2026 Yamaha YZ450F — What’s New Chassis & Suspension All-new frame design with a thinner front downtube and restructured inner and outer frame sections to finely balance rigidity and flex, delivering a more stable ride and improved front-end feedback for sharper cornering  Suspension enhancements: Developed with KYB, the updated fork settings and high-performance rear shock offer smoother damping and diminished bump reaction. The rear shock now includes a rider-friendly, hand-operated low-speed compression clicker . Engine & Performance Refined power delivery with redesigned intake port and ducting, plus intake/exhaust resonators to improve low-to-midrange throttle response, maintain top-end performance, and reduce noise to meet FIM/AMA regulations  Hydraulic clutch for smoother lever feel, consistent engagement, and reduced maintenance. It includes an updated inner hub design for better lubrication and endurance  Electronics & Bodywork ECU-Lock anti-theft system—a first for off-road motorcycles—lets riders secure the bike via password-controlled lock through the Power Tuner app  Continued Power Tuner App integration for customizable engine mapping, traction control adjustments, launch control tuning, and now anti-theft protection  Updated bodywork includes a slimmer front number plate, two-piece side covers, sharper rear fender, and a honeycomb-patterned seat that improves grip while maintaining forward mobility