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Description: G- CVK Main Jet 72-110 10-Pcs Kit for 139QMB 49/50cc+ CVK carburetors. Includes 10-pieces, size range from #72 - #110.Specifications:Includes the following 10 Piece Set (1 of each size main jets).•    Main Jet Sizes: 72, 75, 78, 80, 85, 90, 95, 100, 105 & 110 RPM •&nb..

Description: Stage6 CVK Main Jet 5mm 70-92 10-Pcs Kit for 139QMB 49/50cc, GY6 125/150cc+ carburetors, and 250cc 4-stroke water-cooled 172mm carburetors. Ideal Kit for adjusting your carburetor. 10 main jets are included in this kit, stored in a neat transparent box. These 5mm main jets will fit 19-2..