Motorcycle Questions? Ask a Mechanic.
Hi and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, proposed preliminary checks (if have not been tried); inspect the battery & ground lines and/or check/clean the battery cables + terminals as a preliminary consideration. Better yet, have the battery externally charged and then LOAD TESTed (even if new and just for the purpose of eliminating it as a suspect).
Further checks on the possibility of a charging issue; under-voltage, regulator/rectifier and/or stator concern(s). With a volt/multi-meter, determine the battery voltage with/when:
Please post back results / observations of the above once done.
Consider re-checking the fusible link(s) from one the terminal of the starter solenoid. All other checks would be with the SSCB (solid state circuit breaker).
Please post back how things turned up and/or should additional information be needed.