This manual pertains to the YFZ450S, a versatile All-Terrain Vehicle designed for recreational and sport riding. Engineered with a robust 4-stroke, 449 cc engine, this ATV features a liquid-cooled system, a Keihin FCR39 carburetor, and a wet, multiple-disc clutch, delivering potent performance. Its chassis is built for agility and control, boasting independent double wishbone front suspension, a swingarm rear suspension, and reliable dual hydraulic disc front brakes and a hydraulic disc rear brake. With a 5-speed constant mesh transmission and chain drive, the YFZ450S is a testament to commitment to quality and performance in the ATV market.

This comprehensive Factory Service Repair Manual, provided in French, is an essential resource for maintaining and repairing your YFZ450S. It covers a wide range of critical information, including detailed maintenance procedures, troubleshooting guides for common issues, precise technical specifications, and vital safety guidelines. Whether you are an owner performing routine upkeep or a technician undertaking complex repairs, this manual provides the necessary knowledge and step-by-step instructions to ensure your ATV operates at peak performance and longevity, utilizing recommended 4 oil and adhering to specified capacities.