The 2026 KTM 85 SX is powered by an 84.9 cc liquid-cooled single-cylinder 2-stroke engine with Keihin PWK 28 carburetor, HIDRIA digital ignition, kick start, 6-speed transmission, wet multi-disc clutch with Formula hydraulics, and 428 chain final drive delivering high-revving motocross performance for junior racers. The chassis features a chromium-molybdenum steel central-tube frame with double-cradle design and aluminum/polyamide subframe for lightweight strength and durability. Suspension includes WP XACT 43 mm upside-down front forks providing Approx. 278 mm travel and a WP XACT PDS rear monoshock delivering Approx. 289 mm travel for precise track handling and control. Braking is handled by a 240 mm front disc brake and 220 mm rear disc brake for reliable stopping power. The motorcycle rides on 19-inch front and 16-inch rear spoked wheels with motocross tires 70/100 front and 90/100 rear. Additional specifications include seat height 871 mm, ground clearance 333 mm, dry weight Approx. 69 kg, bore 47 mm, stroke 48.95 mm, and fuel tank capacity Approx. 5.4 L.