Differences Between China 3 and China 4 Motorcycle Standards

[StXavier]

The main differences lie in sulfur content and pollutant emission reductions. Below is an introduction to the distinctions between China 3 and China 4 standards: 1. The most significant difference between China 4 and China 3 motorcycles is the substantial improvement in emission standards, which leads to changes in motorcycle pricing and performance. To meet the emission requirements, China 4 motorcycles have replaced traditional carburetors with electronic fuel injection systems and upgraded their exhaust systems. 2. The China 4 motorcycle emission standard was implemented on July 1, 2019. This standard represents the fourth phase of national motor vehicle pollutant emission regulations, targeting pollutants such as HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), and PM (particulate matter). Through catalytic converters, emissions are controlled and reduced to levels below specified limits. 3. The China 4 standard primarily focuses on controlling harmful gas content in exhaust emissions. Therefore, all China 4 motorcycles utilize electronic fuel injection technology to reduce pollutant emissions.