So you hear your starter solenoid clicking?
If you're sure it's the starter solenoid clicking, then some power is getting to it, but not enough to get the starter to spin. Bad ground/faulty wiring?
There's a starter relay on the left side of your subframe. You have to remove the tail section to access it - I'd inspect that relay and fuse and see what noises it makes _ if any _ when you try to start the bike.
This sounds dumb, but you're sure the kill switch is in proper position?