My bike was in the garage all winter and the battery tender I had it on got unplugged at some point, so the battery died. I charged it, my charger states it is fully charged. But when I turn the key the Neutral light, odometer, and engine light flash. Putting it on RUN I don't hear the fuel pump either. I've had the battery die before and charged it with no issues. Any ideas what this could be? I researched the forums and haven't seen this error combination of lights flashing.
Automotive type batteries and not like RV deep cycle batteries. You can't let them take a total dump like that and expect them to continue to come back to life. Time to buy a new one and take better care of it.