Motorcycles currently comply with the China IV emission standard, which was officially implemented starting from July 1, 2019. Production and registration of China III motorcycles ceased after July 1, 2019. For the next few years, the exhaust emission standard for motorcycles will remain at China IV, with no specific implementation date announced yet for China V. The China IV emission standard is the fourth phase of the national motor vehicle pollutant emission standard. It primarily regulates pollutants such as HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), and PM (particulate matter). Through catalytic converters, it controls and reduces motorcycle emissions, ensuring pollutant levels are below specified limits. After July 1, 2019, it is recommended to purchase China IV-compliant motorcycles for easier registration. The China III and China IV standards are based on the Euro 3 and Euro 4 standards, with some requirements being even stricter. The China IV standard focuses on controlling harmful gas emissions, which is why all China IV motorcycles utilize electronic fuel injection (EFI) technology to reduce pollutant emissions. Development of the China IV emission standard for motorcycles: China is a major producer and user of motorcycles, but the overall technical level of motorcycles still lags behind international advanced standards. Domestic motorcycles predominantly use carburetors, while more advanced regions in motorcycle emission control have widely adopted EFI technology. Given the significant room for improvement in motorcycle emission control, the Ministry of Environmental Protection established the China IV standard for motorcycles and mopeds to effectively control motor vehicle pollution and promote technological advancement and structural optimization in the motorcycle industry.
