KTM 790 Duke service intervals and costs
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 to buy for the 790 Duke's next service
Each card carries the manual's grade or size straight into an Amazon search. Match the listing to the spec yourself; the search is a head start, not a verified pick.
- Find at Amazon
Engine oil
10W-50 full synthetic JASO MA2 engine oil
The manual's grade is 10W-50 full synthetic JASO MA2. Match every part of it on the label, viscosity and rating both, and the brand becomes a matter of taste.
2.8 L per change with a filter
- Find at Amazon
Oil filter
Oil filter for the KTM 790 Duke
Filters are keyed to the engine, not the badge. Check the listing's fitment names the 790 Duke and its model year before buying; the part number in the manual settles any doubt.
- Find at Amazon
Drive chain
520 pitch drive chain
Pitch is fixed at 520; link count is not. Count the links on the chain coming off, or read the manual, before ordering. An X-ring chain costs more and outlasts a plain one.
- Find at Amazon
Front tyre
120/70-17 front tyre
Size is exact and not up for debate. Speed and load ratings must meet or exceed the manual's; compound and tread pattern are where taste comes in.
- Find at Amazon
Rear tyre
180/55-17 rear tyre
Same rule as the front: size exactly as listed, ratings at or above the manual's. Buying front and rear as a matched pair keeps the handling the factory set up.
As an Amazon Associate, The Moto Ref earns from qualifying purchases. Prices and availability live on the retailer's page; recommendations follow the spec sheet, not the commission.
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.