KTM 390 Duke 2025 Maintenance Schedule
The 2025 KTM 390 Duke maintenance schedule below covers the manufacturer's recommended service intervals for general maintenance, brake fluid, oil, tires, drive chain maintenance, valve clearance, air filter and coolant. Intervals are shown in kilometres by default and can be switched to miles.
399ccEngine size
40Maintenance items
Official manufacturer manual
Sourced from KTM Official Manuals (this document covers model years 2024–2025): azwecdnepstoragewebsiteuploads.azureedge.net
Full schedule
| Task | Interval | Difficulty | Notes |
|---|---|---|---|
| Read out the fault memory using the KTM diagnostics tool. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Read fault memory with KTM diagnostics tool. |
| Program the shift shaft sensor. | Every 10,000 km (first at 1,000 km) | Easy | Program/calibrate the gearshift shaft sensor. |
| Check that the electrical system is functioning properly. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Check electrical system function. |
| Check that the brake linings of the front brake are secured. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Check front brake pad security/wear. |
| Check that the brake linings of the rear brake are secured. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Check rear brake pad security/wear. |
| Check the brake discs. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Check brake discs for wear/damage. |
| Check the brake lines for damage and tightness. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Check brake lines for damage and tightness. |
| Check the front brake fluid level. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Check front brake fluid level. |
| Change the front brake fluid. | Every 24 months · Replace every 24 months | Moderate | Replace front brake fluid. |
| Check the rear brake fluid level. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Check rear brake fluid level. |
| Change the rear brake fluid. | Every 24 months · Replace every 24 months | Moderate | Replace rear brake fluid. |
| Change the engine oil and the oil filter, clean the oil screens. | Every 10,000 km (first at 1,000 km) · Every 12 months | Moderate | Change engine oil and oil filter, clean oil screens. |
| Check all hoses (fuel, cooling, bleeder, drainage hoses, etc.) and sleeves for cracking, tightness, and correct routing. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Check all hoses/sleeves for cracking/tightness/routing. |
| Empty the drainage hoses. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Drain frame/engine drainage hoses. |
| Check the cables for damage and that there are no kinks in the routing. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Check general cables for damage/kinks. |
| Check the frame. | Every 20,000 km | Moderate | Structural check of the frame. |
| Check the link fork. | Every 20,000 km | Moderate | Structural check of the link fork. |
| Checking the fork bearing for play. | Every 10,000 km | Moderate | Check fork bearing for play. |
| Checking the steering head bearing for play. | Every 10,000 km (first at 1,000 km) | Advanced | Check steering head bearing play. |
| Check the wheel bearing for play. | Every 10,000 km | Moderate | Check front/rear wheel bearing for play. |
| Check the shock absorber and fork for leaks. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Check shock absorber and fork for oil leaks. |
| Check the tire condition. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Check tire tread condition. |
| Check tire pressure. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Check tire pressures. |
| Check the chain, rear sprocket, and engine sprocket. | Every 10,000 km · Every 12 months | Easy | Check chain, rear sprocket, and engine sprocket wear. |
| Check the chain tension. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Check drive chain tension. |
| Grease all moving parts (side stand, hand lever, chain, etc.) and check for smooth operation. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Grease moving parts, check smooth operation. |
| Check that the throttle cables are undamaged, routed without kinks, and set correctly. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Check throttle cables. |
| Check the valve clearance, change the spark plug. | Every 20,000 km | Moderate | Valve clearance check and spark plug replacement. |
| Change the air filter, clean the air filter box. | Every 10,000 km | Easy | Replace air filter element, clean air filter box. |
| Check the headlight setting. | Every 10,000 km (first at 1,000 km) | Easy | Check headlight aim. |
| Check the tightness of the safety-relevant screws and nuts which are easily accessible. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Check safety-relevant screws/nuts for tightness. |
| Clean the dust boots of the fork legs. | Every 10,000 km | Easy | Clean fork leg dust boots. |
| Check that the radiator fan is functioning properly. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Check radiator fan operation. |
| Check the coolant level. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Check coolant reservoir level. |
| Checking the antifreeze. | Every 10,000 km · Every 24 months | Easy | Check antifreeze concentration. |
| Change the coolant. | Every 48 months · Replace every 48 months | Moderate | Replace engine coolant. |
| Final check: Check the vehicle is roadworthy and take a test ride. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Roadworthiness check and test ride. |
| Read out the fault memory after the test ride using the KTM diagnostics tool. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Read fault memory after test ride. |
| Set the service interval display. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Reset service interval indicator. |
| Enter electronic proof of service. | Every 10,000 km (first at 1,000 km) · Every 12 months | Easy | Log electronic proof of service. |
No maintenance items match your search.
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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