{"product_id":"cvk-main-jet-125-for-scooters-mopeds","title":"Cvk Main Jet (# 125) for Scooters \u0026 Mopeds","description":"\u003ch2\u003e#125 Main Jet for 139QMB and GY6 Scooters\u003c\/h2\u003e\u003cp\u003eThe #125 main jet suits 139QMB and GY6 engines and works with a range of CVK carburetors that have a 5mm main jet slot. It controls how much fuel reaches the engine, so it has a real effect on how smoothly and efficiently your scooter runs. You can find more options in our \u003ca href=\"\/collections\/scooter-carburetors\"\u003erange of carburetors and jets for scooters\u003c\/a\u003e, which can help you get more from your ride.\u003c\/p\u003e\u003ch3\u003eCompatibility and Usage\u003c\/h3\u003e\u003cp\u003eThis jet works with 50cc and 80cc engines built on the 139QMB platform, along with 125cc, 150cc, and 169cc engines based on the 157QMJ series. Getting the jetting right often takes some trial and adjustment. For fine-tuning, it's worth reading a jetting guide before you make changes.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\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\u003eType:\u003c\/strong\u003e Keihin round-style main jet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e 139QMB-based 50cc\/80cc GY6 engines and 157QMJ-based 125cc\/150cc\/169cc engines with 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\u003e157QMJ, 161QMK, 152QMI, 1P61QMK, YN1P57QMJ, 1P52FMI, 154FMI, JJ157QMJ, 1P57QMJ, BN157QMJ, BN161QMK-A engines (125cc\/150cc\/169cc)\u003c\/li\u003e\n\u003cli\u003eOther QMA and QMB engines (50cc\/80cc)\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 Check that the 5mm main jet slot on your CVK carburetor matches, and confirm the engine code (QM or FM) printed on your engine. Expect some trial and error when setting the jetting.\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":51138620915769,"sku":"TT-26435","price":4.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/cvk-main-jet-125-1.jpg?v=1794376418","url":"https:\/\/www.trendtimes.com\/products\/cvk-main-jet-125-for-scooters-mopeds","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}