🏷️ Basic Information Identification Make: BMW Model: R80 Year: 1979 Codes Engine Code: R80/7 👋 Introduction Market Position Market Segment: The BMW R80 series represented BMW's entry into the larger displacement touring and everyday motorcycle market in the late 1970s, competing with Japanese and British offerings. Competitive Analysis Competitors: Competed against models like the Honda CB750, Kawasaki KZ750, Suzuki GS750, and various Triumph Bonneville models, offering a shaft-driven, robust, and comfortable alternative. Key Features Unique Selling Points: Shaft drive, air-cooled boxer twin engine known for reliability and low-end torque, comfortable ergonomics for touring, build quality associated with BMW. 📋 Manual Details Coverage Areas Primary Coverage: Comprehensive service, repair, and maintenance for the BMW R80 1979 motorcycle. Page Count Estimated Pages: 200-300 pages (typical for a full service manual of this era) Manual Type Type: Full Service and Repair Manual Language Language: English Format Format: Digital (likely PDF), potentially Printable 📖 Manual Coverage Systems Covered Engine: Detailed procedures for disassembly, assembly, inspection, and repair of the R80 twin-cylinder boxer engine, including cylinders, pistons, crankshaft, camshaft, valves, timing, lubrication system, and cooling. Fuel System: Carburetor tuning and rebuilding (likely Bing carburetors), fuel tank, fuel lines, and fuel pump (if applicable). Transmission Drivetrain: Clutch operation and adjustment, gearbox disassembly and assembly, driveshaft, final drive, and universal joints. Electrical System: Ignition system (points, coil, spark plugs), charging system (alternator, rectifier, battery), lighting system (headlight, taillight, indicators), starter motor, and wiring diagrams. Suspension: Front fork maintenance, seal replacement, oil levels, and rear shock absorber adjustment and replacement. Brakes: Drum brake and disc brake servicing, including pad replacement, caliper overhaul, brake fluid replacement, and bleeding procedures. Wheels Tires: Wheel bearing inspection and replacement, tire mounting and balancing, spoke tensioning. Chassis Frame: Frame inspection, steering head bearing adjustment, and general chassis components. Bodywork: Fender, tank, and seat removal and installation procedures. Procedures Included Routine Maintenance: Oil changes, filter replacement, spark plug inspection, chain adjustment, brake adjustments, tire pressure checks. Troubleshooting: Diagnostic charts and procedures for common problems, electrical faults, and engine performance issues. Repair Rebuild: Step-by-step instructions for major component overhaul and replacement, including engine rebuilds, transmission repairs, and suspension overhauls. Adjustments: Valve adjustments, carburetor synchronization, ignition timing adjustments, clutch and throttle cable adjustments. Torque Specifications: Crucial torque values for all fasteners and critical components. Technical Depth Depth: Highly detailed, covering everything from basic service to full engine and transmission rebuilds. Suitable for both amateur mechanics and professional technicians. 📊 Manual Specifications File Format Digital Quality: Clear, legible text and diagrams. Searchable PDF functionality is expected for ease of use. Print Quality Print Readability: High-resolution scans or original formatting ensuring clarity of diagrams and text for printing. Binding Type Binding: N/A (for digital format), if printed would be spiral-bound or saddle-stitched for workshop use. Paper Type Paper Quality: N/A (for digital format), typically printed on durable, oil-resistant paper for workshop environments. ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, four-stroke, horizontally opposed twin-cylinder (boxer) Displacement: 797.5 cc (797.5cc) Bore X Stroke: 82 mm x 75.6 mm Compression Ratio: 9.2:1 (typical for R80/7) Valve Train: OHV, two valves per cylinder, pushrod actuated Performance Horsepower: Approx. 50 hp (37 kW) at 6,500 rpm Torque: Approx. 62 Nm (46 lb-ft) at 5,000 rpm Fuel System Carburetors: Dual Bing 32mm (likely Type 94/32 or similar) Fuel Type: Unleaded gasoline, minimum 91 octane (RON+MON)/2 Fuel Capacity: 24 Liters (6.3 US gallons) 🔧 Transmission Standard Transmission Type: 5-speed manual gearbox Clutch: Single dry plate, hydraulically operated Final Drive: Shaft drive to rear wheel Features Gear Ratios: Specific gear ratios are detailed in the manual, crucial for performance tuning and rebuilds. Transmission Fluid Type: Gear oil, API GL-5, SAE 80W/90 (specific BMW recommendation to be confirmed in manual) 📐 Dimensions Exterior Length: Approx. 2,220 mm (87.4 in) Width: Approx. 850 mm (33.5 in) Height: Approx. 1,230 mm (48.4 in) (to handlebars) Weights Dry Weight: Approx. 215 kg (474 lbs) Gross Vehicle Weight: Approx. 400 kg (882 lbs) Wheels Tires Front Tire Size: 3.00-18 or 100/90-18 Rear Tire Size: 4.00-18 or 120/90-18 Wheelbase: Approx. 1,440 mm (56.7 in) Wheel Bolt Pattern: N/A (Cast alloy or spoked wheels, specific hub details in manual) 🛡️ Safety Features Ratings Crash Safety: Motorcycle safety ratings are not comparable to automotive standards; focus on design and handling for safe operation. Active Features Braking System: Dual front disc brakes with caliper, single rear drum brake (later models may have rear disc). Brake fluid type: DOT 3 or DOT 4. Lighting: Halogen headlight, brake light, taillight, and turn signals. 💡 Technology Features Infotainment Infotainment System: N/A - This is a 1979 motorcycle, technology was minimal. Analog gauges, basic lighting. Driver Assistance Assistance Features: N/A - No electronic rider aids. Focus on rider skill and well-maintained mechanical systems. 🔧 Maintenance Service Intervals Engine Oil Change: Every 5,000 km (3,000 miles) or annually. Check...