The Comet 650 S R is a sportbike renowned for its potent 647cc liquid-cooled, 90-degree V-twin engine, delivering approximately 80 horsepower and 63 Nm of torque. This performance is housed within a steel trellis frame, offering a balance of agility and stability for both spirited riding and everyday commuting. With its aggressive styling, capable handling, and competitive pricing, the Comet 650 S R has established itself as a compelling option in the mid-sized sportbike market, appealing to riders seeking a blend of performance and value. This comprehensive service and repair manual provides detailed information for the maintenance, diagnostics, and repair of the Comet 650 S R. It covers all essential systems, including the engine, fuel system, transmission, electrical components, chassis, suspension, and brakes. Within its extensive pages, you will find step-by-step procedures for routine maintenance, engine rebuilds, electrical diagnostics, and component overhauls, along with crucial technical specifications and troubleshooting guidance. This manual is an indispensable resource for owners, technicians, and mechanics aiming to ensure the optimal performance and longevity of their Comet 650 S R. 🏷️ Basic Information Identification Make: Hyosung Model: Comet 650 S R Product Type: Service and Repair Manual 👋 Introduction Market Position Motorcycle Segment: Sportbike / Naked Sportbike Competitive Analysis Competitors: Directly competes with other mid-sized naked and faired sportbikes from manufacturers like Kawasaki (Ninja 650/ER-6n), Suzuki (SV650), Yamaha (FZ6/MT-07), and Honda (CB500F/CBR500R). Key Features Design Philosophy: Offers a performance-oriented V-twin engine in a sporty chassis, providing a balance of power, handling, and aggressive styling at a competitive price point. 📋 Manual Details Coverage Areas Manual Coverage Scope: Comprehensive service, repair, diagnostics, and maintenance for Hyosung Comet 650 S and R models. Page Count Estimated Page Count: 400-600 pages (typical for this class of motorcycle manual) Manual Type Manual Type: Factory-level Service and Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Detailed breakdown of the 650cc V-twin engine, including cylinder head, valve train, crankshaft, piston, connecting rods, lubrication system, cooling system, and fuel injection. Fuel System: EFI system diagnostics, fuel pump, injectors, throttle body, sensors (TPS, MAP, IAT, ECT), and emissions control. Transmission: Clutch operation, gear shifting mechanism, gearbox internals, lubrication, and troubleshooting. Electrical System: Battery, charging system (stator, regulator/rectifier), ignition system (ECU, coils, spark plugs), lighting, starter motor, and wiring diagrams for all circuits. Chassis And Suspension: Frame inspection, front fork service (oil change, seal replacement), rear shock absorber adjustment and overhaul, steering head bearing service. Brakes: Front and rear brake caliper overhaul, master cylinder service, brake line replacement, bleeding procedures, pad and disc inspection and replacement. Cooling System: Radiator, coolant hoses, thermostat, water pump, and coolant flush and refill procedures. Exhaust System: Exhaust pipe inspection, muffler, and lambda sensor (if applicable). Bodywork And Trim: Fairing removal and installation, seat, fuel tank, fenders, and other cosmetic components. Wheels And Tires: Wheel bearing inspection and replacement, tire pressure, and mounting/balancing procedures. Procedures Included Routine Maintenance: Oil and filter changes, air filter replacement, spark plug inspection/replacement, chain adjustment and lubrication, brake fluid checks, coolant level checks. Troubleshooting: Systematic diagnostic procedures for common and uncommon issues, fault code interpretation (if applicable), and problem isolation techniques. Engine Rebuild: Detailed instructions for engine disassembly, inspection of internal components, reassembly, and break-in procedures. Suspension And Steering Overhaul: Fork seal replacement, shock absorber rebuild, steering stem bearing replacement. Brake System Overhaul: Caliper rebuild, master cylinder replacement, line bleeding. Electrical Diagnostics And Repair: Wiring diagram interpretation, component testing, fault finding for lighting, ignition, charging, and starter systems. Fuel System Cleaning And Adjustment: Injector cleaning, throttle body synchronization, sensor testing. Technical Depth Depth Of Information: Provides detailed specifications, torque values, clearance measurements, diagnostic procedures, and step-by-step repair instructions suitable for both DIY enthusiasts and professional mechanics. 📊 Manual Specifications File Format File Type: PDF Print Quality Print Readability: High-resolution, fully searchable text and clear, legible diagrams for easy printing and on-screen viewing. Binding Type Binding: Not Applicable (Digital PDF Download) Paper Type Paper Quality: Not Applicable (Digital PDF Download) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, 4-stroke, 8-valve, DOHC, 90-degree V-twin Displacement: 647cc Bore X Stroke: 81.5 mm x 62 mm Compression Ratio: 11.3:1 Max Power: Approximately 80 HP (59.6 kW) @ 9000 rpm (Varies slightly by model year and specific variant) Max Torque: Approximately 63 Nm (46.5 lb-ft) @ 7000 rpm (Varies slightly by model year and specific variant) Performance Top Speed: Estimated 210+ km/h (130+ mph) Fuel System Fuel Delivery: Electronic Fuel Injection (EFI) with dual throttle bodies Fuel Type: Unleaded gasoline, minimum 91 octane Fuel Tank Capacity: Approximately 17 Liters (4.5 US gal) 🔧 Transmission Standard Transmission Type: Constant-mesh, 6-speed Clutch Type: Wet, multi-plate Features Final Drive: O-ring sealed chain 📐 Dimensions Exterior Length: Approximately 2100 mm (82.7 in) Width: Approximately 750 mm (29.5 in) Height: Approximately 1100 mm (43.3 in) Wheelbase: Approximately...