{"product_id":"valve-guide-for-scooters-mopeds","title":"Valve Guide for Scooters \u0026 Mopeds","description":"\u003ch2\u003eValve Guide for 50cc 4-Stroke Engines\u003c\/h2\u003e\u003cp\u003eThis valve guide is designed specifically for 50cc 4-stroke engines, particularly the QMB139 models. It's a key component in the cylinder head assembly, helping to ensure proper valve operation and engine performance. Like most \u003ca href=\"\/collections\/scooter-cylinder-heads\"\u003escooter cylinder heads \u0026amp; valves\u003c\/a\u003e, it is important for maintaining effective engine function. If you're experiencing low compression or issues like ticking or burnt valves, this part may be necessary for your repairs.\u003c\/p\u003e\u003ch3\u003eWhen to Replace It\u003c\/h3\u003e\u003cp\u003eReplacement of the valve guide may be needed when your engine shows signs of poor performance, such as low compression or irregular noises. Ensuring the guide matches your engine's bore size and code is important for effective operation and engine longevity.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length:\u003c\/strong\u003e 31 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e QMB139 50cc\/49cc engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eThis valve guide fits the following engines:\u003c\/p\u003e\u003cul\u003e\u003cli\u003eQMB139 50cc\/49cc\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eNot sure it fits? Contact us with your scooter's make, model and year and we'll confirm the fit before you order.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShop more:\u003c\/strong\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":"Magic Cars","offers":[{"title":"Default Title","offer_id":52795139850471,"sku":"25-901655","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2245\/9711\/files\/valve-guide-1.jpg?v=1791583922","url":"https:\/\/www.magiccars.com\/products\/valve-guide-for-scooters-mopeds","provider":"MagicCars","version":"1.0","type":"link"}