Kawasaki Z125 Pro — OEM Fluid, Tire Pressure & Maintenance Specs
125cc Air-Cooled Single-Cylinder SOHC 2-Valve (4-Speed Manual · Inverted Fork) · Source: Kawasaki Z125 Pro (2016–Present) Official Owner’s Manual Maintenance Specifications
According to the Kawasaki Z125 Pro (2016–Present) Official Owner’s Manual Maintenance Specifications, the 2016–Present Kawasaki Z125 Pro (chassis BR125H/BR125J) requires 0.85 L (0.90 US qt) of SAE 10W-40 (JASO MA2, API SG/SJ/SL) engine oil for a drain-only change and 0.95 L (1.00 US qt) with filter service (52010-1053 / HF112). Standard solo cold tire pressure is 150 kPa / 1.50 bar / 22 PSI front (100/90-12 49J) and 175 kPa / 1.75 bar / 25 PSI rear (120/70-12 51L), paired with 1× NGK CR6HSA spark plug(s) and a YTZ4V / YTX4L-BS battery.
Drain only: 0.85 L (0.90 US qt)
R 175 kPa (1.75 bar)
Est. Range: ~333 km (207 mi)
1. Engine Lubrication, Filter & Clutch Specifications
| Clutch Architecture | Wet Multi-Plate Manual Clutch NEVER use JASO MB |
|---|---|
| Recommended Viscosity & Grade | SAE 10W-40 (Alt: SAE 10W-50) · JASO MA2 · API SG/SJ/SL |
| Oil Volume (Drain / With Filter / Overhaul) |
• Drain only: 0.85 L (0.90 US qt) • With filter/strainer: 0.95 L (1.00 US qt) • Complete dry overhaul: 1.05 L (1.11 US qt) |
| OEM Oil Filter Code & Type | 52010-1053 / HF112 |
| Correct Oil Level Check Method | Hold bike upright on level ground 3–5 min after warm shutdown; read crankcase sight glass |
| Oil Drain Bolt Torque | 20 N·m (14.8 lb-ft / 2.04 kgf·m) — Use fresh crush washer |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 100/90-12 49J · Rear: 120/70-12 51L (Tubeless) |
|---|---|
| Cold Tire Pressure — Solo Riding |
Front: 150 kPa / 1.50 bar / 22 PSI Rear: 175 kPa / 1.75 bar / 25 PSI |
| Cold Tire Pressure — 2-Up / Loaded Touring |
Front: 150 kPa / 1.50 bar / 22 PSI Rear: 200 kPa / 2.00 bar / 29 PSI |
| OEM Spark Plug & Quantity | NGK CR6HSA × 1 (Gap: 0.7–0.9 mm) |
| OEM Battery Code & Rating | YTZ4V / YTX4L-BS (12V 3.0Ah MF AGM) |
| Final Drive Maintenance | 420 Drive Chain (14T/30T) — Maintain 25–35 mm slack |
| Brake Fluid & Coolant | DOT 4 · Air/Oil-Cooled Engine (No liquid coolant) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 125 cc · 9.5 hp @ 8,000 rpm · 9.5 N·m (7.0 lb-ft) @ 6,000 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 780 mm (30.7 in) · 102 kg (225 lbs) |
| Fuel Tank & Est. Real-World Range | 7.4 L (2.0 US gal) · ~45 km/L → ~333 km (207 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 6,000 km / 12,000 km • Air Filter / Spark Plug: 12,000 km / 12,000 km • Valve Clearance Check: 12,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Distinct from Europe’s liquid-cooled 17-inch Z125 (BX125), the 12-inch air-cooled BR125 minimoto came in semi-auto (Z125) and 4-speed manual-clutch (Z125 Pro) versions.
Oil & Clutch Mechanical Engineering Note
Unlike early Groms, the Z125 Pro includes a replaceable Cartridge paper element (52010-1053 / HF112) on the right case; with just 0.95 L total capacity, monitor JASO MA2 oil closely.
Garage Wrenching Gotchas
- Ensure the small coil spring sits behind the HF112 filter cap and face the rubber grommet inward—reversing the element starves the SOHC top end of oil pressure.
- Factory cold tire pressures are only 22 PSI front and 25 PSI rear on 12-inch rims; inflating to full-size sportbike pressures (36–42 PSI) ruins grip.
5. Frequently Asked Questions (FAQ)
What oil volume, JASO grade, and oil filter code does the Kawasaki Z125 Pro (2016–Present) require?
Because its wet multi-plate clutch shares engine oil with the gearbox, run SAE 10W-40 (JASO MA2) at 0.85 L (0.90 US qt) drain-only and 0.95 L (1.00 US qt) with filter (52010-1053 / HF112).
How do you accurately check the oil level on the Z125 Pro, and what are its service intervals?
Hold the motorcycle dead-vertical on level ground 2–3 minutes after warm shutdown and verify the oil sits mid-way between the Upper and Lower marks in the crankcase sight glass—never on the sidestand. Torque the drain plug to 20 N·m with a new crush washer. Factory oil change intervals are every 6,000 km, with valve clearance inspection every 12,000 km.
What are the cold tire pressures, puncture repair type, seat height, and range of the Z125 Pro?
Fitted with 100/90-12 49J front and 120/70-12 51L rear tubeless rims (compatible with roadside plug kits), set cold tire pressures to 22 / 25 PSI (150/175 kPa) solo or 22 / 29 PSI loaded. Seat height is 780 mm (30.7 in) at 102 kg wet weight, delivering ~333 km per 7.4 L tank.