Introduction
Welcome to the X-PRO 125cc Adult Gas Motorcycle instruction manual. This guide provides essential information for the safe assembly, operation, maintenance, and troubleshooting of your new motorcycle. Please read this manual thoroughly before operating the vehicle to ensure your safety and the longevity of the product.
This motorcycle is designed for street use only and cannot be ridden on highways. Always adhere to local traffic laws and regulations.
Safety Information
Your safety is paramount. Always wear appropriate safety gear, including a helmet, eye protection, gloves, and protective clothing, when operating the motorcycle. Ensure all components are securely fastened and in good working order before each ride.
- Always wear a DOT-approved helmet.
- Perform pre-ride inspections.
- Do not operate under the influence of alcohol or drugs.
- Observe all traffic laws and speed limits.
- This motorcycle is for street use only; not for highway use.
Setup and Assembly
The X-PRO 125cc motorcycle requires some assembly upon arrival. Follow these steps carefully. It is recommended to have two people for certain steps.
Uncrating the Motorcycle
Carefully cut the straps and remove the cardboard packaging from the metal frame. Once the cardboard is removed, unbolt the metal frame pieces to free the motorcycle. Be cautious as the motorcycle may shift once the frame is disassembled.

Image: The X-PRO 125cc motorcycle securely packaged within its metal frame and cardboard shipping crate.
Rear Wheel Installation
The rear wheel is typically shipped detached. Carefully align the wheel with the rear swingarm and insert the axle. Ensure the brake caliper aligns correctly with the disc. Secure the axle nut tightly using appropriate tools.

Image: Rear view of the X-PRO 125cc motorcycle, showcasing the rear wheel and disc brake assembly.
Front Wheel and Fender Installation
Attach the front wheel to the forks, ensuring the brake disc slides into the caliper. Secure the axle and then install the front fender over the wheel, fastening it to the fork mounts. Finally, attach the front reflectors to the forks.

Image: Front view of the X-PRO 125cc motorcycle, highlighting the front wheel, fender, and headlight.
Handlebar and Mirror Installation
Mount the handlebars to the triple clamp, ensuring they are centered and tightened securely. Install the rearview mirrors into their designated mounts on the handlebars. Adjust them for optimal rear visibility.

Image: Side profile of the X-PRO 125cc motorcycle, showing the handlebars and overall design.
Assembly Video Guide
For a visual guide on the assembly process, please refer to the official X-PRO assembly video below:
Video: Official X-PRO 125cc motorcycle assembly video, demonstrating the uncrating, wheel, fender, and mirror installation steps.
Operating Instructions
Pre-Ride Checklist
- Check tire pressure (12-inch wheels).
- Verify brake functionality (front and rear disc brakes).
- Inspect chain tension and lubrication.
- Ensure all lights (headlight, taillight, turn signals) are working.
- Check fuel level (gasoline).
- Confirm mirrors are properly adjusted.
Starting the Engine
- Turn the fuel valve to the "ON" position.
- Insert the key into the ignition and turn it to the "ON" position.
- If cold, pull the choke lever (if equipped).
- Press the electric start button or use the kick-start lever.
- Once started, allow the engine to warm up for a few moments.
- Push the choke lever back to the "OFF" position once the engine is running smoothly.
Riding the Motorcycle
Familiarize yourself with the controls before riding. The motorcycle features a twist-grip gear shifter. Engage the clutch, select first gear, and slowly release the clutch while applying throttle to move forward. Practice braking and turning in a safe, open area before riding on public roads.
Maintenance
Regular maintenance is crucial for the performance and safety of your X-PRO 125cc motorcycle.
- Oil Changes: Change engine oil regularly as per the maintenance schedule (refer to a more detailed service manual if available).
- Chain Maintenance: Keep the drive chain clean, lubricated, and properly tensioned.
- Brake Inspection: Periodically check brake pads for wear and brake fluid levels.
- Tire Care: Maintain correct tire pressure and inspect tires for wear or damage.
- Fastener Checks: Regularly check and tighten all nuts and bolts, especially after initial rides.
Troubleshooting
This section covers common issues you might encounter and their potential solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine won't start | No fuel, fuel valve off, dead battery, spark plug issue. | Check fuel level, turn fuel valve on, charge/replace battery, inspect spark plug. |
| Poor braking performance | Worn brake pads, low brake fluid, air in brake lines. | Inspect/replace pads, top up fluid, bleed brake lines (professional recommended). |
| Chain noise/slipping | Loose chain, dry chain, worn sprockets. | Adjust chain tension, lubricate chain, inspect sprockets for wear. |
If you encounter issues not listed here or cannot resolve a problem, please contact X-PRO customer support.
Specifications
Key specifications for the X-PRO 125cc Adult Gas Motorcycle (Model: MC-NN20):
- Bike Type: Motorized Bike
- Age Range: Adult
- Brand: X-PRO
- Color: Black (as per current product variant)
- Wheel Size: 12 Inches
- Frame Material: Aluminum or Steel
- Suspension Type: Rear, Front
- Special Feature: Headlight
- Included Components: Motorcycle (some assembly required)
- Brake Style: Disc (Front and Rear)
- Specific Uses: Street
- Model Name: MC-NN20
- Power Source: Internal Combustion Engine
- Maximum Weight Recommendation: 330 Pounds
- Minimum User Height: 30 Inches
- Assembly Required: Yes
Warranty and Support
Your X-PRO 125cc motorcycle comes with a 1-month warranty. For any warranty claims, technical support, or parts inquiries, please contact X-PRO customer service directly.
You can visit the official X-PRO store for more information and support: X-PRO Store on Amazon.





