Voltage regulator -DUCATI Energia- 5-Pin 12 V (G-G-B+-C-Ground) - Vespa PX, Cosa and PK XL2 with electric starter
This 12 V voltage regulator comes from DUCATI Energia in Italy - the OEM manufacturer that was used on many Piaggio models ex works. It ensures a stable on-board voltage, a clean battery charge and reliably protects the electrical system from voltage peaks.
OEM DUCATI Energia
5-pin 12 V
G-G-B+-C ground
For electric starters
Protects battery and lamps
What is the regulator responsible for?
On Vespa models with a battery and electric starter, the voltage regulator plays a key role: it keeps the on-board voltage within a safe range so that lights do not burn out, the battery is charged correctly and consumers function reliably. If the regulator is tired or defective, typical symptoms such as flickering lights, noticeably short bulb life, low battery charge or sporadic electrical failures can be seen.
Why OEM quality from Ducati Energia?
Constant and resilient: OEM regulators are designed for the standard electrical load and everyday operation.
Clean voltage limiting: reduces voltage peaks, which can occur particularly at high engine speeds.
Suitable connection logic: 5-pin version with defined assignment for battery, consumer and ground.
Connections and installation instructions
This regulator is designed as a 5-pin 12 V version. The pin assignment is: G - G - B+ - C - ground.
G and G: Generator connections (input from the alternator)
B+: Battery plus (charging output)
C: Output to the consumers (vehicle electrical system)
Ground: regulator housing and ground cable, important for reliable function
Note: Always check the pin assignment and wiring harness before replacing. There are optically similar regulators with different pin assignments. A good earth connection is mandatory, otherwise charging problems or flickering will continue to occur.
Technical data
- Type: Voltage regulator 5-pin
- Vehicle electrical system: 12 V
- Connections: G - G - B+ - C - Ground
- Manufacturer: DUCATI Energia (Italy)
- Application: Models with battery and electric starter
Suitable vehicle models
| Vehicle model |
Note |
| Vespa PX with electric starter (from model year 1998) | 12 V, battery, 5-pin regulator G-G-B+-C ground |
| Vespa Cosa | with electric starter and battery |
| Vespa Cosa 2 | with electric starter and battery |
| Vespa PK XL2 | with electric starter and battery |
Tip: The connection assignment and the existing wiring harness are decisive. For conversions or different ignition systems, please check the wiring diagram beforehand.
Conclusion
If you are looking for a high-quality and reliable 12 V voltage regulator for Vespa models with battery and electric starter, the DUCATI Energia 5-pin regulator is the clean OEM solution. It stabilizes the on-board voltage, protects the electrical system and ensures reliable charging in everyday use.
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