Aprilia RX 125 4T (2025) — Specs
Identity
Manufacturer: Aprilia
Model: RX 125 4T
Category: Motorcycle
Type: Motorcycle
Years: 2025 →
Engine
Displacement (cc): 124
Cylinders: 1
Power (hp): 15
Power (kW): 11
Torque (Nm): 10
Dimensions
Overall length: 1990 mm
Overall width: 720 mm
Overall height: 1130 mm
Wheelbase: 1380 mm
Ground clearance: 175 mm
Weight (kg): 136
Seat height (mm): 880
Tank (L): 7
Drivetrain
Drive chain: 420 chain
Ignition
Spark plug: NGK MR9DI-7
Plug gap: 0.7 mm
Fluids & Filters
Engine oil: SAE5W-40
Oil filter: Hiflofiltro HF184
Air filter: Hiflofiltro HFA6107
Brake fluid: DOT 4
Fuel consumption
Estimated range: ~280 km on a full tank (7.0 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. Engine oil: oil grade SAE5W-40. Spark plug: NGK MR9DI-7. Chain: chain drive. 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: SAE 10W-50, 1.0 L (with filter)
- OEM OEM recommended engine oil (SAE 5W-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 HF184
- Premium Hiflofiltro HF184
- Premium K&N KN-184
Air filter
Spec: Hiflofiltro HFA6107
- Standard Hiflofiltro HFA6107
Spark plug
Spec: NGK CR8E, gap 0.6-0.7 mm
- OEM NGK CR8E
- Premium NGK CR8EIX
- Standard NGK CR8E
Front brake pads
Spec: OEM front pad (EBC equivalent: SFA193HH)
- Premium EBC SFA193HH
- Standard EBC SFA193 (organic)
Rear brake pads
Spec: OEM rear pad (EBC equivalent: SFA193HH)
- Premium EBC SFA193HH
- Standard EBC SFA193 (organic)
Drive chain
Spec: chain drive
Front tire
Rear tire
Battery
Spec: OEM battery: Yuasa YTX7L-BS
- Premium Yuasa YTX5L-BS or YT4B-BS (typical 50-125cc)
Brake fluid
- 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
Suspension
Spec: 41 mm USD fork
- OEM Fork: 41 mm USD fork
