🏷️ Basic Information Identification Make: BMW Model: R80 GS / R100 GS Year: 1990 Codes Engine Code: R247 (typically for R80/100 GS series) 👋 Introduction Market Position Category: Dual-sport Motorcycle Target Audience: Owners and independent mechanics of BMW R80 GS and R100 GS motorcycles Competitive Analysis Historical Context: The GS series defined the premium adventure motorcycle segment, known for ruggedness and off-road capability Key Features Vehicle Design: Air-cooled boxer twin-cylinder engine, shaft drive, robust suspension, capable off-road and on-road performance Manual Value: Essential for maintaining and repairing these iconic, air-cooled BMW motorcycles. 📋 Manual Details Coverage Areas Primary Focus: Service, Repair, Workshop Vehicle Variants Covered: BMW R80 GS, BMW R100 GS Page Count Estimated Pages: N/A (Digital PDF - full coverage) Manual Type Type: Workshop Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Full disassembly, assembly, tuning, troubleshooting, diagnostics (including BMW Boxer twin-cylinder air-cooled engines) Transmission: Gearbox disassembly, assembly, maintenance, troubleshooting, lubrication Drivetrain: Shaft drive system, clutch operation, final drive maintenance Brakes: Hydraulic system, brake caliper service, fluid replacement, troubleshooting (likely Brembo systems for this era) Suspension: Front fork (Monolever/Paralever system for R100GS), rear shock absorber, swingarm, wheel bearings Electrical System: Ignition system, charging system (alternator, regulator), starter motor, lighting, wiring diagrams Fuel System: Carburetor service (likely Bing), fuel tank, fuel lines, fuel pump (if applicable) Exhaust System: Exhaust pipe and muffler maintenance, gasket replacement Bodywork And Frame: Frame inspection, body panel removal and installation, fairing (if equipped), seat maintenance Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, valve adjustments, spark plug replacement, brake bleeding Repair: Engine rebuilds, transmission overhauls, suspension component replacement, electrical diagnostics and repair, clutch replacement Troubleshooting: Diagnostic procedures for common problems, fault finding charts Assembly Disassembly: Step-by-step instructions for complete component removal and installation Special Tools: Identification and usage of BMW specific tools required for certain procedures Technical Depth Depth: Comprehensive (covers basic maintenance to full engine and transmission rebuilds) Diagnostics: Detailed diagnostic procedures and troubleshooting guides Specifications: Torque values, clearances, fluid types, electrical parameters 📊 Manual Specifications File Format File Type: PDF Searchability: Likely searchable text (depending on original scan quality) Print Quality Print Readability: High (designed for clear printing and on-screen viewing) Binding Type Binding: N/A (Digital PDF) Paper Type Paper Quality: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, four-stroke, boxer twin-cylinder Displacement R80: 797.5 cc Displacement R100: 980 cc Performance Horsepower R80: Approx. 50 hp @ 6500 rpm Horsepower R100: Approx. 60 hp @ 7000 rpm Torque R80: Approx. 57 Nm (42 lb-ft) @ 5000 rpm Torque R100: Approx. 70 Nm (52 lb-ft) @ 5500 rpm Fuel System Carburetor Type: Dual Bing 32mm CV or 40mm (depending on specific model variant) Fuel Type: Unleaded gasoline (minimum 91 RON/87 AKI recommended) Engine Internals Bore Stroke R80: 83 mm x 75 mm Bore Stroke R100: 94 mm x 70.8 mm Compression Ratio: Approx. 8.5:1 to 9.5:1 (varies by model) 🔧 Transmission Standard Type: 5-speed manual gearbox Drive: Shaft drive to rear wheel Features Clutch Type: Single dry plate clutch, cable-actuated Gearbox Oil Type: API GL-5, SAE 75W/90 or 80W/90 gear oil 📐 Dimensions Exterior Length: Varies by model, typically around 2200-2300 mm Width: Varies by model, typically around 800-900 mm (handlebar width) Height: Varies by model, typically around 1300-1400 mm (seat height) Weights Dry Weight R80: Approx. 195-205 kg Dry Weight R100: Approx. 205-215 kg Fuel Tank Capacity: 21 Liters (including 3-4 Liter reserve) 🛡️ Safety Features Ratings Safety Certification: N/A (Motorcycle safety ratings not standardized as cars) Active Features Braking System: Dual front disc brakes (often Brembo), single rear disc brake Suspension Stability: Monolever (R80GS) and Paralever (R100GS) rear suspension systems for improved stability Passive Features Lighting: Halogen headlamp, LED tail light (original incandescent) 💡 Technology Features Infotainment Infotainment System: N/A (This era of motorcycles did not feature electronic infotainment systems) Driver Assistance ABS: N/A (ABS was not commonly available or standard on these models) Connectivity Connectivity Features: N/A (No integrated electronic connectivity) Engine Management Ignition System: Electronic ignition (CDI or similar) 🔧 Maintenance Service Intervals Oil Change Interval: Every 5,000 - 10,000 km or annually (refer to manual for precise intervals) Valve Adjustment Interval: Every 10,000 - 15,000 km Spark Plug Replacement: Every 10,000 - 15,000 km Fluid Specifications Engine Oil Type: API SG or higher, SAE 20W-50 or 10W-40 motorcycle specific oil Engine Oil Capacity: Approx. 2.75 Liters (with filter change) Brake Fluid Type: DOT 4 Known Issues Common Problems: Oil leaks (especially around engine cases and pushrod seals), clutch wear, aging electrical connectors, suspension wear, carburetor synchronization issues. Repair Focus: The manual will guide on addressing these typical wear-and-tear items and potential failure points. 📚 Vehicle History Brand Heritage Bmw Motorrad: BMW Motorrad has a long history of producing reliable and capable motorcycles, particularly known for their boxer engines. Model...