Speeding in France - Dont... can be an instant ban....
Just back myself from Spain, met 3 bikers on the Bilbao ferry, 2 on Honda Fireballs and one on a Duc 1098. One of them was clocked at over 180 kph result was big 750 euro fine and an instant ban in France, licence taken away. As a result their planned trip to Mugello turned into getting a mate living in France to rent a van, drive to them to pick up the banned rider and his bike, drive to the Spanish border where matey could unload his bike and their Moto GP trip turned into a tour of N Spain.
So be warned. A bit of googling shows that 180 kph seems to be the magic figure. Below that its "just" a fine. If you have no mates to help you out then tough "ziz is your probleme monsieur" and you have to arrange getting your bike home or at least out of France. If you decide to risk it and ride in France while banned and get caught then its prison time pour vous mon ami. Although taking away your vehicle is also an option. That has to go to court in France though.
To be realistic though you need to be going pretty fast to get into this much grief. 180kph is 111mph which would get you a ban in the UK too and a lot of trouble in other EU countries I guess. I thought it worth warning about the ability of the French police to ban you instantly at the side of the road.
Further research shows that 50kph over the limit is the instant ban trigger.