Many thanks for the tip,just checked the carbs and now the bike is running great.
I was afraid of the damaging the engine, but now it oils fine. Aldo the carbs looked paired, when I opened throttle they became missaligned.
Now they move at the same time in all positions. Thanks for your support and the pics.
I'm trying to borrow a cam from a friend to upload a little video of the bike runing, but i'll better practice some more, it's a very sportive bike for me and i need to ride some more firstly.
Thanks again.