Kawasaki Z125 (BX125B Euro) — OEM Fluid, Tire Pressure & Maintenance Specs
125cc Liquid-Cooled Single DOHC 4-Valve (17-Inch Full-Size A1 Naked) · Source: Kawasaki Z125 (BX125B Euro) (2019–Present) Official Owner’s Manual Maintenance Specifications
According to the Kawasaki Z125 (BX125B Euro) (2019–Present) Official Owner’s Manual Maintenance Specifications, the 2019–Present Kawasaki Z125 (BX125B Euro) (chassis BX125B) requires 1 L (1.06 US qt) of SAE 10W-40 (JASO MA2, API SG/SJ/SL) engine oil for a drain-only change and 1.1 L (1.16 US qt) with filter service (52010-1053 / HF112). Standard solo cold tire pressure is 200 kPa / 2.00 bar / 29 PSI front (100/80-17 M/C 52S) and 225 kPa / 2.25 bar / 33 PSI rear (130/70-17 M/C 62S), paired with 1× NGK CR8E / DPR8EA-9 spark plug(s) and a YTX7L-BS / YTX9-BS battery.
Drain only: 1 L (1.06 US qt)
R 225 kPa (2.25 bar)
Est. Range: ~413 km (257 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: 1 L (1.06 US qt) • With filter/strainer: 1.1 L (1.16 US qt) • Complete dry overhaul: 1.3 L (1.37 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: 100/80-17 M/C 52S · Rear: 130/70-17 M/C 62S (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: 225 kPa / 2.25 bar / 33 PSI |
| OEM Spark Plug & Quantity | NGK CR8E / DPR8EA-9 × 1 (Gap: 0.7–0.9 mm) |
| OEM Battery Code & Rating | YTX7L-BS / YTX9-BS (12V 6.0–8.0Ah MF AGM) |
| Final Drive Maintenance | 520 Sealed O/X-Ring Chain — Maintain 25–35 mm slack and lube every 800–1,000 km |
| Brake Fluid & Coolant | DOT 4 · Silicate-free ethylene-glycol OAT coolant (50:50 premix) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 125 cc · 15 hp @ 10,000 rpm · 11.7 N·m (8.6 lb-ft) @ 7,700 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 815 mm (32.1 in) · 146 kg (322 lbs) |
| Fuel Tank & Est. Real-World Range | 11 L (2.9 US gal) · ~37.5 km/L → ~413 km (257 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
Completely distinct from the 12-inch air-cooled Z125 Pro minimoto, running a liquid-cooled 6-speed DOHC single in a 17-inch trellis chassis.
Oil & Clutch Mechanical Engineering Note
Kawasaki single-cylinder retro & dual-sport family (Z125, W230, KLX230/250/300, KLR650) running internal paper element HF112 and SAE 10W-40 JASO MA2.