What is the national emission standard for Motorcycle IV?

[EzraDella]

Motorcycle IV refers to China 4 emission standard. China 4 emission standard for motorcycles means: China 4 emission standard for motorcycles refers to the fourth phase of national motor vehicle pollutant emission standards, which mainly limits the content of harmful gases in exhaust emissions to reduce air pollution and protect the environment. The main pollutants emitted by motor vehicles include HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), and PM (particulate matter). Scope of application: GB14622-2016 and GB18176-2016 apply to motorcycles and mopeds using various fuels, respectively. Among them, motorcycles refer to those powered by spark-ignition engines, while mopeds refer to two-wheeled or three-wheeled light motorcycles powered by spark-ignition engines, with a curb weight not exceeding 400kg, an engine displacement not exceeding 50mL, and a maximum design speed not exceeding 50km/h.

[Gonzalez]

I recently helped my cousin look into motorcycles and checked this out! The 'IV' on motorcycles stands for the China IV emission standard. This standard became mandatory nationwide starting July 2019, requiring all newly produced motorcycles to comply. Nowadays, almost every new motorcycle you buy comes with this label. The most notable feature of China IV-compliant bikes is the complete transition to electronic fuel injection, phasing out carburetors. Older carburetor models simply can't pass annual inspections anymore. When buying a used motorcycle, you need to pay special attention—if there's no China IV label on the nameplate, chances are it can't be registered. I once saw someone buy a cheap China III bike to modify, only to get stuck at the DMV during the transfer process—it was a huge hassle.

[LaSpencer]

My friend in auto repair told me that IV stands for China 4 emission standard. China 4 is much stricter than China 3, requiring mandatory installation of OBD systems for real-time exhaust monitoring. Many classic older models were directly discontinued due to the high cost of upgrading to electronic fuel injection. I remember back in 2018, dealers were desperately clearing China 3 inventory cars. You can still find bargains in the used car market now, but the transfer process is particularly troublesome. Here's a lesser-known fact: The catalytic converters in China 4 vehicles are extremely delicate - using low-quality gasoline can easily clog them. The repair costs can amount to half a month's fuel expenses, a pitfall I've personally experienced! Nowadays, even when refueling motorcycles, I carefully check the octane rating.

[VonBrantley]

Simply put: The motorcycle standard IV refers to the China IV emission standard. Now that the vehicle management system is nationwide networked, last year I helped a friend transfer ownership of a second-hand motorcycle bought from another province, and the emission standard was displayed immediately upon scanning the frame number. China IV motorcycles have a palm-sized catalytic converter in the exhaust pipe, and even a minor scrape that requires replacing this part can cost several hundred yuan. The owner of the repair shop I frequent complains that fixing China IV motorcycles now requires a dedicated diagnostic tool, unlike before when a wrench and screwdriver could do the job. Some old-school enthusiasts dislike fuel injection systems, claiming they lack soul, and secretly modify them to carburetors. If caught, the vehicle is directly impounded—it’s really not worth it.