The changes made to the 250 SX-F engine for 2019 are a new exhaust camshaft with different timing, a new header pipe with a further advanced called a Flow Design Header (FDH), a reworked muffler, a Pankl transmission, a new 44mm throttle body, an improved seal on the Manifold-Absolute-Pressure (MAP) sensor, new ECU maps, a new lithium-ion starter battery, a reworked , different intake snorkels, and revised traction control and launch control settings.
The chassis updates for 2019 include a new black frame with a 2-percent increase in longitudinal stiffness and a 10-percent increase in torsional stiffness, newly designed frame guards, a stiffer upper triple clamp, a revised swingarm with a longer slot for the rear axle, a 40mm-longer subframe, redesigned radiators that are mounted 12mm lower, a new fuel tank, new bodywork, a newly shaped seat, new spoke nipples (designed to reduce the frequency of tightening spokes), a reworked bar pad and cover, and new graphics.
The increased rigidity of the frame is the most immediately noticeable change when riding the new 250 SX-F as the orange machine responds quicker and easier to rider input. Additionally, the stiffer frame makes the handling feel sharper, especially in corners. The improvement in cornering does not negatively affect the chassis stability as the bike maintains great straight-line stability at high speeds. The 2019 model is noticeably slimmer in the radiator shroud area while the newly shaped seat makes it easier to move forward and back.
The KTM 250 SX-F was a favorite of multiple test riders in last year’s 250F MX Shootout for several reasons. It has class-leading top-end and over-rev power, plush suspension easily adjusted with either air pressure or clicker settings, and a forgiving chassis that has a great balance between good cornering ability and straight-line stability.