The latest version of the GSX-R600 engine is 20mm (0.79 inches) shorter top to bottom, 16mm (0.63 inches) narrower side to side and 54mm (2.13 inches) shorter front to rear. It weighs 1.0 kg (2.2 pounds) less than the previous version. An engine that is more compact and lighter yet produces more power and turns more rpm. With four valves per cylinder, liquid cooling, ram air induction and digital fuel injection.