Kawasaki Z400 — OEM Fluid, Tire Pressure & Maintenance Specs
399cc Liquid-Cooled Parallel-Twin DOHC 8-Valve (Downdraft Intake · Assist & Slipper Clutch) · Source: Kawasaki Z400 (2019–2023) Official Owner’s Manual Maintenance Specifications
According to the Kawasaki Z400 (2019–2023) Official Owner’s Manual Maintenance Specifications, the 2019–2023 Kawasaki Z400 (chassis ER400D) requires 1.6 L (1.69 US qt) of SAE 10W-40 (JASO MA2, API SG/SJ/SL) engine oil for a drain-only change and 2 L (2.11 US qt) with filter service (16097-0008 / HF303). Standard solo cold tire pressure is 200 kPa / 2.00 bar / 29 PSI front (110/70 R17 M/C 54H) and 225 kPa / 2.25 bar / 33 PSI rear (150/60 R17 M/C 66H), paired with 2× NGK LMAR9G spark plug(s) and a YTX9-BS battery.
Drain only: 1.6 L (1.69 US qt)
R 225 kPa (2.25 bar)
Est. Range: ~364 km (226 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: 1.6 L (1.69 US qt) • With filter/strainer: 2 L (2.11 US qt) • Complete dry overhaul: 2.3 L (2.43 US qt) |
| OEM Oil Filter Code & Type | 16097-0008 / HF303 |
| 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 | 29 N·m (21.4 lb-ft / 2.96 kgf·m) — Use fresh crush washer |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 110/70 R17 M/C 54H · Rear: 150/60 R17 M/C 66H (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 LMAR9G × 2 (Gap: 0.8–0.9 mm) |
| OEM Battery Code & Rating | YTX9-BS (12V 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 for aluminum radiators (50:50 premix) |
3. Ergonomics, Range & Scheduled Service Intervals
| Displacement · Max Power · Peak Torque | 399 cc · 45 hp @ 10,000 rpm · 38 N·m (28.0 lb-ft) @ 8,000 rpm |
|---|---|
| Seat Height & Wet Curb Weight | 785 mm (30.9 in) · 167 kg (368 lbs) |
| Fuel Tank & Est. Real-World Range | 14 L (3.7 US gal) · ~26 km/L → ~364 km (226 mi) |
| OEM Scheduled Maintenance Intervals |
• First Break-In: 1,000 km • Engine Oil / Filter: 12,000 km / 12,000 km • Air Filter / Spark Plug: 18,000 km / 12,000 km • Valve Clearance Check: 24,000 km |
4. Generation Cutoffs & Real-World Wrenching Gotchas
Model-Year & Chassis Generation Notes
Introduced in 2019 as chassis ER400D alongside the Ninja 400 to replace the Z300, updated for Euro 5 in 2023, and succeeded by the 451cc Z500 in 2024.
Oil & Clutch Mechanical Engineering Note
Light assist-and-slipper clutch springs make the ER400D sensitive to friction modifiers; run strict JASO MA2 SAE 10W-40 oil (2.0 L with filter HF303) and keep 2–3 mm lever free play.
Garage Wrenching Gotchas
- Unlike the faired Ninja 400, the Z400 exposes its front spin-on filter 16097-0008 directly behind the chin spoiler for tool-free fairing-less oil changes.
- Zero clutch cable free play preloads the pull-rod bearing and glazes plates rapidly—always verify 2–3 mm of cold free play at the handlebar perch.
5. Frequently Asked Questions (FAQ)
What oil volume, JASO grade, and oil filter code does the Kawasaki Z400 (2019–2023) require?
Because its wet multi-plate clutch shares engine oil with the gearbox, run SAE 10W-40 (JASO MA2) at 1.6 L (1.69 US qt) drain-only and 2 L (2.11 US qt) with filter (16097-0008 / HF303).
How do you accurately check the oil level on the Z400, 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 29 N·m with a new crush washer. Factory oil change intervals are every 12,000 km, with valve clearance inspection every 24,000 km.
What are the cold tire pressures, puncture repair type, seat height, and range of the Z400?
Fitted with 110/70 R17 M/C 54H front and 150/60 R17 M/C 66H rear tubeless rims (compatible with roadside plug kits), set cold tire pressures to 29 / 33 PSI (200/225 kPa) solo or 29 / 33 PSI loaded. Seat height is 785 mm (30.9 in) at 167 kg wet weight, delivering ~364 km per 14 L tank.