Yamaha XT 125 X (2005) — Specs
Identity
Manufacturer: Yamaha
Model: XT 125 X
Category: Motorcycle
Type: Motorcycle
Years: 2005 →
Engine
Displacement (cc): 124
Cylinders: 1
Power (hp): 12
Power (kW): 9.2
Torque (Nm): 11
Dimensions
Overall length: 1950 mm
Overall width: 720 mm
Overall height: 1110 mm
Wheelbase: 1340 mm
Ground clearance: 150 mm
Weight (kg): 118
Seat height (mm): 860
Tank (L): 10
Tires
Front tire: 2.75-21
Rear tire: 4.10-18
Front pressure (bar): 1.8
Rear pressure (bar): 1.9
Drivetrain
Drive chain: 420 chain, 126 links
Sprockets (front / rear): 14 / 48
Ignition
Spark plug: NGK CR7HSA
Plug gap: 0.8 mm
Fluids & Filters
Engine oil: SAE10W-40, API SE
Engine oil (without filter, L): 1
Oil filter: Hiflofiltro HF143
Air filter: Hiflofiltro HFA4104
Brake fluid: DOT 4
Fuel consumption
Estimated range: ~400 km on a full tank (10.0 L)
Service
Battery: YTX9-BS
Service interval (km): 6000
Service interval (months): 12
Valve check (km): 12000
Parts and consumables for this motorcycle
Data is gathered with care, but without guarantee. Always confirm critical information with your dealer or workshop.
Service notes
Service interval: every 6,000 km or 12 months, whichever comes first. Valve clearance check every 12,000 km. Valve clearance — intake 0.08-0.12 mm cold, exhaust 0.10-0.14 mm cold. Engine oil: oil grade SAE10W-40, API SE, 1 L without filter change. Spark plug: NGK CR7HSA (gap 0.8 mm). Brake fluid: DOT 4. Chain: 126 links, sprockets 14/48 teeth. Tire pressure: front 1.8 bar, rear 1.9 bar (cold). Tire size: front 2.75-21, rear 4.10-18. Always confirm critical values with the workshop manual or an authorised dealer.
OEM and quality aftermarket parts that fit this bike. Always confirm with your dealer before ordering.
Engine oil
Spec: SAE10W-40, API SE, 1.0 L (without filter)
- OEM OEM recommended engine oil (SAE 10W-40)
- Premium Motul 7100 4T (100% Synthetic, Ester)
- Premium Motul 5100 4T Technosynthese (Semi-Synthetic)
Which Motul for this bike?
| Motul 7100 4T ✓ | Motul 5100 4T | |
|---|---|---|
| Product | Motul 7100 4T — 100% fully synthetic | Motul 5100 4T — semi-synthetic |
| Best for | Sport, Naked, Adventure (600cc+), track | Standard, Cruiser, Scooter, daily use |
| RPM protection | Excellent — ester base, stable under load | Good — for normal riding conditions |
- Standard Repsol Moto Racing 4T (Synthetic)
- Standard Elf Moto 4 Tech (Semi-Synthetic)
Fully Synthetic vs Semi-Synthetic
| Fully Synthetic | Semi-Synthetic | |
|---|---|---|
| Base oil | 100% chemical synthesis (ester or PAO) | Mineral oil + synthetic additives |
| Heat resistance | Excellent — stable at extreme heat & RPM | Good — suitable for normal temperatures |
| Cold start | Better — reaches engine faster when cold | Good — adequate for normal climates |
| Change interval | Longer (up to 10,000 km) | Shorter (5,000–7,000 km typical) |
| Price | Higher | Lower |
Oil filter
Spec: Hiflofiltro HF143
- Premium Hiflofiltro HF143
- Premium K&N KN-143
Air filter
Spec: Hiflofiltro HFA4104
- Standard Hiflofiltro HFA4104
Spark plug
Spec: NGK CR7HSA, gap 0.8 mm
- OEM NGK CR7HSA
- Premium NGK CR7HIX
- Standard NGK CR7HSA
Front brake pads
Spec: OEM front pad (EBC equivalent: FA181HH)
- Premium EBC FA181HH
- Standard EBC FA181 (organic)
Rear brake pads
Spec: OEM rear pad (EBC equivalent: FA192HH)
- Premium EBC FA192HH
- Standard EBC FA192 (organic)
Drive chain
Spec: 126 links | Sprockets 14/48 teeth / 126 links
Front tire
Spec: 2.75-21, 1.8 bar
- OEM OEM 2.75-21
Rear tire
Spec: 4.10-18, 1.9 bar
- OEM OEM 4.10-18
Battery
Spec: OEM battery: Yuasa YTX9-BS
- Premium Yuasa YTX5L-BS or YT4B-BS (typical 50-125cc)
Brake fluid
Spec: DOT 4
- Standard TotalEnergies HBF4
Coolant
Service interval
Spec: 6 000 km / 12 months
- OEM Engine oil + oil filter change
- OEM Air filter inspection
- OEM Spark plug check
- OEM Brake fluid replacement: every 2 years
Valve check
Spec: 12 000 km
- OEM Intake clearance: 0.08-0.12 mm cold
- OEM Exhaust clearance: 0.10-0.14 mm cold
Suspension
Spec: 36 mm / 285 ml SAE 10W
- OEM Fork: 36 mm
- OEM Fork oil grade: 285 ml SAE 10W
