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CB650F How does gas octane correlate with running lean or rich

FogDucker

2018
CB650F ABS
Apr 3, 2019
Canada
Hey folk (specially veterans), I am not even sure if I have chosen a right title but so many questions are running around in my mind which I have not found any clear answer for.
All of my questions are basically the same (at least to me!) but wanted to know if they make sense at all.

1. lets say you are running fairly lean (after Market Exhaust + Stock filter change + closed loop) > Fairly slower combustion > Does it mean you can compensate with fueling with premium grade Gasoline to have a spot on combustion timing?
2. can you put minimum required grade and compensate for a rich running engine?
3. if Honda is running lean by default (mith no mods), does it help to go way over the recommended octane to have a close to optimum performance? or its just waste of money
4. it was all B.S since its all about sparks and valves timing, AFM and so many other factors and I am as dumb as a peanut?!

Thanks in advance for not choosing number 4! :)
 
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