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

Description: G- Carburetor CVK Main Jet Kit for 139QMB 49/50cc+ and GY6 125/150cc+ carburetors and 250cc 4-stroke water-cooled 172mm carburetors, includes a size range from #100 - #140.NOTE: Will work on 139QMB CVK carburetor (Part# NK200.06) that accept 5mm main jet ONLY. Most commonly found on GY6..