It's a lot more complicated than that.
It is that.
Laws in France have been made and abolished on a number of items concerning motorcyclists which leads to a lot of confusion.
As some have mentioned already..
Breathalyzers - It was a legal requirement and you faced a fine of around 12 Euros if you didn't possess one, that has now been indefinitely postponed. But the alcohol limit in France is a lot lower than ours. Worth noting if you are prone to a lunchtime stop and sampling the local vino. They're not expensive and are small, so not worth not carrying one (or two).
Sat Navs with speed camera positions and/or speed detecting blocking equipment - Worth noting if you use your phone with a sat nav program or a dedicated sat nav with speed camera info, a big no no in France. They are hot on speeders and people have had their vehicles confiscated along with heavy fines.
Reflective gear - The law of wearing a jacket with a reflective square of around 150cm2 was brought in on January 2012 and abolished a year later. BUT.. An old law exists with regard to helmets having reflective marks on them you’ll need water-resistant stickers, each with a surface area of 18cm2. The French Police had been very relaxed about it, but have been pushing it of late and it carries a 135 Euro fine if you are pulled. Hi Viz jackets are to be worn in event of a breakdown, so you need to carry a Hi Viz under the seat etc.
Bulbs and light kits - Goes without saying. Don't forget to put deflectors on those lamps.. (You'll blind the little old French lady in her 2CV otherwise)
Paperwork - Goes without saying, all paperwork. (Registration document, driving license, Insurance paperwork, Breakdown/recovery forms, E111 Euro Health card.)
GB Sticker - Don't forget to tell everyone where you come from!
I love riding in France, they are so much more bike aware there. If I could give only one piece of advice, don't take the pee out of the speed limits (especially during Le Mans weekends and French MotoGP rounds), most peage toll routes are covered by radar traps as are a lot of small villages and towns. Avoid them and stick to the D and N routes
