Honda PCX 125 (eSP+ JK05) — OEM Fluid, Tire Pressure & Maintenance Specs
125cc Liquid-Cooled Single-Cylinder SOHC 4-Valve eSP+ (Dry Centrifugal CVT) · Source: Honda PCX 125 (JK05 / WW125) Official Owner’s Manual Maintenance Schedule & Specifications
According to the Honda PCX 125 (JK05 / WW125) Official Owner’s Manual Maintenance Schedule & Specifications, the 2021–Present Honda PCX 125 (eSP+ JK05) (chassis JK05/WW125A) requires 0.8 L (0.85 US qt) of SAE 10W-30 (JASO MB, API SJ or higher) engine oil for a drain-only change and 0.85 L (0.90 US qt) with filter service (15421-K0R-V00 (Oil Strainer Screen)). Standard solo cold tire pressure is 200 kPa / 2.00 bar / 29 PSI front (110/70-14 M/C 50P) and 225 kPa / 2.25 bar / 33 PSI rear (130/70-13 M/C 63P), paired with 1× NGK LMAR8L-9 spark plug(s) and a GTZ8V / YTZ8V battery.
Drain only: 0.8 L (0.85 US qt)
R 225 kPa (2.25 bar)
Est. Range: ~365 km (227 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Dry Centrifugal CVT Belt Drive |
|---|---|
| Recommended Viscosity & Grade | SAE 10W-30 (Alt: SAE 10W-40 (고온/혹서기 허용)) · JASO MB · API SJ or higher |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 0.8 L (0.85 US qt) • With filter/strainer: 0.85 L (0.90 US qt) • Complete dry overhaul: 0.9 L (0.95 US qt) |
| OEM Oil Filter Code & Type | 15421-K0R-V00 (Oil Strainer Screen) |
| Correct Oil Level Check Method | Hold upright on level ground; rest dipstick UNTHREADED on filler neck (do NOT screw in) |
| Oil Drain Bolt Torque | 24 N·m (17.7 lb-ft / 2.45 kgf·m) — Use fresh crush washer |
| Final Drive / Gear Oil | 120 ml (0.12 L) — SAE 10W-30 JASO MB (120 ml drain / 140 ml disassembly) |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 110/70-14 M/C 50P · Rear: 130/70-13 M/C 63P (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 200 kPa / 2.00 bar / 29 PSI Rear: 225 kPa / 2.25 bar / 33 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 200 kPa / 2.00 bar / 29 PSI Rear: 250 kPa / 2.50 bar / 36 PSI |
| OEM Spark Plug & Quantity | NGK LMAR8L-9 × 1 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | GTZ8V / YTZ8V (12V 7.0Ah MF AGM) |
| Final Drive Maintenance | Honda OEM V-Belt (23100-K1Z-J11) — Replace every 24,000 km (15,000 mi) |
| Brake Fluid & Coolant | DOT 4 · Pro Honda HP Silicate-Free Ethylene Glycol Premix (~0.52 L) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 125 cc · 12.5 hp @ 8,750 rpm · 11.8 N·m (8.7 lb-ft) @ 6,500 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 764 mm (30.1 in) · 133 kg (293 lbs) |
| Fuel Tank & Est. Real-World Range | 8.1 L (2.1 US gal) · ~45 km/L → ~365 km (227 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 6,000 km / 12,000 km • Air Filter / Spark Plug: 18,000 km / 12,000 km • Valve Clearance Check: 6,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
From 2021 onward (chassis JK05), the PCX 125 switched to the 4-valve eSP+ engine and a wider 13-inch rear wheel (130/70-13). Earlier 2018–2020 JF81 2-valve models use an NGK CPR7EA-9 plug and 14-inch rear tire.
Oil & Clutch Mechanical Engineering Note
Because the PCX 125 uses a dry centrifugal clutch isolated from the crankcase, Honda specifies low-friction SAE 10W-30 JASO MB oil for optimal fuel economy. It has no replaceable paper oil filter—only a cleanable mesh screen—so pouring a full 1.0 L bottle overfills the 0.80 L sump.
Garage Wrenching Gotchas
- Always check engine oil on the centerstand with the dipstick resting on the threads—never screw it in to read the level.
- Never use an impact gun on the 17mm aluminum oil strainer cap; fine crankcase threads strip easily above 20 N·m.
5. Frequently Asked Questions (FAQ)
How much engine oil does a Honda PCX 125 (JK05) take on a standard oil change?
A standard drain-and-fill on the Honda PCX 125 (JK05) requires 0.80 L (0.85 US qt), or 0.85 L when cleaning the mesh strainer screen. Pouring a full 1-liter bottle causes crankcase blow-by into the airbox.
What oil and final drive gear oil intervals are safest for urban stop-and-go PCX 125 riding?
While Honda lists 6,000 km under ideal commuting, severe stop-and-go city riders typically refresh the 0.80 L oil bath every 2,500–3,000 km and drain the 120 ml final reduction gear oil every 6,000–8,000 km.
What is the recommended cold tire pressure in PSI for the Honda PCX 125?
Cold inflation pressure for the Honda PCX 125 is 200 kPa (29 PSI) front and 225 kPa (33 PSI) rear for solo riding, increasing to 250 kPa (36 PSI) rear when carrying a passenger or heavy top-box cargo.