sounds to me like your oil pump chain either fell off or broke or your oil pump died. I would no run the bike until u inspect that.
it only moves in fifth gear, if i shift down to 3rd it stop spinning. the motor sounds and feels like it's struggling and it's not run smoothly. also after runnig the motor for a minute is is very hot.It's probably not the chain if it moves in ESP ... Sounds like the swash plates aren't returning , I'd first do an oil pressure test and then check the shift control motor ..