One such engine is the GM 2.5-liter "Iron Duke." Even hearing that name is liable to make hardcore General Motors fans break out in a cold sweat and competing acolytes of both Ford and Chrysler ...

One look at the 1390 Super Duke R, and you’ll know it’s a fair ... Complementing the new fascia is the updated bodywork. The tank panels are more muscular than ever and integrate into ...

390 Duke gets all-new frame, engine, suspension ... where the other two get a colour-matched plastic piece. Also, the tank extensions are different on the 390 to the other two and are longer ...

The signature orange colour is only seen on the tank extensions ... The new 250 Duke Ebony Black continues to be powered by a 248cc, liquid-cooled, single-cylinder engine which churns out 30bhp ...