Known problems by model

Ktm 390 Duke (2015–2017): what actually fails

The documented failure patterns on used Ktm 390 Dukes — the mileage window where each shows up, and what the repair typically costs at an independent shop. This is the same data NoLemon's Brief checks against every VIN.

2015–2017 TYPICAL 5k–40k MI $200–$450

Water pump seal leak and coolant loss

Water-pump seals weep and the little single loses coolant; NHTSA complaints report overheating on the highway and coolant disappearing every hundred miles, echoing wide forum consensus. Look for crusty residue at the weep hole low on the engine's right side, check the reservoir level, and pull the dipstick for any milky tint. Seals are a cheap fix caught early; a cooked engine is not.

BEFORE YOU BUY
Ask for repair records covering this item. If it hasn't been addressed and the car is in or near the mileage window, price the $200–$450 repair into your offer — or make it the seller's problem.

Buying a used 390 Duke?

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Ktm 390 Duke (2015–2017): what actually fails

Water pump seal leak and coolant loss

Buying a used 390 Duke?

More known problems by model