AFTER THE BATTERY, CHECK THE 10 AMP FUSE FOR THE IGNITION. If someone had tried to jump start the bike, this can cause the fuse to do its job. (Yep I found out the hard way when I jumped a buddies bike, it took till the next day but I had no joy.) Keep a few spare fuses with you too.

Mal: "Y'all see the man hanging out of the spaceship with the really big gun?{ref, Jayne} Man's lookin' to kill some folk. So really, it's his will y'all should worry about thwarting."