Is Adding Side Cases to a Motorcycle Considered Illegal Modification?

[Miles]

Adding side cases to a motorcycle is considered an illegal modification. Below is a detailed introduction to the scope of illegal modifications for motorcycles: Exterior modifications: Changing the vehicle's exterior logos, colors, decals, adding a sunroof, front and rear bumpers, luggage racks, rear spoilers, upgrading tires and rims, chassis, etc. Interior modifications: Modifying interior facilities, including replacing the steering wheel, installing sport seats, adding instrument devices, and sound-deadening materials, etc. Power system upgrades: Modifying components such as the exhaust pipe and turbocharger, exploiting the gap between the engine's designed power and actual power to temporarily increase displacement.