Interesting Facts About the KTM 390 Duke
The KTM 390 Duke debuted with a 373 cc single‑cylinder, liquid‑cooled engine that delivered 43 hp. Over more than a decade it has been refreshed through three generations, and the 2026 model now boasts a larger 399 cc LC4c engine with smoother acceleration and reduced weight.
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First‑generation powerplant
When the 390 Duke first arrived, it featured KTM’s 373 cc single‑cylinder, liquid‑cooled engine, producing 43 horsepower and 25.8 lb‑ft of torque.
Three generations of evolution
KTM has continuously updated the Duke over a decade, moving it into its third generation. Riders note that models from 2015‑2017 offer the most raw grunt, while bikes after mid‑2017 are refined for smoother performance.
2026 model – a bigger, lighter rocket
The 2026 KTM 390 Duke introduces the latest LC4c engine family, increasing displacement to 399 cc. This upgrade brings more power, smoother acceleration, and a lighter overall chassis.
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KTM 390 Duke Parts
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