The 2025 KTM 85 SX 17/14 is a big step forward for young racers moving up toward full-size bikes. KTM redesigned it for 2025 to work like a smaller version of its full-size SX motocross bikes. It was tested on tracks in Europe, North America and Australia, and it handles better, delivers power more smoothly and holds its pace better over long races.
Updated 84.9 cc two-stroke: A new combustion chamber and smaller spark plug, a new ignition, a new exhaust and revised carburetor settings add low- and mid-range power and torque.
Smoother shifting: The 6-speed gearbox has a newly coated shift drum, and the clutch is a hydraulic Formula wet multi-disc unit.
New chassis: A new chromoly steel frame with a 26.5° steering head comes with a new aluminum-reinforced polyamide subframe and a new swingarm.
Adjustable WP XACT suspension: The 43 mm AER air fork is set with a pump, and the PDS shock adjusts for preload, compression and rebound.
Strong brakes: Hydraulic discs, 240 mm front and 220 mm rear.
Sized for younger riders: 17-inch front and 14-inch rear wheels on Maxxis MaxxCross MX-ST tires, with an 845 mm (33.3 in) seat height.
Styled like the big bikes: Slimmer new bodywork, a new fuel tank, Pankl radiators and a new airbox for better airflow.
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