So just for curiosity purposes, I went and plopped down $135 for a new top of the line AGM sealed battery for the bike. My old one started the bike just fine, but was a little under the proper voltage when sitting for 24 hours. Unfortunately this didn’t solve the issue either. I believe I’ve pretty much ruled out everything at this point, wiring, battery, stator, etc. All except the amp, but without headsets I don’t know how to test it aside from buying another one.