Do China IV motorcycles have three-way catalytic converters?
1 Answers
China IV motorcycles are equipped with three-way catalytic converters, as national regulations require China IV models to have them; otherwise, their emission standards would fail to meet environmental requirements. How to determine the condition of a three-way catalytic converter: Visual inspection. Check the exterior of the three-way catalytic converter for any damage or discoloration. If there are scratches, cracks, etc., it is likely that the converter has been damaged. If there are noticeable gray spots in the center of the converter's protective cover, severe fading spots, or purple discoloration on the shell, the converter may have experienced overheating issues. Observe the engine's exhaust. Place your hand near the exhaust pipe outlet to feel the exhaust flow and check if the three-way catalytic converter is clogged or if there is poor exhaust flow. Another method is to open the air filter, remove the filter element, and observe if there is exhaust backflow during rapid acceleration, which would indicate poor exhaust flow. To assess the condition of the TWC (three-way catalytic converter), check if the secondary air injection pump is functioning properly. Use an infrared thermometer. Compare the temperature difference between the front and back of the TWC using an infrared thermometer. If the temperature difference between the inlet and outlet of the three-way catalytic converter is less than 10°C, the TWC is likely damaged.