Modern Vespa

Most of the times when we get hold of a vintage Vespa, the wiring is shot. Most of us would just buy a new loom, but some of us like to do our own thing. If you want to convert your vintage Vespa to 12V and need a new wiring loom, you can use the attached diagram. It has the correct colours, lengths and connections.

(To convert a 6V stator to 12V, is quite simple. There are three coils on a 6V stator: a spark coil and two lighting coils. The lighting coil with the yellow and blue wire produces 12V. Throw the other lighting coil away and fit another 12V coil in its place. Then connect the two blue wires. You now have three wires coming from the stator: red to the external ignition coil and kill switch, black to earth and blue to the voltage regulator).

The "codes" on the wiring diagram means the following:
FM means a female medium connection
FL means a female large connection
d3 means a round connection with a 3mm hole etc
ST means shrink tubing

Wiring loom Sprint 12V.pdf
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Filename:	Wiring loom Sprint 12V.pdf
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I forgot to mention that you start with a. The values to the left is how far the wires must protrude from the a shrink tubing.