Aprilia RX 125 (4T Enduro) — OEM Fluid, Tire Pressure & Maintenance Specs
124.2cc Liquid-Cooled 4-Stroke Single DOHC 4-Valve Dual-Sport · Source: Aprilia RX 125 (4T Enduro) (2018–Present) Official Owner’s Manual Maintenance Specifications
According to the Aprilia RX 125 (4T Enduro) (2018–Present) Official Owner’s Manual Maintenance Specifications, the 2018–Present Aprilia RX 125 (4T Enduro) (chassis ZD4KXB00) requires 1 L (1.06 US qt) of SAE 5W-40 (JASO MA2, API SN Full Synthetic 10W-50) engine oil for a drain-only change and 1.15 L (1.22 US qt) with filter service (Piaggio 82658R / HF563). Standard solo cold tire pressure is 170 kPa / 1.70 bar / 25 PSI front (90/90-21 54R) and 190 kPa / 1.90 bar / 28 PSI rear (120/80-18 62R), paired with 1× NGK MR8BI-8 spark plug(s) and a YTX7L-BS battery.
Drain only: 1 L (1.06 US qt)
R 190 kPa (1.90 bar)
Est. Range: ~266 km (165 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Wet Multi-Plate Manual Clutch NEVER use JASO MB |
|---|---|
| Recommended Viscosity & Grade | SAE 5W-40 (Alt: SAE 5W-40 (V4)) · JASO MA2 · API SN Full Synthetic 10W-50 |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 1 L (1.06 US qt) • With filter/strainer: 1.15 L (1.22 US qt) • Complete dry overhaul: 1.3 L (1.37 US qt) |
| OEM Oil Filter Code & Type | Piaggio 82658R / HF563 |
| Correct Oil Level Check Method | Upright on level ground; screw dipstick ALL THE WAY IN, then remove to read level |
| Oil Drain Bolt Torque | 25 N·m (18.4 lb-ft / 2.55 kgf·m) — Use fresh crush washer |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 90/90-21 54R · Rear: 120/80-18 62R (Tube-Type Spoke Rim) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 170 kPa / 1.70 bar / 25 PSI Rear: 190 kPa / 1.90 bar / 28 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 180 kPa / 1.80 bar / 26 PSI Rear: 210 kPa / 2.10 bar / 30 PSI |
| OEM Spark Plug & Quantity | NGK MR8BI-8 × 1 (Gap: 0.7–0.8 mm) |
| OEM Battery Code & Rating | YTX7L-BS (12V 6.0Ah MF AGM) |
| Final Drive Maintenance | 520 Sealed X-Ring Chain — Maintain 25–35 mm slack and clean/lubricate regularly |
| Brake Fluid & Coolant | DOT 4 · OAT ethylene-glycol coolant for aluminum radiators (50:50 premix) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 124 cc · 15 hp @ 10,000 rpm · 11.2 N·m (8.3 lb-ft) @ 8,000 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 905 mm (35.6 in) · 134 kg (295 lbs) |
| Fuel Tank & Est. Real-World Range | 7 L (1.8 US gal) · ~38 km/L → ~266 km (165 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 6,000 km / 6,000 km • Air Filter / Spark Plug: 20,000 km / 20,000 km • Valve Clearance Check: 12,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Trail-ready sibling to the SX 125 running full-size 21-inch front and 18-inch rear knobby spoke wheels with 905 mm seat height.
Oil & Clutch Mechanical Engineering Note
Slow technical trails limit radiator airflow—use full-synthetic SAE 5W-40 JASO MA2 (1.15 L w/ filter HF563) and clean the airbox element after dusty rides.