MOPED ARMY

Vespa Wiring Simplified. <------ Here is a post on simple wiring of a vespa moped. You can rewire with just three wires. Don't used the wire connected to the third coil for the battery. The headlight, taillight, and horn should run off the light coil.

If you ground the black wire from the engine that connects to the blue wire, you wont have to worry about no spark if the brake light bulb goes out. But then you won't have a brake light and only a running taillight.

The battery is for turn signals only... It does not matter if it's dead either, bike will still function and ride. (edited)

Don't cut any cable. See if the blinkers work with the battery cables disconnected. If so tape and hide the unused cables.

Don't ever give up a brake light. U r so lucky to have oem turn signals. Embrace it.

If you have the stock harness, I would leave that in.

There should be a third coil to power the battery/turn signals. I would tape or cap that power wire so it won't ground out. Then find some way to tuck the other wires away after removing the signals, battery, and boxes. Avoid cutting the stock wire harness and hold onto the signals and battery boxes just in case you want to put them back on in the future.

That's what I would do.