Kawasaki Ninja 400 2025 Maintenance Schedule
The 2025 Kawasaki Ninja 400 maintenance schedule below covers the manufacturer's recommended service intervals for coolant, general maintenance, drive chain maintenance, spark plugs, tires, air filter, valve clearance, oil and brake fluid. Intervals are shown in kilometres by default and can be switched to miles.
399ccEngine size
38Maintenance items
Official manufacturer manual
Sourced from Kawasaki Motors Official Owner Center (Service Manual) (this document covers model years 2021–2025): kawasaki.com
Full schedule
| Task | Interval | Difficulty | Notes |
|---|---|---|---|
| Cooling system inspection | Every 12,000 km (first at 1,000 km) · Every 12 months | Easy | Inspect cooling system for leaks and correct operation. |
| Coolant replacement | Every 36,000 km · Every 36 months | Moderate | Replace coolant, water hose, and O-ring. |
| Air suction system inspection | Every 12,000 km | Moderate | Inspect air suction (secondary air) system. |
| Drive chain guide wear inspection | Every 12,000 km | Easy | Inspect drive chain guide for wear. |
| Bolts, nuts, and fasteners inspection | Every 12,000 km (first at 1,000 km) | Easy | Inspect condition of bolts, nuts, and fasteners. |
| Spark plug replacement | Every 12,000 km | Moderate | Replace spark plugs. |
| Tire air pressure inspection | Every 12,000 km · Every 12 months | Easy | Inspect and adjust tire air pressure. |
| Wheel and tire inspection | Every 12,000 km · Every 12 months | Easy | Inspect wheels and tires for damage and wear. |
| Wheel bearing damage inspection | Every 12,000 km · Every 12 months | Moderate | Inspect wheel bearings for damage. |
| Drive chain lubrication condition inspection | Every 600 km | Easy | Inspect and lubricate drive chain condition. |
| Drive chain slack inspection | Every 1,000 km | Easy | Inspect and adjust drive chain slack. |
| Brake pad wear inspection | Every 12,000 km · Every 12 months | Easy | Inspect brake pads for wear. |
| Brake light switch operation inspection | Every 12,000 km (first at 1,000 km) · Every 12 months | Easy | Inspect brake light switch operation. |
| Suspension system inspection | Every 12,000 km · Every 12 months | Moderate | Inspect front fork and rear shock absorber operation. |
| Rear suspension lubrication | Every 24,000 km | Moderate | Lubricate rear suspension linkage. |
| Steering play inspection | Every 12,000 km · Every 12 months | Easy | Inspect steering play. |
| Air cleaner element replacement | Every 12,000 km | Easy | Replace air cleaner element. |
| Idle speed inspection | Every 12,000 km (first at 1,000 km) | Moderate | Inspect and adjust idle speed. |
| Throttle control system inspection | Every 12,000 km (first at 1,000 km) · Every 12 months | Easy | Inspect throttle control system play, smooth return, no drag. |
| Engine vacuum synchronization | Every 12,000 km | Advanced | Synchronize throttle body vacuum readings across cylinders. |
| Fuel system inspection | Every 12,000 km (first at 1,000 km) · Every 12 months | Moderate | Inspect fuel system for leaks and proper operation. |
| Fuel filter replacement | Every 24,000 km | Moderate | Replace in-tank fuel filter. |
| Fuel hose replacement | Every 60 months | Moderate | Replace fuel hose. |
| Evaporative emission control system inspection | Every 24,000 km | Moderate | Inspect evaporative emission control system. |
| Coolant level inspection | Every 12,000 km (first at 1,000 km) · Every 12 months | Easy | Inspect coolant level. |
| Valve clearance inspection | Every 24,000 km | Advanced | Inspect and adjust valve clearances. |
| Clutch operation inspection | Every 12,000 km (first at 1,000 km) · Every 12 months | Easy | Inspect clutch play, engagement, and disengagement. |
| Engine oil & filter change | Every 12,000 km (first at 1,000 km) · Every 12 months | Easy | Replace engine oil and engine oil filter. |
| Drive chain wear inspection | Every 12,000 km | Easy | Inspect drive chain for wear. |
| Brake system inspection | Every 12,000 km (first at 1,000 km) · Every 12 months | Easy | Inspect overall brake system condition. |
| Brake operation inspection | Every 12,000 km (first at 1,000 km) · Every 12 months | Easy | Inspect brake effectiveness, play, and drag. |
| Brake fluid level inspection | Every 12,000 km (first at 1,000 km) · Every 12 months | Easy | Inspect brake fluid level, front and rear. |
| Brake fluid replacement | Every 24,000 km · Every 24 months | Moderate | Replace brake fluid, front and rear. |
| Brake hose replacement | Every 48 months | Moderate | Replace brake hose. |
| Brake master cylinder & caliper rubber parts replacement | Every 48,000 km · Every 48 months | Moderate | Replace rubber parts of brake master cylinder and caliper. |
| Steering stem bearing lubrication | Every 24,000 km · Every 24 months | Moderate | Lubricate steering stem bearing. |
| Electrical system inspection | Every 12,000 km · Every 12 months | Easy | Inspect electrical system. |
| Chassis parts lubrication | Every 12,000 km · Every 12 months | Easy | Lubricate chassis parts (pivots, levers, stands). |
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Easy: basic tools, straightforward Easy–Moderate: varies by task — somewhere between the two Moderate: some mechanical know-how helps Advanced: specialized tools/skill, still DIY-doable Expert: significant experience required Professional: dealer or shop recommended
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