Problem solved, carburettor n° 2 air solenoid valve was not sealing and lean the mix on horizontal cylinder...Changed the o-rings and some silicon grease on the tip rubber seal of the piston inside the valves. I wasn,t able to find that little rubber seal new. Attached pics of the seals into the valves, it would be a good mainteinance thing to look for.
Oil pump delivery is the same in both outlets, about 5ml-10 min with pulley fully open and engine idling.
Probably I had some water from clean the bike into the right exhaust and that looks like excess oil in it.
Thanks