I guess my most unreliable would have been my 1980 Honda CB650. Had charging issues that led to many dead batteries. Finally got all that sorted and for no reason I could find, the motor locked up. Tore it down, put it back together and it ran awesome! For like 5 minutes and then locked up again... parted it out after that

Always remember to be yourself. Unless you suck. Then pretend to be someone else.