Yamaha YZF-R 125 (EURO 4) (2017–2018) — Specs
Identity
Manufacturer: Yamaha
Model: YZF-R 125 (EURO 4)
Category: Sport
Type: Motorcycle
Years: 2017 → 2018
Engine
Displacement (cc): 125
Cylinders: 1
Power (hp): 15
Power (kW): 11
Torque (Nm): 11.5
Dimensions
Overall length: 2080 mm
Overall width: 730 mm
Overall height: 1110 mm
Wheelbase: 1410 mm
Ground clearance: 130 mm
Weight (kg): 142
Seat height (mm): 825
Tank (L): 11.5
Tires
Front tire: 100/80-17
Rear tire: 140/70-17
Front pressure (bar): 1.8
Rear pressure (bar): 2
Drivetrain
Drive chain: 420 chain, 132 links
Sprockets (front / rear): 14 / 48
Ignition
Spark plug: NGK CR9E
Plug gap: 0.7-0.8 mm
Fluids & Filters
Engine oil: SAE10W-40, API SG
Engine oil (with filter, L): 1
Oil filter: Hiflofiltro HF152
Air filter: Hiflofiltro HFA4115
Coolant (L): 1.3
Brake fluid: DOT 4
Fuel consumption
Estimated range: ~383 km on a full tank (11.5 L)
Service
Battery: YTX7L-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 cold 0.10-0.14 mm, exhaust cold 0.20-0.24 mm. Engine oil: oil grade SAE10W-40, API SG, 1 L with filter change. Spark plug: NGK CR9E (gap 0.7-0.8 mm). Brake fluid: DOT 4. Coolant capacity: 1.3 L. Chain: 132 links, sprockets 14/48 teeth. Tire pressure: front 1.8 bar, rear 2 bar (cold). Tire size: front 100/80-17, rear 140/70-17. 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 SG, 1.0 L (with 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 HF152
- Premium Hiflofiltro HF152
- Premium K&N KN-152
Air filter
Spec: Hiflofiltro HFA4115
- Standard Hiflofiltro HFA4115
Spark plug
Spec: NGK CR9E, gap 0.7-0.8 mm
- OEM NGK CR9E
- Premium NGK CR9EIX
- Standard NGK CR9E
Front brake pads
Spec: OEM front pad (EBC equivalent: FA226HH)
- Premium EBC FA226HH
- Standard EBC FA226 (organic)
Rear brake pads
Spec: OEM rear pad (EBC equivalent: FA174HH)
- Premium EBC FA174HH
- Standard EBC FA174 (organic)
Drive chain
Spec: 132 links | Sprockets 14/48 teeth / 132 links
Front tire
Spec: 100/80-17, 1.8 bar
- OEM OEM 100/80-17
Rear tire
Spec: 140/70-17, 2.0 bar
- OEM OEM 140/70-17
Battery
Spec: OEM battery: Yuasa YTX7L-BS
- Premium Yuasa YTX7L-BS or YTX7A-BS (typical 125-250cc)
Brake fluid
Spec: DOT 4
- Standard TotalEnergies HBF4
Coolant
Spec: 1.30 L coolant capacity
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: cold 0.10-0.14 mm
- OEM Exhaust clearance: cold 0.20-0.24 mm
Suspension
Spec: 41 mm USD fork / RE:434 / LI:321 ml
- OEM Fork: 41 mm USD fork
- OEM Fork oil grade: RE:434 / LI:321 ml
