Now I checked the valve clearence my bike feels beter! (for the record: I did it in 3 hours :P )
One exhaust valve clearence was to small so I repaired that one. Also I noticed that the ignition candle of my back cylinder was not tihgtened!
So that's maybee the reson I had a lack of power...
Now I have done a testride and it feels a lot better, but to be sure I will do a dyno-run next week. Let's hope it's better than befor.
