🏷️ Basic Information Identification Make: Yamaha Model: YFZ 450 Year: 2003-2004 Product Category: ATV 📋 Manual Details Documentation Manual Type: Service Repair Manual Language: English Content Sections Covered: General Information, Specifications, Periodic Checks And Adjustments, Engine, Cooling System, Carburetor, Chassis, Electrical, Troubleshooting 🔧 Transmission Drivetrain Type: 5-Speed Manual Drive System: Chain Drive 🔧 Maintenance Engine Oil Recommended Oil Type: Yamalube 4 (10W-40) or equivalent motorcycle oil Oil Capacity: 1.73 L (1.83 US qt) Periodic Checks Periodic Checks And Adjustments: Covered in manual 📄 Specifications Device Characteristics Device Type: All-Terrain Vehicle (ATV) Intended Use Intended Use: Recreational Off-Road Riding Wheels And Tires Front Tire Size: AT21x7-10 Rear Tire Size: AT20x10-9 Brakes Front Brake Type: Dual Hydraulic Disc Rear Brake Type: Hydraulic Disc 📄 Performance Specs Engine Engine Type: 4-Stroke, DOHC, 5-Valve Displacement: 449 cc Fuel Type: Unleaded Gasoline Carburetor Carburetor: Mikuni BSR33/1 📄 Operational Details Cooling Cooling System: Liquid-Cooled