1. Introducció
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. Informació de seguretat
Always prioritize safety when working with engines. Failure to follow safety instructions can result in serious injury or damage to the engine.
- Ensure the engine is cool before performing any maintenance or installation.
- Disconnect the spark plug wire before working on the engine to prevent accidental starting.
- Utilitzeu l'equip de protecció individual (EPI) adequat, incloent-hi guants i protecció ocular.
- Work in a well-ventilated area, especially when dealing with fuel or exhaust fumes.
- Keep flammable materials away from the engine during operation and maintenance.
- Refer to the ATV's specific manual for chassis-related safety guidelines.
3. Producte acabatview
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: A dalt 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: lateral view of the X-PRO 125cc engine, highlighting the cooling fins and general engine casing.

Figura 3.3: Davant view of the X-PRO 125cc engine, showing the spark plug and cylinder head area.
4. Configuració i instal·lació
Proper installation is crucial for engine performance and safety. If you are unsure about any step, consult a qualified mechanic.
4.1 Comprovacions prèvies a la instal·lació
- Compatibilitat: 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.
- Nivells de líquids: 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 de combustible: Inspect the fuel lines and carburetor for any obstructions or damage.
4.2 Connexions elèctriques
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 Muntatge del motor
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. Instruccions de funcionament
5.1 Arrencada del motor
- Ensure the ATV is in neutral and the parking brake is engaged.
- Gireu la clau d'encesa a la posició "ON".
- If the engine is cold, engage the choke.
- Press the electric start button. Release once the engine starts.
- 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 Apagat del motor
To turn off the engine, simply turn the ignition key to the "OFF" position.
6. Manteniment
Regular maintenance is essential for the longevity and optimal performance of your engine.
6.1 Oli de motor
- Comprovar el nivell d'oli: Check the engine oil level before each ride.
- Canvi d'oli: 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 bugia
- Inspecció: Inspect the spark plug (Model: A7TC) every 100 hours or annually. Clean or replace if necessary.
- Escletxa: Ensure the spark plug gap is set to the manufacturer's specification.
6.3 Filtre d'aire
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 de combustible
Use unleaded gasoline with an octane rating of 87# or higher. Periodically check fuel lines for cracks or leaks.
7. Solució De Problemes
Aquesta secció ofereix solucions a problemes comuns que podeu trobar.
| Problema | Causa possible | Solució |
|---|---|---|
| El motor no arrenca | No fuel, weak battery, faulty spark plug, electrical connection issue. | Check fuel level, charge/replace battery, inspect/replace spark plug, verify all electrical connections. |
| El motor funciona malament/falta potència | Clogged air filter, dirty carburetor, incorrect fuel, old spark plug. | Clean/replace air filter, clean carburetor, use fresh 87#+ fuel, replace spark plug. |
| Excés de fum de l'escapament | Incorrect oil level, worn engine components. | Check oil level and type. If issue persists, consult a mechanic. |
| El motor es sobreescalfa | Insufficient airflow (air-cooled), low oil level. | Ensure cooling fins are clean and unobstructed. Check oil level. |
8. Especificacions
| Característica | Detall |
|---|---|
| Model de motor | 308-999037 |
| Tipus de motor | 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") |
| Relació de compressió | 9.0:1 |
| Sistema de refrigeració | Refrigerat per aire |
| Mètode d'encesa | CDI (Ignition Type: CFW) |
| Arrancador | Arranjament elèctric |
| Transmissió | Transmissió automàtica |
| Embragatge | Automatic Multi-plate Wet Clutch |
| Potència màxima | 7.64HP / 5.7KW at 7000-8000 Rpm |
| Màx. Parell | 8.0N.m at 5000-6000 Rpm |
| Min. Stable Idle Speed | 1350-1650 r/min |
| Subministrament de combustible | Carburetor Atomization (Carburetor Model: PZ22, Type: Plunger) |
| Combustible recomanat | Unleaded Gasoline, Octane No. >= 87# |
| Min. Fuel Consumption | 367g/Kw.h (9.65oz/HP.h) |
| Mètode de lubricació | Pressure/splash |
| Lubrication Model | SF15W/40-SE |
| Lubrication Capacity | 900ml (0.20 Gallon) |
| Model de bugia | A7TC |
| Material | Alumini |
| Pes de l'article | 65 lliures |
| Voltage | 12 Volts |
| Wattage | 5.7 KW |
9. Garantia i Suport
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






