🏷️ Basic Information Identification Make: Yamaha Model: XS650SF Model Code: XS650-2F Year: 1979 Generation: XS650 Series (2nd Gen) 📋 Manual Details Document Manual Type: Factory Service Repair Manual Manual Source: Official Factory Language: English Format: PDF Delivery Method: Download Printability: Fully Printable Software Requirements: Adobe PDF Reader ⚙️ Engine Specifications Engine Engine Type: 4-stroke, Air Cooled, Parallel-twin Displacement: 653 cc Bore X Stroke: 75.0 x 73.5 mm Compression Ratio: 8.5:1 Carburetion: 2 x Mikuni VM34SC (or similar) Valve Train: SOHC, 2 valves per cylinder Ignition: CDI Starting System: Electric and Kick Starter 🔧 Transmission Drivetrain Transmission Type: 5-speed Constant Mesh Primary Drive: Gear Clutch: Wet, multiple-disc Final Drive: Chain 🔧 Maintenance Service Information Engine Oil Capacity: 2.4 L (with filter change) Spark Plug Gap: 0.6 - 0.7 mm Tire Pressure Front: 25 PSI Tire Pressure Rear: 28 PSI 📄 Vehicle Features Chassis Frame Type: Steel, Double Cradle Brakes Front Brake Type: Disc Rear Brake Type: Drum Suspension Front Suspension Type: Telescopic Fork Rear Suspension Type: Swingarm, Dual Shock Absorbers Wheels Tires Front Wheel Size: 19 inch Rear Wheel Size: 18 inch Electrical Battery Voltage: 12V 📄 Manual Content Coverage Topics Covered Systems: General Information, Fuel System, Cooling System, Engine Top End, Clutch, Lubrication System, Engine Removal/Installation, Crankshaft/Transmission, Wheels/Tires, Final Drive, Brakes, Suspension, Steering, Frame, Electrical System, Appendix