2010 Kawasaki KLX250SF equipped 249cc liquid-cooled, four-stroke, DOHC, four-valve single cylinder engine that is properly valued through a six-speed gearbox, can only mean that Kawi is 100% confident in this powerplant’s capabilities. The frame remains the same semi-double cradle, high-tensile steel unit as the bike is pretty much out to do the same things as the S version, but without the same results off the road.