KTM 790 Duke maintenance and service intervals
The full service schedule for the 2025 790 Duke: oil change interval, valve checks, first service and realistic costs, built from its published service data and the assumptions shown further down. A compiled guide like this supplements the owner's manual; it never replaces it.
- 15,000 km
- oil service
- 30,000 km
- valve check
- 2 years
- warranty
- €1,560
- est. per 10,000 km
What is due next on yours?
Service intervals
One row per oil-service milestone. Bold rows are the bigger visits.
| Odometer | Work due |
|---|---|
| 15,000 km |
|
| 30,000 km |
|
| 45,000 km |
|
| 60,000 km |
|
First service at 1,000 km
The first service matters more than any visit after it: it drains the oil that carried the metal particles of engine break-in. Booked at a dealer it runs about €160, and skipping or stretching it is the cheapest way to buy an expensive problem. Here is what the workshop does:
- Engine oil and filter change
- Chain tension, wear and lubrication
- Brake pads, discs and fluid level check
- Fastener torque check and electronic diagnostic read-out
By calendar, not odometer
| Engine oil and filter | every 12 months if the distance interval is not reached |
|---|---|
| Brake fluid | every 2 years |
| Coolant | every 3 years |
| Fork oil | every 40,000 km |
| Battery | load test yearly; typical life 4 to 5 years |
What each service costs
Dealer estimates from the labour and parts assumptions below. DIY removes the labour line entirely.
| First service1,000 kmBreak-in oil and filter change plus the full checklist; flushes out running-in metal | ~€160 |
|---|---|
| Routine serviceevery 15,000 km or 12 monthsOil and filter, ~2.8 L, chain and brake checks, 1 h labour | ~€160 |
| Valve check serviceevery 30,000 kmRoutine service plus 3 h of valve work and new spark plugs | ~€470 |
What it costs per 10,000 km
| Fuel4.5 L/100 km at 1.85 EUR/L | €835 |
|---|---|
| Oil servicesevery 15,000 km, ~2.8 L oil plus filter and 1 h labour | €105 |
| Valve checksevery 30,000 km, ~3 h labour plus plugs | €105 |
| Chain and sprocketskit roughly every 24,000 km | €115 |
| Tyresnaked rubber, ~8,000 km a set | €400 |
| Total, estimated | €1,560 |
Assumptions: workshop labour €95/hour, fuel 1.85 EUR/L, oil €18/L, chain kit €180 fitted, naked tyres €320 a set lasting about 8,000 km. Oil quantity is the manual figure. DIY servicing removes the labour lines entirely. Your prices will differ; the ratios mostly will not.
Oil, plugs, chain and tyres
The consumables card: what the 790 Duke takes, for the parts counter or the shopping basket.
| Engine oil capacity | 2.8 L with filter change |
|---|---|
| Oil specification | 10W-50 full synthetic, JASO MA2 |
| Oil change interval | every 15,000 km or 12 months |
| Spark plug replacement | every 30,000 km |
| Valve actuation | Shim under bucket |
| Drive chain | 520 pitch |
| Tyre sizes | 120/70-17 front, 180/55-17 rear |
What 790 Duke owners actually watch
- The LC8c twin's 15,000 km services make it one of the cheaper KTMs to run per km.
- Early LC8c engines (2018 to 2020) had camshaft wear stories; the current CFMOTO-built engine has a clean record, but oil analysis at services buys peace of mind.
- Chain guides wear faster than the chain itself; look at them when you adjust.
Frequently asked
- When is the first service on the KTM 790 Duke?
- At 1,000 km. It is mostly an oil and filter change plus a full checklist, and it matters more than any later visit: it flushes out the metal particles from engine break-in. Expect around €160 at a dealer.
- How often does the KTM 790 Duke need an oil change?
- Every 15,000 km or 12 months, whichever comes first. Expect roughly €155 at a dealer, or the price of oil and a filter if you do it yourself.
- What is the valve check interval on the KTM 790 Duke?
- Every 30,000 km. Budget around 3 hours of workshop labour plus spark plugs when it comes due.
- Is the KTM 790 Duke cheap to maintain?
- Yes, for its class. Scheduled servicing works out near €210 per 10,000 km on our model, below the naked average of €235.
- What does the KTM 790 Duke cost to run per 10,000 km?
- Roughly €1,560 including fuel, scheduled servicing, chain and tyres, using the assumptions published on this page. Ride harder or softer and the tyre line moves first.
- What is the oil capacity of the KTM 790 Duke?
- 2.8 litres with a filter change, using 10W-50 full synthetic, JASO MA2. Check the level on the stand after a warm-up; overfilling costs more engines than underfilling.