2015 Kawasaki KX450F And KX250F Preview

The 2015 Kawasaki KX250F’s DOHC four-stoke engine has the same 77.0 x 53.6mm bore and stroke as the 2014 model, but it gets a new F1-style bridged box piston, along with a revised lower fuel injector, a heavier ignition rotor and revised ECU mapping to improve low-end and mid-range tractability.