Yes Sir take your time
That is fully possible
My guts still says it's the ignition switch (where the key goes).
Food for thoughts
http://www.xs650.com/threads/72xs2-73tx-wiring-diagram.53244/
Into the Main Switch goes a red wire that comes from battery and fuse
When the key is turned the red is connected to the brown that is connected
to the upside of the kill switch ...
So if there is 12 V at the downside R as in Red ( Electrical downside it is up in the picture ) after the fuse 12 o clock above text fuse
If you draw a wire from 12 o clock on the picture it is after the fuse the fuse is still operating
if a short it (fuse ) breaks
If you pull that extra wire to the upside of the kill switch 12 o clock on the picture the kill switch has 12 V
And the kill switch is operating as well as the fuse.
Then the ignition key is bypassed and if the kill switch is working
You then know if the key switch was the problem .
Others can come in I am thinking ignition switch on
And not leaving the extra wire there after testing .Because in some cases ignition parts don't stand having power on
Which it will be when bypassing the Key switch according to this.
Putting in a smaller fuse in the first test