The French being French will just ignore any law they don't like and if the authorities start clamping down , they'll take to the streets and bring the country to a standstill as they've done before.
Unlike most countries , when French bikers protest , they do it properly .............
The FFMC (our equivalent to MAG) are are quite a powerful group who have been known to bring every major city in France to a standstill at the same time. Got caught up in one in Marseille once - very impressive.
The chances of being pulled in France by the police are slim if you're on British plates unless you're doing something really stupid. They can't be arsed with the paperwork.
Buying and selling
If you have ridden motocross, the bike should be OK for you, since you will not be cack-handed with the throttle or brakes a way a newbie would. But cornering on pavement is quite different from the dirt technique.
Everything could be above board here, or it could be a $2,500 education on what can go wrong buying a motorcycle in a private transaction.
Is the seller getting out of motorcycle because he crashed the bike? If not, why not trade it in at a dealer? Because he thinks he can get more money in a private sale, or because there is something wrong with the paperwork/title?
There are title search companies that can run the history - a legitimate seller will not object to you doing this.
MCN site & MCN forum feedback
The link to terms and conditions for your ride-away insurance on every bike sale page goes to an old, broken page:
MCN Fantasy Road Race 2015 - in association with Bennetts.co.uk
Come on then, don't be shy.....