Advantages of KSR EVO Carburetor: - This is a high performance carburetor with flat throttle valve and funnel as standard equipment. - Reinforced return springs come as standard equipment and can be used for both 2-stroke and 4-stroke engines. - The top cap is screw type, so it is easy to put on and off for setting. - The outer dimensions are almost the same as PWK type carburetor, so there are many accessories for installation and insulator. - Koso KSR Carburetor is specifically developed to enhance the fuel and air supply. - Maximize the upper rotation performance with additional power jet can help to increase the fuel supply. - Various sizes are available to accurately enable the choice of the carburetor as needed for the engine.