QR Code Link to This Post New 30mm Carburetor with Left Handed Cable Choke! These carburetors are used on the 200cc - 250cc Upright 4 stroke engines primarily used on the Chinese ATVS , , Motorcycles , Dirtbikes , Go Karts etc...Below are the specifications for these carbs: Engine Opening Diameter: 30mm Bolt Hole Spacing (engine side): 48mm Air Filter Mount Diameter: 42mm$65 Each If interested call or text show contact infoatv motorcycle dirt bike go kart dual sport enduro trail bike