What are the differences between China 3 and China 4 motorcycles?
1 Answers
China 3 and China 4 motorcycles mainly differ in their exhaust emission standards. Both China 3 and China 4 refer to emission standards, with China 4 imposing stricter requirements on the content of harmful gases in exhaust emissions, demanding fewer pollutants. However, the China 4 standard has not yet been officially announced. Currently, motorcycles in the market adhere to the China 3 standard, and it is expected that the China 4 standard may be implemented around 2017-2018, potentially phasing out carburetors entirely and adopting electronic fuel injection technology. More details are as follows: 1. To achieve the China 3 emission standard, the best approach is to switch the motorcycle's fuel supply system to electronic fuel injection (EFI). However, due to the relatively backward motorcycle manufacturing technology in China and the immature EFI system production technology, only joint-venture brand models have performed relatively well in this regard. Additionally, compared to carburetors, EFI motorcycles are significantly more expensive. Therefore, in the current domestic motorcycle market, China 3 models mostly still use carburetor fuel supply systems. 2. The China 4 emission standard for motorcycles is even more challenging to meet than China 3, requiring higher manufacturing technology. Once the China 4 standard is fully implemented, all newly produced motorcycles will need to comply with the latest China 4 standard to be allowed for production and sale. By then, carburetor motorcycles will essentially be phased out, and electronic fuel injection technology will be universally adopted.
