{"product_id":"variator-nut-m12-csc-go-qmb139-scooters","title":"Blue Line Variator Nut M12x1.25 - 139QMB Scooters","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eThis \u003cstrong\u003eBlue Line variator nut\u003c\/strong\u003e is an M12 × 1.25 replacement for a broad range of Chinese 139QMB-based 50cc and 80cc scooter applications. It secures the front variator assembly, making it a handy replacement during CVT service when the original nut is missing or damaged. The hex head and integrated smooth-base flange match setups requiring a 23.5 mm overall nut diameter and 8.85 mm height.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad scooter compatibility:\u003c\/strong\u003e Suitable for matching 139QMB-based 50cc and 80cc configurations across multiple scooter brands.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM12 × 1.25 thread:\u003c\/strong\u003e Specific thread diameter and pitch for compatible variator-retaining applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmooth-base flange:\u003c\/strong\u003e Integrated flange provides the required seating surface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHex-head design:\u003c\/strong\u003e Allows socket engagement during installation and removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCSC fitment:\u003c\/strong\u003e Also fits the OEM variator application on CSC go., go. MAX, Pug 50, and Nitro Sport 50 scooters.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Blue Line\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 1200-4003\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart type:\u003c\/strong\u003e Variator flange nut\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread size:\u003c\/strong\u003e M12 × 1.25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall outer diameter:\u003c\/strong\u003e 23.5 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 8.85 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase:\u003c\/strong\u003e Smooth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 nut\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003eFor Chinese 139QMB-based 50cc and 80cc scooter configurations that use an M12 × 1.25 variator nut with matching flange seating and clearance. Fitment is based on the installed engine and variator hardware, rather than the badge on the scooter.\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eFitment details\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eChinese 50cc\/80cc engine configurations\u003c\/td\u003e\n\u003ctd\u003e139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, and 147QMD configurations using the matching nut specification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOther QMA\/QMB configurations\u003c\/td\u003e\n\u003ctd\u003eConfirm M12 × 1.25 thread, 23.5 mm overall nut diameter, 8.85 mm height, and smooth flange seating against the original\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChicago Scooter Company\u003c\/td\u003e\n\u003ctd\u003ego., go. MAX, Pug 50, Nitro Sport 50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eMatch the original nut and crankshaft thread before ordering. Install to the vehicle manufacturer's torque specification with the variator components fully seated.\u003c\/p\u003e\u003ch2\u003eProduct Diagrams\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=266\"\u003eGO MAX TRANSMISSION\u003c\/a\u003e \u003cspan\u003eCallout 4\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=27\"\u003eBELLA CLASSIC 50 TRANSMISSION\u003c\/a\u003e \u003cspan\u003eCallout 14\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Blue Line","offers":[{"title":"Default Title","offer_id":67964648915265,"sku":"1200-4003","price":1.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-9390-0-1200-4003_3b5c0bcb-8cba-4b32-9ce2-9b5e347c384d.jpg?v=1792558045","url":"https:\/\/azscooterparts.com\/products\/variator-nut-m12-csc-go-qmb139-scooters","provider":"AZScooterParts","version":"1.0","type":"link"}