Thanks for the help and congratulations.

I have been using the bike quite alot when I was out practicing privetly so the fuel was fresh and during the winterstorage I used fuel stabalizer. I don't know how old the sparkplug is though but that I will change.

Yes, if I can remember correctly I was in the middle of a gearchange when it happend. The same when I was at the redlight and pulled away quickly it felt as though the engine was close to stalling again when I changed gear fast. I will check the idlesettings as you guys have recommended. Thanks alot!