The 2025 KTM 390 Adventure X is powered by a 398.7 cc liquid-cooled single-cylinder 4-stroke DOHC engine with Bosch electronic fuel injection, ride-by-wire throttle, electric start, 6-speed transmission, PASC slipper clutch, and 520 X-Ring chain final drive delivering Approx. 44 hp and 39 Nm torque for versatile adventure touring performance. The chassis features a powder-coated steel trellis frame with WP APEX 43 mm front suspension providing Approx. 200 mm travel and a WP APEX rear monoshock delivering Approx. 200 mm travel for balanced on-road and off-road capability. Braking is handled by a 320 mm front disc with Bybre two-piston radial caliper and a 240 mm rear disc with Bybre single-piston caliper supported by Bosch ABS with Offroad mode. The motorcycle rides on 19-inch front and 17-inch rear cast wheels with 100/90 front and 130/80 rear adventure tires. Additional specifications include seat height 825 mm, wheelbase Approx. 1464 mm, ground clearance Approx. 232 mm, dry weight Approx. 165 kg, compression ratio 12.6:1, bore 89 mm, stroke 64 mm, and fuel tank capacity Approx. 14 L.