{"product_id":"cvk-main-jet-142-for-scooters-mopeds","title":"Cvk Main Jet (# 142) for Scooters \u0026 Mopeds","description":"\u003ch2\u003eCvk Main Jet (#142) for 139QMB and GY6 Scooters\u003c\/h2\u003e\u003cp\u003eThis Cvk Main Jet (#142) suits 139QMB and GY6 engine scooters and mopeds. It works with most CVK carburetors that take a 5mm main jet, so it is a flexible option for many setups. If you are browsing \u003ca href=\"\/collections\/scooter-carburetors\"\u003ecarburetors and jets for scooters\u003c\/a\u003e, this part helps with engine tuning. Getting the jetting dialed in may take a few tweaks, and more guidance is available if you need it.\u003c\/p\u003e\u003ch3\u003eCompatibility and Performance\u003c\/h3\u003e\u003cp\u003eThis main jet works with engines in the 50cc, 125cc, 150cc, and 169cc range. It covers several engine codes, so it fits a broad selection of models. Finding the right jetting usually takes some trial and error, so plan to test a few adjustments to get the best result.\u003c\/p\u003e\u003ch3\u003eConstruction Details\u003c\/h3\u003e\u003cp\u003eThis jet follows a Keihin round-style design and is built to firm quality standards. It measures M5x0.80 for the thread and 8mm overall in length. These dimensions allow it to seat securely in its carburetor slot, which supports steady fuel flow and efficient combustion.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e 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 GY6 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 (5mm main jet slot CVK carburetor)\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 (5mm main jet slot CVK carburetor)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Compare the engine code on your motor with the list above, or confirm that your carburetor has a 5mm main jet slot. This jet has M5x0.80 threads and measures 8mm in length.\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":51138611740729,"sku":"TT-26417","price":3.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/cvk-main-jet-142-1.jpg?v=1794376388","url":"https:\/\/www.trendtimes.com\/products\/cvk-main-jet-142-for-scooters-mopeds","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}