There are a number of bikes you can't buy in America, or in other parts of the world. Some models are exclusive to one or more markets usually because of licensing and fees based on displacement (125's in the UK, 150's in India, or 400's in Japan). Other times a particular model might be available in one area of the globe and not the other because of the likes and dislikes of the buyers of that region. Here are the Hondas from around the world that you wont find in any US dealership

Honda CBR125R
-one of the best selling bikes in England because it's one of the few sporting bikes a beginner can buy

Honda XL125V Varadero

Honda XL1000V Varadero
-Varadero and Deauville have to be two of the stupidest names in motorcycle history

Honda XL700V Transalp
-Many US motorcyclists wish this bike was available here, but they had their chance; in the early nighties Honda tried the Transalp here and it didn't catch on
Honda NT700V Deauville (soon to be available in the US(for way too much $))

Honda CB1000R
-definitely one of the more desired bikes not on US soil

Honda CB600F/CB1300F

Honda CBF125/CB600F/CBF1000

Honda CB1300S

Honda Unicorn
-India has it's own line up of Honda motorcycles mostly under 150cc's

Honda CBR/CBF150

Honda VTR250
-Japan has some interesting models like this VTR

Honda CB223S

Honda CB400S