I spoke to the factory and they confirmed change, apparently they did want Harley engine as it would make servicing straightforward via Harley agents in the US. Looks like Harley offered the engine in emea but guess some kind of branding issue kicked off, guess HD suspect they might lose top end sales? who knows. Factory said S&S make the engines for Harley.

The engine in question seems to be an S&S X-wedge which is well reviewed and seems to be a custom engine for one off bikes with good hp and reputation. It appears to have a 56' angle as Harley have a copyright on the 45' configuration. Which it seems makes it a bit smoother. Jay Leno has had one built in to a one off bike plus found a sound clip on youtube..

http://www.youtube.com/watch?v=c-47Yo-NbZo&feature=related

bh