Kawasaki KLX 150 Specs Powering this dual-purpose motorcycle is a 144cc, single-cylinder, air-cooled engine that pumps out 12 PS of max power at 8000 rpm and 11.3 Nm of peak torque at 6500 rpm. There are 2 valves and a SOHC. For the gearbox, we have a 5-speed unit. Kawasaki KLX ...