This manual covers the 2008 450 EXC-R (E), a high-performance four-stroke, single-cylinder enduro motorcycle renowned for its power, agility, and robust off-road capability. Built with a chromoly steel trellis frame and featuring WP Extrem Suspension, this Austrian-manufactured machine is designed for enthusiast riders and competitive off-road racers. Its 449.3 cc liquid-cooled engine, equipped with a Keihin FCR-MX 41 carburetor, delivers estimated horsepower of 50-55 HP and torque of 45-50 Nm, making it a formidable contender in its class. The 450 EXC-R is celebrated for its 'Ready to Race' philosophy, inheriting a legacy of off-road racing dominance. This comprehensive Service Repair Workshop Manual, written in English, provides detailed guidance for maintaining and repairing the 2008 450 EXC-R (E). It covers all essential systems, including the engine, fuel, ignition, transmission, chassis, brakes, and electrical systems, offering expert-level insights for professional mechanics and experienced DIY users. Procedures for routine maintenance, such as oil changes and valve clearance checks, along with in-depth repair instructions for engine rebuilds, suspension service, and electrical diagnostics, are clearly outlined. The manual includes crucial technical specifications, torque values, component diagrams, and troubleshooting flowcharts, enabling owners and technicians to optimize performance and ensure the longevity of this high-performance off-road motorcycle.