Motorcycle Questions? Ask a Mechanic.
Hi, I’m Louie. Sorry you had to wait awhile but I’ll do my best to help.
Initially, it would appear to be a battery issue. Proposed tries (if have not been done) would be to re-inspect the battery, its ground lines and/or re-check and re-clean the battery cables + terminals, connectors and wiring as a preliminary consideration.
More importantly, have the battery externally charged and also LOAD TESTed (even if new/charged and just for the purpose of eliminating it as a suspect).