| Component | Specification |
|---|---|
| Production Years | 2010 – 2013 |
| Engine Oil | SAE 10W-40 API SG/JASO MA (1.3 L) |
| Front Tire | 120/70-15 M/C 56P |
| Rear Tire | 140/70-14 M/C 68P |
| Tire Pressure | F: 2.0 bar (29 psi) / R: 2.25 bar (33 psi) |
| Battery Type | YT10B-4 |
| Spark Plug | NGK DR8EA |
Historical Engineering Highlight: The SG26 generation of the Yamaha X-MAX 250 represented a pivotal moment in the “Sport-Scooter” segment. Unlike its predecessors, the SG26 utilized a rigid backbone frame specifically tuned to mirror the handling characteristics of the larger TMAX 500, bridging the gap between urban utility and high-speed stability through a unique engine-mounting system that reduced unsprung weight.
Technical Engineering Overview
The Yamaha YP 250 R X-MAX (SG26) is powered by a liquid-cooled, 4-stroke, single-cylinder SOHC engine. This iteration focused heavily on refinement and Euro 3 compliance. The integration of the ABS system in this generation utilized a sophisticated electronic control unit that adjusted braking pressure based on wheel-speed differential, a feature that significantly enhanced safety on wet European cobblestones.
Maintenance & Service Protocol
Lubrication System
For optimal engine longevity, the SG26 requires 1.3 liters of SAE 10W-40 oil. It is critical to use oil meeting JASO MA standards to ensure the internal components are protected against high-shear conditions common in CVT-driven powertrains.
Chassis & Tires
The SG26 runs on a 15-inch front wheel and a 14-inch rear wheel, a configuration chosen to provide a balance between agility and storage capacity under the seat. Correct inflation is vital for handling: 2.0 bar (29 psi) in the front and 2.25 bar (33 psi) in the rear.
Electrical & Ignition
The electrical system relies on a YT10B-4 battery. Reliable ignition is provided by the NGK DR8EA spark plug. Given the fuel-injected nature of the SG26, maintaining a healthy battery is essential for the fuel pump’s initial priming sequence.
MotoSpecsLab Editorial Verdict
The Yamaha X-MAX 250 SG26 remains a benchmark for mid-sized scooters. Its engineering focus on frame rigidity and high-quality suspension components makes it a favorite for commuters who refuse to sacrifice riding dynamics. From a maintenance perspective, the SG26 is remarkably accessible, provided the technician adheres to the specific fluid and pressure requirements outlined above.
Frequently Asked Questions
What spark plug does the X-MAX 250 SG26 use?
The manufacturer specifies the NGK DR8EA for this model to ensure correct heat dissipation and ignition timing.
How much oil is needed for an oil change?
A standard oil change requires 1.3 liters of SAE 10W-40 oil.