【Compatibility】 This carburetor is suitable for universal engines over 150cc, motocross, enduro, On/Off Road scooter, ATV Quad. Intake manifold internal diameter: 38mm. 【INSTANT RESPONSE】 Let you say goodbye to weak starting, you can conquer all kinds of terrain. It can better maintain engine performance and provide continuous power, even in cold winters, it can start faster. It is highly recommended to install. 【BELL MOUTH DESIGN】 Enlarges the intake contact surface and the atomization effect is more stable. This PWK carburetor can automatically adjust the oil and gas concentration according to the engine operating conditions to provide an appropriate amount of gas mixture. 【ALUMINUM ALLOY MATERIAL】Made of aluminum alloy, the surface of the carburetor is anodized for better wear resistance, heat resistance, corrosion resistance and insulation. Good material ensures the reliability of the PWK carburetor.