Motorcycle Questions? Ask a Mechanic.
Hi Steven and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially and if have not been tried; inspect the battery & ground lines and/or check/clean the battery cables + terminals, connectors and wiring as a preliminary consideration. Have the battery externally charged and then LOAD TESTed (even if new and just for the purpose of eliminating it as a suspect).
To confirm a charging issue, determine the battery voltage when:
Carefully test the output AC Voltage of the stator.
Good luck and thank you too for the opportunity to be able to share the above information.