25 Valve Engine

[deemde]

Does anyone have information, or know where I can find information, on the 25 valve engines?
I did find a couple of photographs in the past.

 

[scotty33]

http://forums.vwvortex.com/zerothread?id=1148072
I think I saw one of these at the time at the motor show NEC. I think the bumph said Audi worked on the design with Yamaha, having already developed 5v bike engines.