This is the HP carburetor used in our BladeZ/Tanaka and G43L/GSR40 HP carb kits. Fits 49cc Pocketbikes and 47cc pocketbikes with ADA Racing billet intake manifold, all Active engines, 43-49cc Huasheng, EVO and Puzey engines also. Carb features 2 mixture adjustment screws, high and low speed.