Having the relays fitted was a good move and that has made the start button less likely but it may not rule it out.
The clutch switch is another weak point, you can join the 2 wires at the clutch switch to bypass it, if your bike starts every time with the bypass in place then the clutch switch is the problem.
You can't leave the bypass in place as you bike may stall when you stop, so bypass it for a few days only.
Aftermarket clutch leavers can cause problems not meeting the switch every time.
If it's not the clutch switch then we are back to the headlight switch or the big plug above the radiator on the left side of bike.
Some of the 19 rides in my shed
2014 V2, Snoopy
2009 Wee, Pumbaa the pig
WR450F, The Blue Postie Bike
YZ250N smoker with rego, Stinky.
Yamaha MT09 (FZ09), The Scud missile.
Club Lead not Club Med.
He with the most toys wins.
Out of my depth in a puddle.
Live life on the edge you will see more that way.
Ridding a motorcycle keeps things in balance.
At the end of each trail and at the end of each day history is made.