The 2026 Yamaha YZ450F is powered by a 450 cc liquid-cooled single-cylinder 4-stroke DOHC reverse-head engine with Mikuni electronic fuel injection and 44 mm throttle body, electric start, 5-speed transmission, wet multi-plate clutch, and chain final drive delivering strong, linear motocross performance with excellent low-end torque and top-end power. The chassis features a lightweight aluminum bilateral beam frame designed for optimal rigidity balance, improving cornering precision and straight-line stability. Suspension includes fully adjustable KYB Speed Sensitive System upside-down front forks providing Approx. 310 mm travel and a KYB rear monoshock with linkage delivering Approx. 315 mm travel for race-ready control. Braking is handled by a 270 mm front hydraulic disc and 240 mm rear disc brake for reliable stopping power. The motorcycle rides on 21-inch front and 19-inch rear wheels with motocross tires. Additional specifications include seat height Approx. 965 mm, ground clearance Approx. 350 mm, wet weight Approx. 109 kg, and fuel tank capacity Approx. 6.2 L.