Are motorcycles that can be ridden with a class A1 licence required to display a number plate?

A)No.
B)Only if they have a sidecar.
C)Yes.Correct
The following must be registered:

- Motor vehicles: automobiles (motorcycles (all), passenger cars, mixed-use vehicles, motorhomes, buses, lorries, etc.) and special vehicles (agricultural and construction and services vehicles).
- Mopeds.
- Vehicles for persons with reduced mobility.
- Trailers, semi-trailers and towed special machinery whose maximum authorised mass exceeds 750 kilograms.