Engine Size: 373

KTM 390 Duke   Powertrain & Performance Powered by a 399 cc LC4c single-cylinder liquid-cooled engine, delivering around 44 bhp (≈33 kW) and 39 Nm torque — up slightly from the earlier 373 cc model, while staying A2 licence‑compliant. Chassis & Handling Features a steel trellis main frame with a die-cast aluminium subframe and a curved aluminium swingarm, improving rigidity, … KTM KTM 390 DUKE