2015 Monster 821 Starting Problem

Hello guys. I'm new to the forum and I've got starter problems. I have a 2015 Monster 821 that will not start. Whenever I try to start it with the starter button, I get a clicking noise but the starter does not turn over at all. I've jumped the starter motor at the solenoid and the starter turns over. I have even traced the wiring from the solenoid to the starter relay that fires the solenoid. I have jumped that starter relay and it fired the solenoid and even cranked the engine. The wire that fires the starter relay comes directly from the ECU. So where do I go from here? I can't believe the ECU is bad. Anyone got any ideas about what could cause this?

Ok. First reset all the connectors. Still no go you'll have to probe the wire from the ECU to the starter to check for continuity. If all that is excluded it's something to do with the ecu. Check and reseat all associated fuses.

Thanks for your reply Baggerman. I thought it was the relay but it's not because I bench tested it and it was OK. Since all three of the relays are the same I swiched them out and still had the problem. I also went through the connector and fuse checks you suggested. I didn't find anything but just pulling the fuses and checking wires and contacts may have helped. I took the kill switch and starter button apart and checked the 12V at the button. I cleaned the contacts with contact cleaner and put it back together. When I tried it this time I noticed the starter sounded like it was trying to turn over. I charged the battery, tried it again and it cranked. I think the problem is what I call VooDoo electrics. That's when the bike sets up for a while without being used, the contacts oxidize a little, the battery voltage drops a bit and things work sometime and sometime they don't. It creates a nightmare when you're trying to track down an electrical problem. You test something and it doesn't work so you think your on the right track then 10 miniutes later you test it again and it works. I'm sure you have run into that.
Anyway, I have always noticed that the starter always seems to be weak, no matter what the battery voltage. Do you know anything about that. Thanks again.