🏷️ Basic Information Identification Make: BMW Model: R80 / R80G / R80S Production Years Covered: 1981-1989 Codes Engine Family Code: R80 Series (Air-Cooled Boxer Twin) 👋 Introduction Market Position Target Audience: BMW R80 series owners, independent repair shops, motorcycle enthusiasts. Competitive Analysis Value Proposition: Comprehensive technical resource for maintaining and repairing iconic BMW airhead motorcycles. Key Features Detail Level: Exceptional detail for the era, covering all aspects of the motorcycle. Iconic Status: Focuses on the legendary BMW R80 series, known for its durability and character. 📋 Manual Details Coverage Areas Manual Type: Complete Workshop Service Repair Manual Language: English Format: Downloadable Digital Format (likely PDF) Page Count Estimated Page Count: Detailed (typically 300-500 pages for comprehensive workshop manuals of this era) 📖 Manual Coverage Systems Covered Engine Mechanical: Full overhaul, cylinder head, pistons, crankshaft, camshaft, timing, valve adjustment, lubrication system. Fuel System: Carburetor (likely Bing) overhaul, tuning, fuel pump, fuel lines, fuel tank maintenance. Ignition System: Spark plugs, coils, timing, electronic ignition system (if applicable to specific models/years). Transmission: Gearbox disassembly, assembly, maintenance, clutch operation, final drive. Brakes: Hydraulic system, master cylinder, calipers, brake pads, brake lines, bleeding procedures, disc maintenance. Suspension: Front forks (telescopic), rear swingarm, shock absorbers, springs, bushings, maintenance. Electrical System: Wiring diagrams, battery, charging system (alternator, regulator), lighting, instrumentation, starter motor. Chassis And Bodywork: Frame, wheels, tires, fairings (if applicable), seat, handlebars, controls, exhaust system. Procedures Included Routine Maintenance: Oil changes, filter replacements, chain adjustment (if applicable), valve clearance checks, lubrication points. Troubleshooting: Diagnostic procedures for common and uncommon issues, fault finding charts. Repair And Rebuild: Step-by-step instructions for component disassembly, inspection, repair, and reassembly. Technical Specifications Data: Torque values, clearances, fluid capacities, electrical specifications, measurements. Technical Depth Diagnostic Capabilities: Comprehensive diagnostics for engine performance, electrical faults, and mechanical issues. Rebuild Procedures: Detailed instructions for complete engine, gearbox, and suspension rebuilds. Special Tool Requirements: Identification and usage of BMW-specific or specialized tools for repairs. 📊 Manual Specifications File Format File Type: Digital Download (PDF recommended for searchability and ease of use) Searchability: High (if OCR processed PDF) Print Quality Printability: High (designed for clear printing of diagrams and text) Binding Type Binding: N/A (Digital Download) Paper Type Paper Quality: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, four-stroke, boxer-twin cylinder Displacement: 797.5 cc (approx. 800 cc) Bore X Stroke: Approx. 90.0 mm x 62.0 mm Compression Ratio: Typically around 8.2:1 to 9.5:1, depending on specific model variant Valve Train: Overhead camshaft (OHC), pushrod actuated valves Performance Horsepower: Approx. 50-55 hp @ 6500 rpm (depending on variant and tuning) Torque: Approx. 60-65 Nm (44-48 lb-ft) @ 4500 rpm (depending on variant) Fuel System Carburetion: Dual Bing carburetors (e.g., 32mm or 40mm, depending on model) Fuel Type: Unleaded gasoline (minimum 90 RON, or Premium Unleaded) 🔧 Transmission Standard Transmission Type: 5-speed, constant mesh, shaft drive Optional Gearbox Ratio Options: Specific ratios vary by model R80, R80G, R80S; manual will detail these. Features Clutch: Single dry plate, cable-actuated Final Drive: Shaft drive, enclosed universal joint 📐 Dimensions Exterior Wheelbase: Approx. 1400-1450 mm (55-57 inches), varies slightly by model. Weights Dry Weight: Approx. 190-200 kg (419-441 lbs), varies by model and equipment. Gross Vehicle Weight Rating: Typically around 350-380 kg (772-838 lbs). 🛡️ Safety Features Ratings Safety Standards: Adherence to applicable motorcycle safety standards of the era. Active Features Braking System: Dual disc front brake, single disc rear brake (hydraulic, often Brembo or ATE). Passive Features Lighting: Halogen headlight, taillight, brake light, turn signals. 💡 Technology Features Infotainment Infotainment Systems: N/A (Pre-digital era, focus on mechanical and electrical functionality) Driver Assistance Driver Assistance Features: N/A (Basic motorcycle controls) Engine Management Ignition System Technology: Mechanical breaker points or early electronic ignition systems (e.g., Motronic, depending on specific year/model variant). 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 5,000 - 10,000 km (3,000 - 6,000 miles) or annually. Manual will specify. Valve Adjustment Interval: Every 10,000 km (6,000 miles) or as specified in the manual. Fluid Specifications Engine Oil Type: Mineral or semi-synthetic motorcycle oil, SAE 20W-50 or 15W-40 often recommended. Manual will have precise BMW specification. Engine Oil Capacity: Approx. 2.5 - 3.0 liters (2.6 - 3.2 US quarts) including filter. Manual confirmation needed. Transmission Oil Type: Hypoid gear oil, SAE 80W-90 (API GL-5) for gearbox and final drive. Manual confirmation needed. Brake Fluid Type: DOT 3 or DOT 4 hydraulic brake fluid. Manual confirmation needed. Known Issues Common Wear Items: Clutch wear, exhaust gasket leaks, fork seal leaks, rear shock absorber deterioration, carburetors requiring periodic adjustment. Electrical Aging: Aging wiring harness, brittle connectors, and potential issues with voltage regulators are common in older models. Carburetor Tuning: Bing carburetors require meticulous synchronization and jetting for optimal performance. 📚 Vehicle History Brand Heritage Bmw Motorcycle Legacy: BMW's long-standing reputation for engineering excellence, durability, and shaft-driven motorcycles. Model Evolution...