🏷️ Basic Information Identification Make: Yamaha Model: Raptor YFM 660 Category: ATV (All-Terrain Vehicle) 👋 Introduction Market Position Segment: High-performance sport ATV, positioned for aggressive trail riding and recreational use. Competitive Analysis Competitors: Competed against models like Honda TRX450R, Suzuki LT-R450, Polaris Predator 500, and Kawasaki KFX400/700. Key Features Engine Power: Renowned for its powerful 660cc engine, offering strong torque and acceleration. Handling: Agile handling and capable suspension system designed for off-road performance. Durability: Yamaha's reputation for building robust and reliable engines and chassis. 📋 Manual Details Coverage Areas General Information: Included Specifications: Included Periodic Checks And Adjustments: Included Chassis: Included Engine: Included Cooling System: Included Carburetion: Included Electrical System: Included Troubleshooting: Included Page Count Total Pages: 328 Manual Type Type: Service Manual / Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Detailed coverage of the 660cc liquid-cooled, SOHC, 4-valve, 5-valve engine. Cooling System: Radiator, fan, coolant circuits, thermostat operation and service. Fuel System: Carburetor (Mikuni BSR38) specifications, adjustments, cleaning, and overhaul. Ignition System: CDI unit, ignition timing, spark plug specifications, and troubleshooting. Electrical System: Wiring diagrams, lighting, battery, charging system (stator, regulator/rectifier), starter motor. Transmission: 5-speed manual transmission with reverse, clutch operation, and internal component service. Drivetrain: Shaft drive, bevel gear case, front/rear driveshaft, differential (if applicable). Suspension: Front independent suspension (A-arms, shocks), rear swingarm, shock absorber adjustments and service. Brakes: Hydraulic disc brakes (front and rear), caliper service, pad replacement, brake fluid specifications. Steering: Handlebar assembly, steering shaft, tie rods, and steering bearing service. Frame And Bodywork: Frame inspection, body panel removal/installation, seat, fenders, and rack components. Procedures Included Routine Maintenance: Oil changes, filter replacements, chain adjustment, air filter cleaning, spark plug checks. Troubleshooting Diagnostics: Systematic diagnostic procedures for common performance issues, electrical faults, and mechanical problems. Engine Overhaul: Top-end rebuild (cylinder head, piston, rings), bottom-end service (crankshaft, bearings, seals). Transmission Rebuild: Disassembly, inspection, and reassembly of the gearbox and clutch components. Carburetor Tuning: Jetting, float level adjustment, idle speed, and mixture screw settings. Electrical Component Testing: Testing of stator output, regulator/rectifier function, battery condition, and starter solenoid. Suspension Adjustments: Preload, compression, and rebound damping adjustments for optimal ride handling. Brake System Service: Bleeding, caliper overhaul, pad and rotor replacement. Wheel Bearing Service: Replacement of front and rear wheel bearings. Lubrication Points: Identification and recommended lubrication for all critical points. Technical Depth Depth: Comprehensive. Covers routine maintenance to full engine and transmission rebuilds, including detailed troubleshooting and electrical diagnostics. 📊 Manual Specifications File Format File Type: Portable Document Format (PDF) Print Quality Clarity: Likely high resolution, suitable for printing, with clear diagrams and text. Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, liquid-cooled, SOHC, 5-valve Displacement: 659cc Bore X Stroke: 95.0 mm x 92.7 mm Compression Ratio: 9.1:1 Performance Horsepower: Approx. 45-50 hp (manufacturer figures often not explicitly stated, performance tune dependent) Torque: Strong mid-range torque delivery Fuel System Carburetor: Mikuni BSR38 with throttle position sensor (TPS) Lubrication Oil Type: Yamalube 4 (or equivalent) SAE 10W-40, API SG, JASO MA Oil Capacity: Approx. 2.2 L (with filter change) Ignition Ignition System: TCI (Transistor Controlled Ignition) 🔧 Transmission Standard Type: 5-speed manual with reverse Clutch: Wet, multiple-disc Features Drivetrain: Shaft drive to rear wheels, 2WD Transmission Oil: Yamalube 4 (or equivalent) SAE 10W-40, API SG, JASO MA Transmission Oil Capacity: Approx. 0.85 L 📐 Dimensions Exterior Length: Approx. 1830 mm (72.0 in) Width: Approx. 1140 mm (44.9 in) Height: Approx. 1035 mm (40.7 in) Wheelbase: Approx. 1280 mm (50.4 in) Weights Curb Weight: Approx. 206 kg (454 lbs) Fuel Capacity: 10.0 L (2.6 gal) with 1.0 L reserve 🛡️ Safety Features Ratings Atv Safety: ATVs are inherently high-risk vehicles. Users must always wear helmets, eye protection, gloves, and appropriate riding gear. Follow all safety warnings in the manual and on the vehicle. Active Features Braking System: Triple hydraulic disc brakes for strong stopping power. Passive Features Throttle Limiter: Often adjustable throttle limiter to control maximum speed, particularly for novice riders. Parking Brake: Handlebar-mounted parking brake. 💡 Technology Features Infotainment Features: N/A (As a sport ATV, advanced infotainment systems are not a feature. Basic instrumentation includes speedometer, odometer, trip meter, and indicator lights). Driver Assistance Features: N/A (No electronic driver assistance systems like traction control or ABS are present on this model). Connectivity Features: N/A 🔧 Maintenance Service Intervals Engine Oil: Every 1,000 km (620 miles) or 3 months, whichever comes first. Inspect more frequently for aggressive riding. Air Filter: Clean every 1,000 km (620 miles) or 3 months. Replace as needed. Spark Plug: Inspect every 1,000 km (620 miles). Replace as needed. Recommended plug: NGK CR7E Valve Clearance: Check every 3,000 km (1,860 miles) or 1 year. Intake: 0.09-0.13 mm; Exhaust: 0.13-0.17 mm. Brake Fluid: Replace every 2...