The KLX450R is a high-performance off-road competition motorcycle, produced for the 2008 through 2011 model years. Building upon the formidable engineering of the KX450F motocross platform, this model was specifically adapted for demanding off-road use, including enduro and trail riding. It features a liquid-cooled, 4-stroke, DOHC 4-valve engine with a displacement of 449 cc, known for its robust power delivery and reliability. The chassis is designed around a lightweight, rigid perimeter frame, complemented by premium Kayaba suspension components for superior handling and stability across varied terrain. Its design prioritizes rider control and agility, making it a capable machine for both racing and enthusiast off-road exploration. This comprehensive workshop service manual provides detailed guidance for the maintenance, repair, and troubleshooting of your KLX450R. Covering a wide array of systems, including the engine, fuel system, transmission, drivetrain, suspension, brakes, and electrical system, this manual offers step-by-step instructions for everything from routine checks and oil changes to complete component overhauls. It includes essential technical specifications, diagnostic procedures, and troubleshooting flowcharts to assist owners and technicians in keeping the motorcycle in optimal condition. The information within is designed to ensure the longevity and performance of your off-road machine, addressing common wear items and offering practical advice for maintenance.