{"product_id":"starter-clutch-gear-4-stroke-gy6-49cc-50cc-139qmb-scooter-moped-kart-atv","title":"Starter Clutch Gear 4-stroke GY6 49cc 50cc 139QMB Scooter Moped Kart ATV","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThis starter clutch gear is designed for 4-stroke GY6 49cc and 50cc 139QMB engines used in scooters, mopeds, karts, and ATVs. It serves as a replacement component in the starting drive system that helps transfer starter motor rotation to the engine. Confirm your engine code and gear specifications before ordering.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eStarter clutch gear for 4-stroke GY6 engines\u003c\/li\u003e\n\u003cli\u003eSuited to 49cc and 50cc displacements\u003c\/li\u003e\n\u003cli\u003eApplication reference 139QMB\u003c\/li\u003e\n\u003cli\u003eIntended for scooter, moped, kart, and ATV use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility \u0026amp; Fitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFor 4-stroke GY6 49cc engines\u003c\/li\u003e\n\u003cli\u003eFor 4-stroke GY6 50cc engines\u003c\/li\u003e\n\u003cli\u003eFor 139QMB applications\u003c\/li\u003e\n\u003cli\u003eFor scooters, mopeds, karts, and ATVs using this engine family\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eProduct Type: Starter Clutch Gear\u003c\/li\u003e\n\u003cli\u003eEngine Type: 4-stroke\u003c\/li\u003e\n\u003cli\u003eEngine Family: GY6\u003c\/li\u003e\n\u003cli\u003eDisplacement: 49cc, 50cc\u003c\/li\u003e\n\u003cli\u003eEngine Code: 139QMB\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What is the purpose of this part? \u003cstrong\u003eA:\u003c\/strong\u003e It is a gear used in the starter clutch assembly that helps engage and transfer rotation from the starter system to the engine during starting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e How do I verify this fits my vehicle? \u003cstrong\u003eA:\u003c\/strong\u003e Check your engine code, displacement, and existing gear part number or dimensions, and confirm they match GY6 4-stroke 49cc or 50cc 139QMB applications before purchase.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eThis is an aftermarket replacement part for the referenced application and is not represented as genuine or original equipment. Compatibility may vary by model, production date, serial number, or existing part number. Verify fitment before purchase.\u003c\/em\u003e\u003c\/p\u003e","brand":"RivetOak","offers":[{"title":"Default Title","offer_id":67592959393892,"sku":"ZZ3M01658","price":27.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0804\/6647\/7156\/files\/s-l1600_2f9d4637-4450-4b32-957b-c29be5e2dc3b.jpg?v=1790916248","url":"https:\/\/www.rivetoak.com\/products\/starter-clutch-gear-4-stroke-gy6-49cc-50cc-139qmb-scooter-moped-kart-atv","provider":"RivetOak","version":"1.0","type":"link"}