Includes Electric Choke;Open & Adjustable Enrichment ScrewInner Diameter (intake side): 24mm / Outer Diameter (intake side): 32mmInner Diameter (air filter side): 38mm / Outer Diameter(air filter side): 43mmPartner with Manufacture who is dedicated in Carburetor industrial for more than 15+ Years. One of the TOP5 suppliers at the carburetor suppliers base; Each carburetor has been tested the appropriate ratio of air and fuel mixture,provides great power and torque.For the 4- stroke GY6 125cc 150cc engine.BMS 150,Znen 150 ,Tank 150,150,Vento 150,Kandi 150,Retro 150,150,Helix 150,Jonway 150,Shenke 150, Zircon 150,150,Hensim 150,Qingqi 150,Kinroad 150,Kinroad 150,Carbide 150,Quantum 150,Baja 125 150,Eaglecraft 150, Eton Yukon 150,Coolster 3150DX2,Dazon Raider 150,Carter Talon 150,Lance Vintage 150,125 150 4 stroke,American Sportworks 150, Tomerlin Crossfire 150 150R,Kymco Agility125 150 4 stroke,Hammerhead GTS 150 ,etc.Includes Electric Choke Inner Diameter (intake side): 24mm / Outer Di