That thing looks sweeeeet. Weird headlight thing going on - very Aliens - but otherwise, that thing tingles the whatzits. Imagine how it rides in the twisties.... hmmm
I have a ...(ahem)... nevermind..... My current duke is a deathtrap, I can only dream...err, imagine this thing.
It's most likely a cooling water-oil heat exchanger that heats the oil up at start-up and keeps it cool when up to operating temperature, a la the very similar looking unit on BMW parrallel twin motor.