{"product_id":"gy6-50cc-139qmb-cam-chain-tensioner-kit","title":"GY6 50cc (139QMB) Cam Chain Tensioner Kit","description":"\u003ch2\u003eCam Chain Tensioner Kit for 139QMB 50cc Scooters\u003c\/h2\u003e\u003cp\u003eThis tensioner kit suits the 139QMB 50cc four-stroke engine used in a range of scooters. Its job is to keep the timing chain at the right tension so the engine runs dependably. It is one of the useful \u003ca href=\"\/collections\/gy6-50cc-parts\"\u003eGY6 50cc scooter parts\u003c\/a\u003e for keeping your engine in good working order. The kit takes the place of the current adjuster hardware at the cylinder and controls chain movement while the engine runs.\u003c\/p\u003e\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\u003cp\u003eYou get the tensioner body, a spring, a cap, a gasket, an O-ring, and two mounting bolts. The parts are meant to operate together so the timing chain stays adjusted correctly. Installation is simple, and the components are built to last so the engine keeps performing consistently.\u003c\/p\u003e\u003ch3\u003eFitting and Swapping Out the Old Unit\u003c\/h3\u003e\u003cp\u003eThis tensioner is made for the 139QMB engine family only. Before you swap out your existing cam chain tensioner, confirm that the original unit and its mounting layout match this kit. If the engine starts making unusual sounds or shows a drop in performance, this component is worth inspecting.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Cam-chain tensioner \/ adjuster assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Family:\u003c\/strong\u003e 139QMB \/ QMB139 50cc four-stroke\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAppearance:\u003c\/strong\u003e Metal body with two mounting bolts; includes spring, cap, gasket, and O-ring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e Cam chain is not included.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e 139QMB \/ QMB139 50cc four-stroke GY6 engine, with the matching two-bolt cam-chain tensioner mount\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eCompatible with:\u003c\/p\u003e\u003cul\u003e\u003cli\u003e139QMB \/ QMB139 50cc four-stroke engine (two-bolt tensioner mount)\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSelection tip:\u003c\/strong\u003e Compare your original tensioner and its mounting layout with this kit, and confirm your engine is a 139QMB \/ QMB139 50cc four-stroke.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBrowse further:\u003c\/strong\u003e \u003ca href=\"\/collections\/gy6-50cc-parts\"\u003eGY6 50cc Scooter Parts (139QMB)\u003c\/a\u003e · \u003ca href=\"\/collections\/gy6-scooter-parts\"\u003eGY6 Scooter Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-cylinder-heads\"\u003eScooter Cylinder Heads \u0026amp; Valves\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-chains-sprockets\"\u003eScooter Chains \u0026amp; Sprockets\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-parts\"\u003eScooter Parts\u003c\/a\u003e\u003c\/p\u003e","brand":"Trend Times Toy Stores","offers":[{"title":"Default Title","offer_id":51138788294713,"sku":"TT-26750","price":3.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/cam-chain-tensioner-kit-for-gy6-50cc-139qmb-1.jpg?v=1794377794","url":"https:\/\/www.trendtimes.com\/products\/gy6-50cc-139qmb-cam-chain-tensioner-kit","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}