The KTM 250 Duke is powered by a 249.07cc, single-cylinder, liquid-cooled, EFI engine, delivering a maximum power of 31PS and a peak torque of 25Nm. The KTM 250 Duke is powered by a 249.07cc, single-cylinder, liquid-cooled, EFI engine, delivering a maximum power of 31PS and a peak torque of 25Nm. Zee News :Business