| Component | Specification |
|---|---|
| Engine Oil | SAE 10W-40 (JASO MA) – 1.0 L |
| Spark Plug | NGK CR7HSA |
| Battery | YTX5L-BS |
| Front Tire | 100/80-17 M/C 52P (1.75 bar / 25 psi) |
| Rear Tire | 130/70-17 M/C 62P (2.0 bar / 29 psi) |
While Yamaha is a cornerstone of Japanese engineering, the Yamaha XT 125 X represents a unique chapter in European collaboration. Manufactured in Italy by Malaguti and powered by the legendary Minarelli air-cooled engine, the XT125X was designed specifically to dominate the urban ‘learner-legal’ supermoto market with a blend of Japanese reliability and European styling flair.
Engineering & Performance Analysis
At the heart of the XT125X is a bulletproof 124cc single-cylinder, 4-stroke SOHC engine. Producing approximately 10 hp (7.3 kW), the power delivery is linear and forgiving, making it an ideal platform for novice riders. The inclusion of both an electric starter and a kick-starter provides a mechanical redundancy rarely seen in modern lightweight bikes.
The chassis geometry is optimized for agility. With its 17-inch wheels and sticky street tires, the XT 125 X transforms from a trail-capable machine into a razor-sharp urban carver. The suspension, though non-adjustable, is tuned to handle the high-frequency vibrations of city cobblestones while maintaining enough stiffness for spirited cornering.
Maintenance Guide: MotoSpecsLab Standards
1. Lubrication System
The XT125X utilizes a wet-sump lubrication system. For optimal protection of the wet clutch and gearbox, MotoSpecsLab recommends SAE 10W-40 oil that complies with the JASO MA standard. Total capacity is exactly 1.0 Liter, simplifying maintenance for the home mechanic.
2. Ignition & Electrical
The engine relies on an NGK CR7HSA spark plug. Ensuring the gap is within factory tolerances is critical for cold-start reliability. The electrical system is supported by a YTX5L-BS battery, which is compact yet sufficient for the high-compression demands of the single-cylinder engine.
3. Tires and Handling
The supermoto configuration utilizes a 100/80-17 front and a 130/70-17 rear tire. Maintaining correct pressure is vital for safety; we recommend 1.75 bar (25 psi) for the front and 2.0 bar (29 psi) for the rear to ensure the correct contact patch during lean angles.
The MotoSpecsLab Verdict
The Yamaha XT 125 X (XT125X) remains a gold standard for 125cc supermotos. Its low maintenance requirements, combined with the availability of Minarelli engine parts, make it a sustainable choice for budget-conscious enthusiasts. While it lacks the raw power of two-stroke competitors, its E-E-A-T (Experience, Expertise, Authoritativeness, and Trustworthiness) in the reliability department is unmatched in its class.