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What is the difference between China III and China IV motorcycle emission standards?

1 Answers

DelCharlotte

07/30/25 12:48am

China III and China IV have different emission standards. The following is an introduction to China III and China IV emission standards: Introduction to China III emission standard: The China III standard refers to the third stage of China's vehicle emission standards. The China III emission standard is equivalent to the Euro III emission standard, with similar levels of tailpipe pollutant emissions. The difference is that new vehicles must be equipped with an OBD (On-Board Diagnostics) system. Introduction to China IV emission standard: Motorcycles and mopeds are classified based on maximum design speed and displacement. Motorcycles refer to those powered by spark-ignition engines with a maximum design speed exceeding 50km/h or displacement exceeding 50mL, as well as three-wheeled motorcycles powered by compression-ignition (diesel) engines with a maximum design speed exceeding 50km/h or displacement exceeding 50mL.

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