{"product_id":"gy6-50cc-139qmb-intake-valve-69mm-for-50cc-4-stroke","title":"GY6 50cc (139QMB) Intake Valve 69mm for 50cc 4-Stroke","description":"\u003ch2\u003eReplacement Intake Valve for QMB139 50cc Scooters\u003c\/h2\u003e\u003cp\u003eThis intake valve is made to swap in for a worn or damaged part in a QMB139-powered 50cc scooter. It measures 69mm overall, with an 18.5mm head diameter and a 5mm shaft diameter, matching the factory dimensions used on standard 49cc\/50cc 4-stroke horizontal engines. It belongs to the group of \u003ca href=\"\/collections\/gy6-50cc-parts\"\u003eGY6 50cc scooter parts\u003c\/a\u003e that help keep the engine running as it should.\u003c\/p\u003e\u003ch3\u003eHow It Works and Fitting\u003c\/h3\u003e\u003cp\u003eThe intake valve controls when the air and fuel mixture flows into the combustion chamber. With age, this component can wear out, which may show up as lower power or misfiring. Swapping it out is a straightforward job for anyone comfortable with basic scooter upkeep, and it lets the engine return to smooth, efficient running.\u003c\/p\u003e\u003ch3\u003eSigns It May Need Replacing\u003c\/h3\u003e\u003cp\u003eA failing intake valve can cause weak acceleration, odd engine sounds, or trouble starting the scooter. If any of these appear, check the valve and replace it if needed to bring the engine back to good performance. Routine inspections can catch problems early and help the scooter stay dependable.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Intake Valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Diameter:\u003c\/strong\u003e 18.5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Diameter:\u003c\/strong\u003e 5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length:\u003c\/strong\u003e 69mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Compatibility:\u003c\/strong\u003e QMB139 49cc\/50cc 4-stroke horizontal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e QMB139 49cc\/50cc 4-stroke horizontal engines (GY6-style) on Chinese-made scooters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eQMB139 49cc\/50cc 4-stroke horizontal engine (69mm overall length, 18.5mm head)\u003c\/li\u003e\n\u003cli\u003eVarious unlisted makes and models using the QMB139 engine platform\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Confirm the engine is a QMB139 49cc\/50cc 4-stroke horizontal, and make sure the valve is 69mm overall with an 18.5mm head and 5mm shaft.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShop more:\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-fuel-system\"\u003eScooter Fuel System Parts\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":51134468751417,"sku":"TT-15945","price":6.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/gy6-50cc-139qmb-intake-valve-69mm-for-50cc-4-stroke-1.jpg?v=1794344319","url":"https:\/\/www.trendtimes.com\/products\/gy6-50cc-139qmb-intake-valve-69mm-for-50cc-4-stroke","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}