🏷️ Basic Information Identification Make: Yamaha Model: YFM660R Model Designation: Raptor 660R Model Code: YFM660R(N) Codes Vin Prefix: JY 👋 Introduction Market Position Segment: High-performance sport ATV Target Audience: Enthusiasts, recreational riders, racers, and DIY mechanics seeking in-depth technical knowledge for maintenance and repair. Competitive Analysis Competitors: Honda TRX450R, Suzuki LT-R450, Kawasaki KFX450R. Key Features Atv Highlight: Renowned for its powerful engine and capable chassis, a popular choice for trail riding and recreational off-roading during its production run. Manual Value Proposition: Provides factory-level diagnostic and repair procedures, essential for maintaining optimal performance and longevity of the YFM660R. 📋 Manual Details Coverage Areas Markets Covered: Global (specific regional variations may apply to maintenance schedules and emissions standards) Page Count Estimated Page Count: 500+ Manual Type Type: Factory Service / Repair / Workshop Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Complete overhaul, disassembly, assembly, tuning, diagnostics, lubrication, cooling system, fuel system (carburetor), ignition system, exhaust system. Transmission: Clutch (wet multi-plate), gearbox, drive shaft, final drive (chain drive), disassembly, assembly, adjustment, lubrication. Chassis: Frame, suspension (front and rear, including shocks and linkages), steering system, wheel bearings, hubs, brake systems (front and rear discs). Electrical System: Wiring diagrams, battery, charging system (stator, regulator/rectifier), lighting, ignition system components (CDI, spark plug), starter motor, instrumentation. Body And Trim: Body panels, fenders, seat, handlebars, controls, footpegs, graphics. Procedures Included Maintenance: Regular inspections, oil changes, filter replacements, chain maintenance, brake checks, carburetor cleaning and adjustment, valve clearance checks and adjustment, spark plug replacement. Troubleshooting: Diagnostic charts, common problems and their solutions, electrical system diagnostics, engine performance issues. Repair And Rebuild: Step-by-step instructions for major component overhauls, engine rebuilds, transmission repair, suspension component replacement, brake caliper servicing. Technical Specifications: Torque specifications, clearances, fluid capacities, electrical resistance values, engine timing, carburetor jetting. Technical Depth Depth: Comprehensive: Covers everything from basic maintenance to full engine and transmission rebuilds. Includes detailed diagrams, exploded views, and diagnostic procedures. 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text content (OCR processed for scanned documents) Printability: Printable pages Print Quality Image Resolution: High-resolution diagrams and images Binding Type Binding: N/A (Digital Download) Paper Type Paper Quality: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Four-stroke, SOHC, 5-valve, liquid-cooled Displacement: 660 cc Bore X Stroke: 100.0 mm x 83.9 mm Compression Ratio: 9.2:1 Starting System: Electric Start Performance Horsepower Estimate: Approximately 50-55 hp (factory figures often understated) Torque Estimate: Approximately 45-50 lb-ft Fuel System Carburetor: Mikuni BSR42, single, flat-slide Fuel Type: Unleaded gasoline, minimum 87 octane Lubrication Oil Type: Yamalube 4 (or equivalent) SAE 10W-40 API SG or higher, JASO MA certified. Oil Capacity With Filter Change: 2.40 L (2.5 US qt) Oil Capacity Without Filter Change: 2.10 L (2.2 US qt) Cooling System Coolant Type: Permanent antifreeze, mixture of 50% ethylene glycol and 50% deionized water Coolant Capacity: 1.50 L (1.6 US qt) 🔧 Transmission Standard Type: 5-speed constant mesh, manual clutch Clutch Type: Wet, multi-plate Final Drive: O-ring sealed chain Features Reverse Gear: Yes Gear Ratios: Detailed in manual (1st: 2.615, 2nd: 1.944, 3rd: 1.556, 4th: 1.292, 5th: 1.045) Transmission Fluid Fluid Type: Yamalube 4 (or equivalent) SAE 10W-40 API SG or higher, JASO MA certified. Fluid Capacity: 0.90 L (0.95 US qt) 📐 Dimensions Exterior Length: 1,845 mm (72.6 in) Width: 1,165 mm (45.9 in) Height: 1,120 mm (44.1 in) Wheelbase: 1,280 mm (50.4 in) Ground Clearance: 250 mm (9.8 in) Weights Dry Weight: 210 kg (463 lbs) Curb Weight: Not specified, typically ~225 kg (496 lbs) with fluids Fuel Tank Capacity: 10.0 L (2.6 US gal) 🛡️ Safety Features Ratings Crash Test Information: Not applicable for ATVs as per automotive standards. Active Features Brakes: Front: Dual hydraulic disc. Rear: Single hydraulic disc. Parking Brake: Mechanical disc brake (rear caliper lever lock) Passive Features Handlebars: Wide handlebars for control and leverage. Footpegs: Aggressive, serrated footpegs for grip. 💡 Technology Features Infotainment Infotainment System: N/A (Basic instrumentation only) Driver Assistance Driver Assistance Features: N/A Connectivity Connectivity Features: N/A Instrumentation Instrument Panel: Digital speedometer, odometer, trip meter, neutral indicator, reverse indicator, oil warning light, coolant temperature warning light, neutral indicator. 🔧 Maintenance Service Intervals Engine Oil Change: Every 1,000 km (600 miles) or 6 months (whichever comes first), or more frequently for hard use. Air Filter Cleaning: Every 100 km (60 miles) or monthly; replace as needed. Spark Plug Replacement: Every 3,000 km (1,800 miles) or 12 months. Valve Clearance Check: Every 3,000 km (1,800 miles) or 12 months. Chain Lubrication And Adjustment: Every 500 km (300 miles) or monthly; inspect more frequently. Fluid Specifications Engine Oil Specification: Yamalube 4 (or equivalent) SAE 10W-40 API SG or higher, JASO MA certified. Transmission Oil Specification: Yamalube 4 (or equivalent) SAE 10W-40 API SG or higher, JASO MA certified. Coolant Specification: 50% ethylene glycol and 50%...