You need to check your own manual.
Is it NEW, NEW, or run in and new to you?
Most start with a 25:1 mix - with options on oil and petrol choice .... with a NEW, NEW engine, and then lean out, both with the engine tuning, and the mixture.
All agree, there is NOT MUCH change in running a mixture with a little too much oil, BUT if you consistently run too LEAN, you stuff your engine - for nothing really.
I'm on 32:1, and mine's a rocket!! That's for a standard engined FG MT with a 'modified pipe' on, a DDM high-end Dominator.
TAKE CARE - it's worth it.
Al.