{"product_id":"naraku-qmb139-adjustable-drive-sheave-137-30","title":"Naraku QMB139 Adjustable Drive Sheave","description":"\u003cp\u003eWith more linear slots, Naraku's Adjustable Drive Sheave (torque driver, secondary slider) improves acceleration and top speed in bikes with 50cc 139QMB engines.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eOverall Outer Diameter: 118.7mm\u003c\/li\u003e\n\u003cli\u003eInner Diameter: 33.5mm\u003c\/li\u003e\n\u003cli\u003eIncludes rear pulley, bearings, and nut\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e If installing on a CSC go, you'll need these \u003ca href=\"https:\/\/www.scooterworks.com\/products\/blue-line-clutch-slider-pin-set-of-3-qmb139?variant=46763461935384\" title=\"139QMB clutch slider pins \"\u003eclutch slider pins\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e\u003c\/p\u003e\u003ctable width=\"100%\" style=\"width: 99.9255%;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 47.7925%;\"\u003eCSC Bella Classic 50\u003c\/td\u003e\n\u003ctd style=\"width: 51.8301%;\"\u003eCSC go \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 47.7925%;\"\u003eCSC go MAX\u003c\/td\u003e\n\u003ctd style=\"width: 51.8301%;\"\u003eCSC Nitro Sport 50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 47.7925%;\"\u003eCSC Pug 50\u003c\/td\u003e\n\u003ctd style=\"width: 51.8301%;\"\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%;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 24.6905%;\"\u003e139QMA\u003c\/td\u003e\n\u003ctd style=\"width: 24.6905%;\"\u003e139QMB\u003c\/td\u003e\n\u003ctd style=\"width: 24.6905%;\"\u003e1P39QMB\u003c\/td\u003e\n\u003ctd style=\"width: 24.6905%;\"\u003e1P39QMA-2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 24.6905%;\"\u003eYN139QMB\u003c\/td\u003e\n\u003ctd style=\"width: 24.6905%;\"\u003eJJ1P39QMB\u003c\/td\u003e\n\u003ctd style=\"width: 24.6905%;\"\u003e139FMA-2\u003c\/td\u003e\n\u003ctd style=\"width: 24.6905%;\"\u003eBD1P39QMB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 24.6905%;\"\u003eBN139QMB\u003c\/td\u003e\n\u003ctd style=\"width: 24.6905%;\"\u003e147QMD\u003c\/td\u003e\n\u003ctd style=\"width: 24.6905%;\"\u003eOther QMA models\u003c\/td\u003e\n\u003ctd style=\"width: 24.6905%;\"\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\u003cspan style=\"font-size: 0.875rem;\"\u003e\u003cstrong\u003eAbout Naraku:\u003c\/strong\u003e NARAKU is a professional supplier of motorcycle parts from Taiwan. We’ve sold various motorcycle parts, scooter parts and accessories for more than 10 years. Our quality products are sold to Europe, Asia and America. We supply engine parts and accessories for modern scooters and mopeds. With our advanced technologies and the superb quality of our products, we can offer everything your ride needs.\u003c\/span\u003e\u003c\/p\u003e","brand":"Naraku","offers":[{"title":"Default Title","offer_id":50254669611288,"sku":"137-30","price":105.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/1728\/1816\/files\/450855_608dae91-cb1b-4410-926e-1c99ab2796d4.jpg?v=1748977243","url":"https:\/\/www.scooterworks.com\/products\/naraku-qmb139-adjustable-drive-sheave-137-30","provider":"Scooterworks USA, LLC","version":"1.0","type":"link"}