1. Introduzione
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your X-PRO 125cc 4-Stroke ATV Engine Motor with Automatic Transmission and Electric Start. Please read this manual thoroughly before installation and use to ensure proper function and longevity of the engine. Retain this manual for future reference.
2. Informazioni sulla sicurezza
Dare sempre priorità alla sicurezza quando si lavora con i motori. Il mancato rispetto delle istruzioni di sicurezza può causare gravi lesioni o danni al motore.
- Assicurarsi che il motore sia freddo prima di eseguire qualsiasi operazione di manutenzione o installazione.
- Disconnect the spark plug wire before working on the engine to prevent accidental starting.
- Indossare adeguati dispositivi di protezione individuale (DPI), tra cui guanti e protezioni per gli occhi.
- Lavorare in un'area ben ventilata, soprattutto quando si maneggia carburante o gas di scarico.
- Keep flammable materials away from the engine during operation and maintenance.
- Refer to the ATV's specific manual for chassis-related safety guidelines.
3. Prodotto finitoview
The X-PRO 125cc engine is a robust 4-stroke, single-cylinder unit designed for ATVs, featuring an automatic transmission and electric start for convenience. It is air-cooled and utilizes CDI ignition.

Figura 3.1: Superiore view of the X-PRO 125cc engine motor, showcasing the main unit and accompanying accessories such as the intake manifold and hardware.

Figura 3.2: Lato view of the X-PRO 125cc engine, highlighting the cooling fins and general engine casing.

Figura 3.3: Davanti view of the X-PRO 125cc engine, showing the spark plug and cylinder head area.
4. Configurazione e installazione
Proper installation is crucial for engine performance and safety. If you are unsure about any step, consult a qualified mechanic.
4.1 Controlli pre-installazione
- Compatibilità: Verify that the engine's mounting points and electrical connectors are compatible with your ATV chassis. Pay special attention to the electrical plug-in. If not compatible, an adapter may be required.
- Livelli dei fluidi: Ensure the engine oil is at the correct level before initial start-up. The lubrication capacity is 900ml (0.20 Gallon) of SF15W/40-SE oil.
- Sistema di alimentazione: Inspect the fuel lines and carburetor for any obstructions or damage.
4.2 collegamenti elettrici
Connect the engine's wiring harness to the ATV's electrical system. Ensure all connections are secure and free from corrosion.

Figura 4.1: Detail of the engine's electrical connector, which must be properly matched to the ATV's wiring harness.
4.3 Montaggio del motore
Secure the engine to the ATV frame using appropriate mounting hardware. Ensure all bolts are tightened to the manufacturer's specifications for the ATV chassis.
5. Istruzioni per l'uso
5.1 Avviamento del motore
- Ensure the ATV is in neutral and the parking brake is engaged.
- Girare la chiave di accensione in posizione "ON".
- If the engine is cold, engage the choke.
- Premere il pulsante di avviamento elettrico. Rilasciarlo una volta avviato il motore.
- Allow the engine to warm up for a few minutes before riding. Disengage the choke as the engine warms.
5.2 Riding with Automatic Transmission
This engine features an automatic transmission. Simply apply throttle to move forward. The transmission will automatically adjust gears based on speed and load.
5.3 Spegnimento del motore
To turn off the engine, simply turn the ignition key to the "OFF" position.
6. Manutenzione
Regular maintenance is essential for the longevity and optimal performance of your engine.
6.1 Olio motore
- Controllare il livello dell'olio: Check the engine oil level before each ride.
- Cambio dell'olio: Change the engine oil after the first 20 hours of operation, and then every 50-100 hours or annually, whichever comes first. Use SF15W/40-SE lubrication model oil. The capacity is 900ml (0.20 Gallon).
6.2 Candela
- Ispezione: Inspect the spark plug (Model: A7TC) every 100 hours or annually. Clean or replace if necessary.
- distanza: Ensure the spark plug gap is set to the manufacturer's specification.
6.3 Filtro aria
Clean or replace the air filter regularly, especially when operating in dusty conditions. A clogged air filter can reduce engine performance and lifespan.
6.4 Sistema di alimentazione
Use unleaded gasoline with an octane rating of 87# or higher. Periodically check fuel lines for cracks or leaks.
7. Risoluzione Dei Problemi
Questa sezione fornisce soluzioni ai problemi più comuni che potresti riscontrare.
| Problema | Possibile causa | Soluzione |
|---|---|---|
| Il motore non si avvia | No fuel, weak battery, faulty spark plug, electrical connection issue. | Check fuel level, charge/replace battery, inspect/replace spark plug, verify all electrical connections. |
| Il motore funziona male/manca potenza | Clogged air filter, dirty carburetor, incorrect fuel, old spark plug. | Clean/replace air filter, clean carburetor, use fresh 87#+ fuel, replace spark plug. |
| Fumo eccessivo dallo scarico | Incorrect oil level, worn engine components. | Check oil level and type. If issue persists, consult a mechanic. |
| Il motore si surriscalda | Insufficient airflow (air-cooled), low oil level. | Ensure cooling fins are clean and unobstructed. Check oil level. |
8. Specifiche
| Caratteristica | Dettaglio |
|---|---|
| Modello motore | 308-999037 |
| Tipo di motore | Single Cylinder, 4-Stroke, 2-Valve |
| Cylinder Working Volume | 120ml (0.03 Gallon) |
| Bore & Stroke | 54 mm x 49.5 mm (2.13" x 1.95") |
| Rapporto di compressione | 9.0:1 |
| Sistema di raffreddamento | Raffreddato ad aria |
| Metodo di accensione | CDI (Ignition Type: CFW) |
| Antipasto | Avviamento elettrico |
| Trasmissione | Trasmissione automatica |
| Frizione | Automatic Multi-plate Wet Clutch |
| Potenza massima | 7.64HP / 5.7KW at 7000-8000 Rpm |
| Coppia massima | 8.0N.m at 5000-6000 Rpm |
| Min. Stable Idle Speed | 1350-1650 giri/min |
| Rifornimento di carburante | Carburetor Atomization (Carburetor Model: PZ22, Type: Plunger) |
| Carburante raccomandato | Unleaded Gasoline, Octane No. >= 87# |
| Min. Fuel Consumption | 367g/Kw.h (9.65oz/HP.h) |
| Metodo di lubrificazione | Pressure/splash |
| Lubrication Model | SF15W/40-SE |
| Lubrication Capacity | 900ml (0.20 Gallon) |
| Modello della candela | Modello A7TC |
| Materiale | Alluminio |
| Peso dell'articolo | 65 libbre |
| Voltage | 12 Volt |
| Cosatage | 5.7 kW |
9. Garanzia e supporto
For specific warranty information, please refer to the documentation provided at the time of purchase or contact X-PRO customer support directly. Keep your purchase receipt as proof of purchase.
For technical assistance or parts inquiries, please visit the official X-PRO website or contact their customer service department. You can often find support resources, FAQs, and contact information on the brand's official online store or support pages.
X-PRO Store Link: Visit the X-PRO Store on Amazon
