What is the difference between China III and China IV motorcycles?

[Abigail]

The main difference between China III and China IV motorcycles is the reduction in sulfur content, and more importantly, the decrease in pollutant emissions. The most significant distinction between China IV and China III motorcycles is the improved emission standards. Whenever emission standards are raised, both the price and performance of motorcycles will change. To meet the emission standards, China IV motorcycles have replaced the traditional carburetor with an electronic fuel injection system and upgraded the motorcycle's exhaust system. Electronic fuel injection is the core difference between China III and China IV motorcycles. However, many riders are aware that numerous China III motorcycles are already equipped with electronic fuel injection, so why don't they meet China IV standards? Therefore, while electronic fuel injection is the fundamental difference between China III and China IV motorcycles, there are other factors as well. The electronic fuel injection system in China IV models is superior to that in China III models. After a period of research and development, the performance of electronic fuel injection has improved significantly compared to when it was first introduced. After adjustments, it now meets the current China IV standards, whereas the original China III electronic fuel injection performance was slightly inferior. China III and China IV are both motor vehicle emission standards, also known as the third and fourth-stage emission standards. They are formulated with reference to Euro III and Euro IV standards, but some criteria are even stricter than Euro III and Euro IV, primarily aimed at limiting the content of harmful gases in exhaust emissions, reducing air pollution, and protecting the environment. Motorcycles that comply with Euro III and Euro IV standards require certain technical upgrades.