Chassis
For model year 2019 all adult models receive a generation changing update with KTM engineers targeting a further weight reduction. All SX models feature a re-worked frame for improved stiffness, handling and straight-line stability, a longer subframe, a revised rear axle slot and all-new bodywork. A brand-new appearance with new graphics compliment a newly shaped seat and new fuel tank. A new air filter box offers improved protection of the air filter and better air flow for both the two-strokes and four-strokes that is claimed to contribute to a more efficient power delivery and improved performance.
New radiators offer efficient cooling with improved positioning for mass centralization, while a stronger lithium ion battery for the E-starter fits in with the reworked wiring harness for a compact electrical system. An updated triple clamp is designed to improve handling along with new suspension settings.
All models continue to enjoy impressive components such as Brembo brakes, WP suspension, NEKEN handlebar, Dunlop tires, plus a map select switch with integrated traction control, launch control and map selection on the 4-stroke machines.
Engine
All models in the KTM SX range have received major engine revisions over previous models. The KTM 250 SX-F and KTM 350 SX-F models enjoy a newly designed DS clutch, while all four-strokes boast revised transmissions and a state-of-the-art Keihin engine management system with a reworked throttle body and improved electronics package.
The KTM 125 SX, KTM 150 SX and KTM 250 SX all offer revised carburettor settings, with a new transmission and new clutch in each amongst other improvements.
In addition to engine refinements on all models, the highlight KTM 450 SX-F model enjoys a newly developed SOHC cylinder head for reduced weight and improved mass centralization, a new camshaft with a shorter valve timing and improved surface along with a low-friction chain guide with a DLC coating.
“After the race is before the race. This is certainly a statement that we at KTM live by. Once again we enjoyed incredible success around the globe with our offroad teams last season, but this is a testament to all the hard work of those involved and especially to the R&D teams in both Mattighofen, Austria, and the USA; racing success is part of the motivation that ensures we continue producing READY TO RACE serial machinery right out of the crate,” said Joachim Sauer, KTM Senior Product Manager Offroad.
“A tireless strive to continue thinking and re-thinking on how we can develop our machines has led us to the next generation of KTM SX models that will soon be available on the market. There are some serious revisions over previous models with the KTM 450 SX-F a true highlight with its incredible handling thanks to its light weight and powerhouse engine. Our program to develop the next generation of raw talent is complimented by a full range of models from the KTM 50 SX to bikes capable of racing at Grand Prix level. Our goal is clear – setting the benchmark in motocross technology by creating the sharpest weapons for the job, for amateurs to the pros,” concluded Sauer.
