Royal Enfield has produced several 125cc motorcycles over the years, so without more specific information, it is challenging to determine the exact model name of your Royal Enfield 125cc motorcycle.
These are just a few examples, and there may be other models depending on the year and region.
If you can provide more details about the specific year or any unique features of your Royal Enfield 125cc motorcycle, it might be possible to identify the exact model name.