Absolutely nothing? Did you try the horn or brake light?
That is important - different problem depending on whether that circuit works .... or not.
If the horn/turns work, then problem possibly at the key-switch connector
If they do NOT work, it puts you back at the battery
So regardless, nothing to do with starter relay anyway
Do you have a meter? Can you measure the battery voltage?
You are confident there is no poor connection of the battery terminals, completely tight?
Also check Fuse 11 - make sure that fuse is whole and there is no problem with a poor fit into the fuse holder.
Can you take a look at that main key-switch connector - disconnect and inspect the terminals on both halves - we do not want to see any sign of burning or arcing, blackness of any kind!
p.s. Do you have ANY non-std electrical equipment/accessories on your bike?
Or different bulb in the OEM headlight? (e.g. high wattage)