Is it illegal to modify a motorcycle with a short tail?

[Angela]

Modifying a motorcycle with a short tail is not illegal. Here is a relevant introduction about vehicle modifications: Concept: Modification refers to altering the external appearance, internal design, and mechanical performance of a vehicle originally produced by the manufacturer, based on the owner's needs. It mainly includes two types: body modifications and power modifications. Regulations: Vehicle decoration relates to the safety performance of the vehicle, and modifications can have a greater impact on safety. Before modifying a licensed vehicle, the owner must register and declare the modifications to the vehicle management office. The modification technical report must be reviewed and approved by the vehicle management office before the modifications can proceed. After the modifications are completed, the owner must also complete the modification change procedures at the vehicle management office.