[Lotus54]

I have the same engine in my 175 Enduro.
I use non-ethonal premium with 50:1 Motorex full synthetic 2-stroke oil.

That engine is pretty low compression and mild power. I doubt it needs premium at all, but that is what the easiest place for me to get non-ethonal has. I like to use it, since I don’t use it that much and it may sit around. The fuel lasts quite a bit longer. I use it in all my bikes.
I run that same mix in my 250 2C two stroke twin Benelli.

 

[Lotus54]

Hey man, do you know what oil you put in the transmission, theres an oil cap and i drained it when i was doing a general service but cant find anything on it!

I think I used Motul Trainsoil expert, but another good option is the BelRay Gearsaver. I use that in my vintage OSSAs and likley most similar to what was avaliable then, but no issue with the clutch.