Hi, I would appreciate your help on this one.
I have inherited a 1976 Peugeot 103 with 1,100 miles on it. The last owners could not get it to run correctly. They put a new carb and lights on it. The past issues was that the bike was not going into neutral...... which turned out to be the clutch being installed semi backwards.
After that has been fixed the bike would run okay for a bit then die and not want to start again. That led me to the brake light ground wire in the handle bar being half disconnected. After bypassing and separating the engine ground from the brake and headlight....it runs perfectly....sometimes. It will sometimes backfire and run poorly.... then sometimes run great. Very confusing to me.
When the bike will not start at all, if i remove the engine ground wire the bike will start up.... but run poorly until high RPM. When I reconnect the ground wire the bike will die. Then 30min later it will run perfectly with the ground normally connected.
I took off the cover and it seems like the points are sparking a lot! I am not sure if that is normal or not. I do know the magneto and coil are known to go bad on these bikes but I hoping it is just a simple wiring problem or my gas tank.
I would really appreciate your help on solving this 5 year mystery. It has been amazing to finally hop on this bike and ride it around. I just want it to be 100% reliable.
Also could be my sketchy external gas tank lol
I attached a video of the moped running poorly, this is pretty bad and is not always this bad!
Video of the bike running (edited)