Motorcycle Repair: 1980 CB 125 electrical, reversed polarity, trickle charger

Question
Starts and runs great.  Last time out the lights flickered and then went out.  Now no head, tail, brake, or neutral lights. Right turn signals work and left turn don't. Just replaced battery.  Possible reversed polarity on trickle charger on old battery.  Usual suspects can't remember or won't confess.

Answer
I don't think it's related to reversing the polarity.  It sounds like a loose or corroded connection.  There are a number of places it could be.  I'd start in the headlight and work my way back to fuses.  There's a head light connection that goes to the headlight switch that get's it's power from the fuse through the key switch.  Think of it as a murder mystery and you're trying to follow the clues to who done it.

Regards
Rich