{"product_id":"cvk-main-jet-105-for-scooters-mopeds","title":"Cvk Main Jet (# 105) for Scooters \u0026 Mopeds","description":"\u003ch2\u003eCvk Main Jet (#105) for 139QMB and GY6 Scooters\u003c\/h2\u003e\u003cp\u003eThe Cvk Main Jet (#105) is built for 139QMB and GY6 engines, so it suits scooter and moped owners. It fits most CVK carburetors that have a 5mm main jet opening, which means it works with a broad range of vehicles. It is listed among our \u003ca href=\"\/collections\/scooter-carburetors\"\u003escooter carburetors \u0026amp; jets\u003c\/a\u003e. Because it controls how much fuel passes through, it helps shape how the engine runs. It is a practical option for riders who want to get more out of their scooter.\u003c\/p\u003e\u003ch3\u003eCompatibility Overview\u003c\/h3\u003e\u003cp\u003eThis main jet works with several engine codes across both 50cc and 125cc-169cc scooters. It is suited to engines based on the 139QMB and 157QMJ designs, so it can be used in more than one setup. If your engine code contains \"QM\" or \"FM\" and your carburetor is a CVK with a 5mm jet opening, this jet should be a good match for your scooter.\u003c\/p\u003e\u003ch3\u003eWhen a Main Jet Replacement Makes Sense\u003c\/h3\u003e\u003cp\u003eYou may need to replace the main jet if the engine is running poorly or if you are modifying the scooter to run more efficiently. Changes in altitude, exhaust systems, and air filters can all affect how the jetting performs. Checking and adjusting the jetting on a regular basis helps keep the fuel mixture and engine running as they should.\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\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e 139QMB-based 50cc\/80cc engines and 157QMJ-based 125cc\/150cc\/169cc engines with a 5mm main jet slot CVK\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD engines (50cc\/80cc)\u003c\/li\u003e\n\u003cli\u003eOther QMA and QMB engines (50cc\/80cc)\u003c\/li\u003e\n\u003cli\u003e157QMJ, 161QMK, 152QMI, 1P61QMK, YN1P57QMJ, 1P52FMI, 154FMI, JJ157QMJ, 1P57QMJ, BN157QMJ, BN161QMK-A engines (125cc\/150cc\/169cc)\u003c\/li\u003e\n\u003cli\u003eOther QMJ, QMK and QMI engines (125cc\/150cc\/169cc)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Find your engine code in the list above, then confirm the carburetor has a 5mm main jet slot. The jet must have an M5x0.80 thread and an overall length of 8mm.\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":"Trend Times Toy Stores","offers":[{"title":"Default Title","offer_id":51138646900793,"sku":"TT-26580","price":3.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/cvk-main-jet-105-1.jpg?v=1794376529","url":"https:\/\/www.trendtimes.com\/products\/cvk-main-jet-105-for-scooters-mopeds","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}