Hello, thank you.
As i also discovered on the Honda site some month ago, the engine, by itself, is fully Euro 4 compliant:
Sekiya:
I'd imagine that with a lower output, various aspects of developing an engine would be easier, but was this the case?
Fukunaga:
No, not at all. Since the engine is air-cooled, we had difficulties with engine temperature and environmental aspects such as exhaust regulations. The oil-cooling structure around the spark plug seating was a headache, and since we didn't want the CB1100 to be one-off model, we considered not only Japan-domestic emission regulations, but Euro4 regulations for 2016. [2017]
http://world.honda.com/CB1100/engineer-talk/episode5/
But for the german/european Euro4 regulation, there are more demands than just the engine, there have to be an bus system for electronics, something like CAN and there has to be an interface, an "On Board Diagnostic" system, (of curse ABS which the cb has), and the OBD has to deliver substantial information about the bike.
Therefore, the CB1100EX 2016 is not Euro4 compliant and it is forbidden, to sell a new one in europe from th 1.1.2017. If Honda wants to follow their model line, they have to make some adjustments to the CB1100Ex and then they would roll out an new version of the cb1100ex. I believe, that they do exactly this, launch a new version of the CB1100EX (otherwise, the cb1100ex engine with euro4 norm would had made no sense).
regards