The 2016 450 SX-F and 450 XC-F represent the pinnacle of high-performance motocross and cross-country racing motorcycles, engineered by a renowned Austrian manufacturer with a rich heritage in off-road competition. These models are celebrated for their potent 4-stroke, liquid-cooled, DOHC engines, typically displacing around 449.3 cc, delivering an estimated 55-60+ horsepower and strong torque figures. Equipped with advanced suspension components, including front forks, these motorcycles offer exceptional handling and damping capabilities tailored for aggressive riding. The SX-F variants are FIM homologated for competition, while the XC-F designation signifies their specialization for cross-country racing, making them the choice for competitive riders and enthusiasts seeking factory-level performance and reliability. This comprehensive English-language service repair manual is designed to provide authorized service and repair information for all 2016 450 SX-F and 450 XC-F models. It covers every aspect of the vehicle, from routine maintenance procedures like oil changes and filter replacements to complete engine teardown, transmission overhauls, suspension servicing, and brake system repairs. The manual includes detailed troubleshooting guides, diagnostic flowcharts, precise torque specifications, component clearances, wiring diagrams, and schematics. Its depth of technical detail ensures that both dealership technicians and experienced mechanics can maintain and repair these high-performance machines to factory standards, ensuring optimal performance and longevity.