{"product_id":"gy6-50cc-139qmb-rocker-arm-assembly-type-2-69mm","title":"GY6 50cc (139QMB) Rocker Arm Assembly (Type 2, 69mm)","description":"\u003ch2\u003eGY6 50cc and 80cc Rocker Arm Assembly for Type-2 139QMB Engines\u003c\/h2\u003e\u003cp\u003eThis rocker arm assembly is made for Type-2 139QMB engines and works with a 69mm valve stem and a taller cylinder head. It helps the valve train move correctly, which keeps your engine's valves working as they should. You'll find it among \u003ca href=\"\/collections\/gy6-50cc-parts\"\u003eGY6 50cc scooter parts\u003c\/a\u003e, and it is built to match several engine models. Whether you're swapping out a worn piece or looking to keep your engine running well, this assembly is a dependable option.\u003c\/p\u003e\u003ch3\u003eBuild and Fit Details\u003c\/h3\u003e\u003cp\u003eThe assembly stands 26mm tall, so it lines up directly with engines that use 69mm valves. It is designed around the Type-2 139QMB layout, allowing it to sit properly in your scooter's engine. If your engine code includes \"QM\" or \"FM,\" it should be a suitable match.\u003c\/p\u003e\u003ch3\u003eSigns It May Be Time to Replace the Rocker Arm Assembly\u003c\/h3\u003e\u003cp\u003eThink about replacing the rocker arm assembly if your scooter loses performance or the engine shows visible wear. Checking this part regularly can help you avoid larger engine issues and keep your ride steady. Odd noises or a noticeable drop in power are good signs that a new one may be needed.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 26mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Length:\u003c\/strong\u003e 69mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e GY6 139QMB Type-2 engines with 69mm valves (50cc and 80cc, taller head)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGY6 139QMB Type-2 engines (69mm valve stem, taller head)\u003c\/li\u003e\n\u003cli\u003eEngine codes: 139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD\u003c\/li\u003e\n\u003cli\u003eOther QMA and QMB models (Type-2)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Confirm the valve stem length is 69mm. Type-1 engines use a 64mm valve and a shorter head, so this part will not fit them.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBrowse related parts:\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-parts\"\u003eScooter Parts\u003c\/a\u003e\u003c\/p\u003e","brand":"Trend Times Toy Stores","offers":[{"title":"Default Title","offer_id":51138219475001,"sku":"TT-24914","price":18.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/rocker-arm-assembly-type-2-69mm-for-gy6-50cc-139qmb-1.jpg?v=1794372835","url":"https:\/\/www.trendtimes.com\/products\/gy6-50cc-139qmb-rocker-arm-assembly-type-2-69mm","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}