The electrical circuit of a Siambretta or Lambretta is the part of the scooter seen by many as a “Tabu Issue”. In this article you will find all the Siambretta’s electrical diagrams, many of them in their original version -as you can find it on the manuals- as well as many other with some improvements and additions, in order to feel closer with this misunderstood topic and you can get the better performance of your Siambretta.
Moreover, at the end of this page, you will find a video tutorial where all this circuits are explained from the basics.
Siambretta 125 D/LD, Siambretta 150 LD
Original Scooter’s circuit, taken from the instructions manual of both models, with some addings for better understanding.
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| Original electrical diagram of Siambretta 125D/LD and Siambretta 150 LD |
Adapted circuit supporting battery and brake light. Modification by El Siambrettista based on the original circuit from the manual.
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| Improved electrical diagram of Siambretta 125D/LD and Siambretta 150 LD, with battery and brake light |
Siambretta 125/150 Motofurgon (FD)
Original Scooter’s circuit, taken from the instructions manual.
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| Original electrical diagram of Siambretta 125/150 Motofurgon (FD) |
Siambretta 48
Original Scooter’s circuit, taken from the instructions manual.
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| Original electrical diagram of Siambretta 48 |
Siambretta 150 LI
Simplified circuit, based on the Siambretta 125 D fisonomy, without battery. Modification by El Siambrettista based on the electrical diagram from ScooterHelp.
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| Simplified electrical diagram for Siambretta 150 LI, without battery |
Simplified circuit, based on the Siambretta 125 D fisonomy, with battery. Modification by El Siambrettista based on the electrical diagram from ScooterHelp.
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| Simplified electrical diagram for Siambretta 150 LI, with battery |
Original circuit. Modification by El Siambrettista based on the electrical diagram from ScooterHelp.
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| Original electrical diagram of Siambretta 150 LI |
Siambretta 175 TV
Simplified circuit, based on the Siambretta 125 D fisonomy, without battery. Modification by El Siambrettista based on the electrical diagram from ScooterHelp.
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| Simplified electrical diagram for Siambretta 175 TV, without battery |
Simplified circuit for the 7-wire CasaLambretta light switch, based on the Siambretta 125 D fisonomy, with battery. Modification by El Siambrettista based on the electrical diagram from ScooterHelp.
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| Simplified electrical diagram for Siambretta 175 TV, with battery |
Original circuit for the 9-wire light switch. Modification by El Siambrettista based on the electrical diagram from ScooterHelp.
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| Original electrical diagram of Siambretta 175 TV |
Siambretta 175 AV
Original Scooter’s circuit, taken from the instructions manual.
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| Original electrical diagram of Siambretta 175 AV |
Video Tutorial
In our YouTube channel you will find this video explaining the basic concepts of any Siambretta electrical diagram, in order to get a better understanding and create your own electrical circuit for your scooter, in adtition of some tricks and ideas to get it perfect and cheap.
Downloads
Finally, you can download all the electrical diagrams in this article, in printing-ready high definition, in the table below.
| Scooter | Electrical Diagram |
|---|---|
| Siambretta 125D/LD and Siambretta 150 LD (original) |  |
| Siambretta 125D/LD and Siambretta 150 LD (with battery) |  |
| Siambretta 125/150 Motofurgon (original) |  |
| Siambretta 48 (original) |  |
| Siambretta 150 LI (simplified, without battery) |  |
| Siambretta 150 LI (simplified, with battery) |  |
| Siambretta 150 LI (original) |  |
| Siambretta 175 TV (simplified, without battery) |  |
| Siambretta 175 TV (simplified, with battery) |  |
| Siambretta 175 TV (original) |  |
| Siambretta 175 AV (original) |  |
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