Kawasaki Ninja 400 / Z400 (EX400G) — OEM Fluid, Tire Pressure & Maintenance Specs
399cc Liquid-Cooled Parallel-Twin DOHC 8-Valve 180° Crank (Assist & Slipper Wet Clutch) · Source: Kawasaki Ninja 400 (EX400G) Official Owner’s Manual Maintenance Specifications
According to the Kawasaki Ninja 400 (EX400G) Official Owner’s Manual Maintenance Specifications, the 2018–2024 Kawasaki Ninja 400 / Z400 (EX400G) (chassis EX400G/EX400H/ER400D) requires 1.6 L (1.69 US qt) of SAE 10W-40 (JASO MA2, API SG/SH/SJ/SL/SM) 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 (110/70R17 M/C 54H) and 225 kPa / 2.25 bar / 33 PSI rear (150/60R17 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: ~357 km (222 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 (서킷 고회전 주행 시)) · JASO MA2 · API SG/SH/SJ/SL/SM |
| 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 | 30 N·m (22.1 lb-ft / 3.06 kgf·m) — Use fresh crush washer |
2. Cold Tire Pressures, Wheels, Ignition & Drivetrain
| Front / Rear OEM Tire Sizes | Front: 110/70R17 M/C 54H · Rear: 150/60R17 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: 250 kPa / 2.50 bar / 36 PSI |
| OEM Spark Plug & Quantity | NGK LMAR9G × 2 (Gap: 0.7–0.8 mm) |
| OEM Battery Code & Rating | YTX9-BS (12V 8.0Ah MF AGM) |
| Final Drive Maintenance | 520 Sealed O-Ring Chain (106 links, 14T/41T) — Maintain 20–30 mm slack |
| Brake Fluid & Coolant | DOT 4 · Kawasaki Aluma-Cool Ethylene Glycol Coolant (~1.3 L) |
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) · 168 kg (370 lbs) |
| Fuel Tank & Est. Real-World Range | 14 L (3.7 US gal) · ~25.5 km/L → ~357 km (222 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
Debuting in 2018 with a clean-sheet trellis chassis 6 kg lighter than the old Ninja 300, the 399cc EX400G Ninja 400 (and naked Z400) ran through 2023 Euro 5 updates before evolving into the 451cc Ninja 500 in 2024.
Oil & Clutch Mechanical Engineering Note
Because early 2018–2019 EX400G clutches used very soft springs and a short pull-rod geometry prone to high-rpm slip when abused, crisp JASO MA2 SAE 10W-40 synthetic oil (2.0 L with HF303 filter) and proper lever free play are essential.
Garage Wrenching Gotchas
- If a 2018–2019 Ninja 400 slips under hard 5th/6th-gear roll-ons, verify 2–3 mm of clutch cable free play immediately and upgrade to Kawasaki’s revised 2020+ pull-rod/bearing or stiffer clutch springs.
- You can spin off the front-mounted 16097-0008 / HF303 oil filter using a cap-style socket wrench without stripping the main side fairings—just shield the header pipes from drips.
5. Frequently Asked Questions (FAQ)
How much oil does a Kawasaki Ninja 400 take with and without filter?
Drain-only capacity is 1.6 L (1.7 US qt), and oil with a new 16097-0008 / HF303 filter takes exactly 2.0 L (2.1 US qt)—two 1-liter bottles fill it cleanly.
What is the recommended cold tire pressure for the Kawasaki Ninja 400?
Cold street tire pressure is 200 kPa (29 PSI) front and 225 kPa (33 PSI) rear solo, or 250 kPa (36 PSI) rear with a passenger.
Why do both new riders and track-day racers love the Ninja 400?
Raised clip-ons above the triple clamp, a 785 mm seat, and a 168 kg wet weight make street commuting effortless while delivering razor-sharp corner speed on track.