Motorcycles with over 175CC?
According to Section 3.31, Article 3 of Standard QCVN41:2019/BGTVT, the definition is as follows:
Motorcycles (also known as motorbikes) are two- or three-wheeled motor vehicles and similar types of vehicles, driven by an engine with a cylinder capacity of 50 cm^3^ or more, and the vehicle's own weight does not exceed 400 kg.
Thus, motorcycles, also known as motorbikes, are vehicles with a cylinder capacity of 50 cm^3^ or more (50CC or more). Vehicles above 50CC can be referred to as motorcycles, and not necessarily that motorcycles are vehicles above 175CC.
Respectfully!

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