Cable harness BGM ORIGINAL suitable for all Vespa PX models up to year of construction 1982

You can now easily convert your old Vespa PX with battery

A modern electrical system without a battery on your scooter does not destroy the optics, it is a invisible and economical additional gain in security and comfort, then

  • Without a battery, there is no need to purchase / replace or maintain the battery
  • Your electrics and all consumers work regardless of the condition or charge level of the battery
  • You efficiently prevent corrosion damage to your Vespa PX from battery / battery acid that has boiled over
  • Significantly more safety through increased light output = increased visibility = better to be seen & and better seeing



Conversion wiring harness for all Vespa PX models built up to 1982

This wiring harness is perfect for connecting your Vespa PX, which has a battery from the Piaggio factory, to a modern and maintenance-free  Electrical system retrofitting without battery. We offer an inexpensive and practical set with all the new switches and ignition lock you need (BGM6685KT).

In addition, this is for an exchange / restoration of the PX wiring harness in the Italian version for models without battery. In this case, the indicators, the horn (so-called buzzing) and all other consumers are supplied with power directly via the AC on-board network. The ignition base plate used in these vehicles is suitable for this with only 3 cables (contact ignition models) or 5 cables (vehicles with electronic ignition).

Vehicle models:

Vespa PX battery-free: conversion without battery

For the conversion of your scooter to the modern electrics, you need the following parts and in the future you will save the battery, the wintering and the care / maintenance of the vehicle battery

    Basically, the simple 3-pin voltage regulator (G | G | M) is used with this wiring harness (e.g. 9100001). The originally used 5-pin voltage regulator (A | A | B + | G | M) can still be used in vehicles that were delivered from the factory with a battery. Only connections B + and G remain unoccupied (formerly charging current for the battery). A better alternative is the compact and powerful BGM Pro voltage regulator (BGM6690). This can, for example, also supply a USB socket with 12V DC voltage for charging the mobile phone / navigation system etc.
    The type with 5 cables is used as the ignition base plate (also recognizable by the blue and black cables for the single power supply). The original 7-wire Lima of the battery models can no longer be used. However, due to their age, these very often show damage to the cable insulation anyway. A conversion to the more powerful ignition base plate of the later Lusso models (e.g. BGM8025N or BGM8032N) is therefore highly recommended. This increases the overall light output of the AC network considerably, as no more electricity is diverted to charge the battery. This means that old PX models can also be equipped with a 35 / 35W lamp. Most 5-wire alternators have a circular connector. The wiring harness offered here has (as in the Italian original) 6,3mm flat plugs. Either the wiring harness can be converted to a circular connector or the ignition base plate to a flat connector. The necessary parts can be found in the accessories.
    The battery models use a DC (direct current) flasher relay.
    After the conversion, an AC (alternating current) flasher relay is required (e.g. 1195703).
    The following will help you connect the cables Instructions / wiring diagram.

Checklist: Spare parts / parts that are connected to the wiring harness

In order for everything to work, you should go through this list and check that your old parts are still OK. If not, you can order them directly in our Vespa shop using the link:

* 9512115? 9520072 + 9520074 / ** 9512027? 7675200 + 7675201

CONCLUSION: Absolutely sensible conversion to modern, more powerful and maintenance-free electrics


Tutorial installation wiring harness video instructions

This is a PX Lusso harness, it has different connections, so don't get confused. The basic principle of the pull-in is the same and this video tutorial may help you to route and connect the wiring harness in the body of your Vespa.


Tutorial SC - Vespa PX Lusso wiring harness Instructions assembly Installation Vespa wiring harness