{"product_id":"cvk-main-jet-108-for-scooters-mopeds","title":"Cvk Main Jet (# 108) for Scooters \u0026 Mopeds","description":"\u003ch2\u003eCvk Main Jet (#108) for 139QMB and GY6 Scooters\u003c\/h2\u003e\u003cp\u003eThe Cvk Main Jet (#108) is an important part for various scooters and mopeds equipped with 139QMB and GY6 engines. This component is compatible with nearly any CVK carburetor featuring a 5mm main jet slot. It plays an important role in optimizing engine performance and fuel delivery, making it one of the key \u003ca href=\"\/collections\/scooter-carburetors\"\u003escooter carburetors \u0026amp; jets\u003c\/a\u003e for your vehicle. Proper jetting may require some experimentation, so refer to available jetting instructions for guidance.\u003c\/p\u003e\u003ch3\u003eConstruction and Compatibility\u003c\/h3\u003e\u003cp\u003eThis main jet is designed in the Keihin round-style and features a thread size of M5x0.80, ensuring a secure fit in your carburetor. Its overall length measures 8mm. The Cvk Main Jet is compatible with a wide range of 50cc, 80cc, 125cc, 150cc, and 169cc engines identified by specific engine codes.\u003c\/p\u003e\u003ch3\u003eWhen to Replace Your Main Jet\u003c\/h3\u003e\u003cp\u003eMain jets should be replaced when experiencing performance issues or when adjusting the fuel-air mixture is necessary to improve engine output. Regular checks can help identify if a new jet is needed, particularly during modifications or upgrades to your scooter.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Keihin round-style main jet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e M5x0.80\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length:\u003c\/strong\u003e 8mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eThis main jet fits various engines based on the 139QMB and 157QMJ models.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e139QMB-based engines: 139QMA, 1P39QMB, 1P39QMA-2\u003c\/li\u003e\n\u003cli\u003eYN139QMB engines: JJ1P39QMB, 139FMA-2, BD1P39QMB\u003c\/li\u003e\n\u003cli\u003eBN139QMB engines: 147QMD, other QMA models, other QMB models\u003c\/li\u003e\n\u003cli\u003e157QMJ-based engines: 161QMK, 152QMI, 1P61QMK\u003c\/li\u003e\n\u003cli\u003eYN1P57QMJ engines: 1P52FMI, 154FMI, JJ157QMJ\u003c\/li\u003e\n\u003cli\u003e1P57QMJ engines: BN157QMJ, BN161QMK-A, other QMJ, QMK, and QMI models\u003c\/li\u003e\n\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-carburetors\"\u003eScooter Carburetors \u0026amp; Jets\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":52800353534183,"sku":"25-914508","price":3.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2245\/9711\/files\/cvk-main-jet-108-1.jpg?v=1791665695","url":"https:\/\/www.magiccars.com\/products\/cvk-main-jet-108-for-scooters-mopeds","provider":"MagicCars","version":"1.0","type":"link"}