Quote Originally Posted by Zhu962
what's the carbon fiber tube that sits under the tail for? sorry I'm asking.
The PB pic is from early 2008 when the bike was first shown. A lot of development has come since then in trying to cool the exhaust.

The bike in the vid is a different machine vs the Nortion liveried machine. I don't know if it is a development bike or other use. Check the vid between 0:29 - 0:43 to see why they need the cooling.

http://www.youtube.com/watch?v=ph-n7-naQxo



Sportrider.com...

A small electric extractor fan pirated from an R/C model aircraft sits in an underseat duct in the tailsection, helping pull cooling air from between the rotary engine's housings. The fan's variable speed is controlled by the ECU according to engine temperature

Here is where the piping is rooted to.