Cateye Turn Signals: Cateye turn signal kits, made in Japan, were an add-on accessory. They had a rechargeable 5.5 volt Ni-Cad battery pack, mounted with the front two lights on a chrome bar that clamped onto a moped handlebar. All of those original batteries died in the early 1990’s.
Cimatti Wiring: Cimatti, with the Minarelli V1 engine, has functionally the same as the “Minarelli Wiring”, except for the high-low beam headlight, the console light/horn switch, and the secret toggle switch under the headlight that grounds the blue wire when in the forward position.
Concord (Fantic) Wiring: Concord mopeds with Minarelli V1 engines have “Minarelli Wiring”. The ignition source ground powers the brake light and must be grounded to run. There is a secret resistor inside the tail light. When that burns out the engine dies when the brakes are applied.
Colombia Wiring: American-made Colombia mopeds can have two different frames, mono-tube and stamped sheet, and two different engines, Sachs 505 or Solo belt drive. But they all have the same Bosch 5-wire 90mm magneto, same wiring and electrical equipment, except for the headlight. Blue is ignition, green and green/black are brake light, yellow is head light, and grey is tail light.
Invisible Forces: Notice that on the Colombia (and others) the tail light gray wire goes straight from the generator/magneto to the light, and not through the light switch. You would think the tail light would then stay on all the time. The small tail light generating coil is close to the larger head light generating coil. Somehow the magnetic field changes around the head light coil when the light is switched on, and that energizes the nearby tail light coil. So the tail light only works when the head light is working. This prevents tail light burn out caused by overload from a burned out headlight. On other 70’s mopeds, when their head light burns out, the tail light gets super bright, and dies.
Furthermore on mopeds with a Bosch 90mm magneto with grey tail light wire, such as Puch, Batavus, Colombia, the headlight bulb is preferably a 6 volt 21 watt (#1129). If it’s a 12 volt 21 watt (#1156), the headlight won’t be as bright, and since it passes less current, the tail light won’t be as bright either. That’s weird. Besides that the tail light bulb needs to be a 6 volt 5 watt #63, or else it will be dim, especially at idle.