Actually, outside of UK, it's already the case pretty much. In Ireland there's nothing in law to stop you modifying, other than usual safety & noise level laws, but it's almost impossible these days to get insurance quotes once the word modified is mentioned. I had a lot of trouble getting a policy on my own zed, and by your standards, it's a stock car (dual exhaust, decay, air filter). In France, any modification that changes the specification on the registration doc (e.g. Power output) means the vehicle must be inspected and documents updated. Even custom exhausts are illegal unless specifically approved by the manufacturer. It effectively means that the market for mods over there is limited to wheels and audio. Just saying that UK seems to be very much an exception to the rest of Europe in terms of modified cars
Sent from my GT-I9195 using Tapatalk