedom of effortless commuting and explore the city in style with Chicago Scooter Company.\u003c\/p\u003e","brand":"Chicago Scooter Company","offers":[{"title":"Default Title","offer_id":46759955366168,"sku":"1100-4063","price":68.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/1728\/1816\/products\/1100-4063_7cf683cb-a7d6-437d-94af-b6a5b3cde90c.jpg?v=1695306101","url":"https:\/\/www.scooterworks.com\/products\/cylinder-head-valve-assembly-csc-go-qmb139-scooters-1100-4063","provider":"Scooterworks USA, LLC","version":"1.0","type":"link"}