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, let's re-try again the basics. Proposed tries (if have not been done); re-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).
Then re-try starting again the R1 while monitoring (measuring) the battery voltage before and when attempting to start.