hallo, I was looking to day on a German forum and up north is a firm called Edelwiesse thier a bit licke Sebenrock and they reckon with just changing the cam and pistonrods a k&N filter and the manifold what they have wich I wouldent rate any way will produce 85 bhp if thats true its a big upgrade I will be macking for littel money 
http://edelweiss-motorsport.de/class-motorrad/

http://edelweiss-motorsport.de/class-motorrad/