The European Traffic Police organization, TISPOL, have an on-line database that can be consulted to find out what the exact Rules of the Road of a specific country in Europe are.
Remember that Europe consists of different countries with their own laws. Ignorance of the laws are not accepted. This database can help you.
Though France is a motorcycle friendly country with millions of motorcycle and scooters on the street everyday, it is not known in terms of motorcycle manufacturers and related gear.
But it's not true. There are quite a lot of leading companies working in the field of motorcycles, some world class. Here's a list:
For foreigners who want to race in this famous and crazy beach motorcycle enduro race, the Le Touquet Enduropale, you can now rent BMW G450X Enduro or Honda motorcycles.
The Honda bikes even come with mechanical assistance during this mythical 3 hour race.