The new 250 twins use the same engine base as the 200 and 390 models. The new 250cc motor will further balance out KTM’s product placement, giving them a proper quarter-litre competitor, positioned between the 125 and 390 in global markets.
The new 248.8cc single cylinder, DOHC four-valve, FI motor runs a 72mm bore and a 61.1mm stroke (against the 89mm x 60mm of the 390). It makes 31.3 PS at 9,000 RPM with a peak 24 Nm coming in at 7,250 RPM. The exhaust valves are a larger 29mm, with 24mm exhaust valves being employed. The motor weighs just 37.2 kg and thus, the dry weight of the 250 Duke stands at just 139 kg; lending it a power-to-weight ratio of 225 PS/tonne!