{"product_id":"driveshaft-gy50-qmb139","title":"Blue Line 139QMB Gearbox Output Drive Shaft Axle - 155mm","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eThis \u003cstrong\u003eBlue Line 155 mm gearbox output drive shaft\u003c\/strong\u003e replaces a worn or damaged shaft in the final-drive gearbox of compatible single-shock 139QMB scooters, helping get your scooter back on the road. Its 16-tooth gear, 22-spline wheel connection, and M10 × 1.25 threaded end provide the key specifications to match against your original shaft.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGearbox output replacement:\u003c\/strong\u003e Transfers drive from the final-drive gearbox to the rear wheel on matching applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-shock configuration:\u003c\/strong\u003e For 139QMB scooters using the 155 mm output-shaft setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e16-tooth gear:\u003c\/strong\u003e Match the gear tooth count and profile to your existing gearbox.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e22-spline connection:\u003c\/strong\u003e Provides the rear-wheel interface for a matching wheel hub.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreaded wheel end:\u003c\/strong\u003e M10 × 1.25 thread specification for matching retaining hardware.\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 1100-1323\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart type:\u003c\/strong\u003e Gearbox output drive shaft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall length:\u003c\/strong\u003e 155 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel splines:\u003c\/strong\u003e 22\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGear teeth:\u003c\/strong\u003e 16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread size:\u003c\/strong\u003e M10 × 1.25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Matching single-shock 139QMB scooters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eRequired configuration\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eChicago Scooter Company go. and go. MAX\u003c\/td\u003e\n\u003ctd\u003eSingle-shock models using a matching 155 mm gearbox output shaft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChinese 139QMB-based 50\/80cc scooters\u003c\/td\u003e\n\u003ctd\u003eSingle-shock configuration, 155 mm shaft, 22 wheel splines, 16 gear teeth and M10 × 1.25 threads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelated engine codes\u003c\/td\u003e\n\u003ctd\u003e139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD, and other QMA\/QMB configurations only when the specified shaft and suspension setup match\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eCompare overall length, gear teeth and profile, wheel splines, thread size, bearing and seal journals, and shoulder positions with your original shaft before ordering. This is the 155 mm shaft for the single-shock configuration, not a universal replacement for every 139QMB gearbox. Engine code alone does not establish fitment.\u003c\/p\u003e\u003cp\u003eInspect the mating gears, bearings, seals, and wheel-hub splines during replacement. Assemble and refill the gearbox according to the vehicle manufacturer's service instructions.\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=154\"\u003eGO MAX GEAR BOX\u003c\/a\u003e \u003cspan\u003eCallout 13\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=3\"\u003eQMB139 GEAR BOX\u003c\/a\u003e \u003cspan\u003eCallout 13\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Blue Line","offers":[{"title":"Default Title","offer_id":67964558311745,"sku":"1100-1323","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-6852-0-1100-1323_4355dc90-1e27-4598-b5fa-8ccdf2bbbaac.jpg?v=1792557843","url":"https:\/\/azscooterparts.com\/products\/driveshaft-gy50-qmb139","provider":"AZScooterParts","version":"1.0","type":"link"}