I have been a serviceman in Germany (USAF 1991-1994) and owned motorcycles (1986 GSX-R 1100). When I returned to the states, it wasn’t the headlight that had to be replaced at all since most are centered on the road anyway. Something you want while going 150 MPH on the Autobahn. It was the license plate holder that holds a much different shaped plate in Europe and also the tires. The tires that came with the motorcycle were not DOT approved being from a European manufacturer. (Metzler)
To top it off. The English do not consider themselves European. They consider themselves from England. An Island off the coast of Europe. This throws off the puzzler off even more.
I say tires are the thing that has to be changed to legally drive the motorcycle in the States.
Click and Clack, correct this continental conundrum of continuity in continuing to confuse the consensus!