🏷️ Basic Information Identification Make: BMW Model: R80 GS / R100 GS Year: 1987 👋 Introduction Market Position Market Position: Essential resource for owners and mechanics of the iconic BMW R80GS and R100GS adventure motorcycles. Competitive Analysis Competitive Advantage: Provides in-depth, professional-level repair and maintenance information that surpasses basic owner's manuals, enabling owners to perform complex tasks. Key Features Key Feature 1: Covers both R80GS and R100GS variants, maximizing utility for owners of either model. Key Feature 2: Detailed diagrams and illustrations crucial for visual understanding of procedures. Key Feature 3: Authoritative information trusted by professional technicians. 📋 Manual Details Coverage Areas Primary Coverage: Service, Repair, Workshop Page Count Estimated Page Count: Extensive (typical for comprehensive workshop manuals, often 500+ pages) Manual Type Manual Type: Workshop Manual / Service Manual Language Language: English (common for international sales, but check specifics if possible) Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Service And Repair: Full coverage including disassembly, assembly, inspection, and adjustment of all engine components. Transmission And Drivetrain: Detailed procedures for gearbox, clutch, driveshaft, and final drive maintenance and repair. Chassis And Suspension: Front forks (including BMW's monolever system), rear swingarm, shock absorbers, and steering head bearings. Braking System: Front and rear brake systems, including caliper overhauls, fluid changes, and adjustment. Electrical System: Wiring diagrams, component testing, ignition system, lighting, charging system, and starter motor. Fuel System: Carburetor service (likely Bing or similar), fuel tank, fuel lines, and fuel pump (if applicable). Exhaust System: Inspection and replacement of exhaust components. Bodywork And Frame: Minor bodywork, frame inspection, and component removal/installation. Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug checks, chain adjustment, valve clearance checks and adjustments. Troubleshooting Guides: Diagnostic procedures for common problems and symptom-based fault finding. Engine Rebuilding: Detailed steps for engine disassembly, component inspection, machining specifications, and reassembly. Suspension Overhaul: Fork seal replacement, fork oil changes, shock absorber servicing. Carburetor Tuning And Rebuild: Step-by-step instructions for carburetor cleaning, adjustment, and rebuild. Electrical Diagnostics: Testing and repair of electrical circuits, charging system issues, ignition timing adjustments. Technical Depth Depth Of Information: Comprehensive: Covers everything from basic rider maintenance to full engine and gearbox overhauls, suitable for professional mechanics and experienced DIY enthusiasts. 📊 Manual Specifications File Format File Format: PDF Print Quality Print Quality Expectation: High-resolution scans, typically black and white with clear diagrams. Printability is usually excellent. Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type Consideration: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, four-stroke, horizontally opposed twin-cylinder (Boxer) Displacement R80: 797.5 cc Displacement R100: 980 cc Bore X Stroke R80: 82.5 mm x 75 mm (typical) Bore X Stroke R100: 94 mm x 70.7 mm (typical) Compression Ratio: 8.2:1 to 9.5:1 (varies by specific model/year) Performance Horsepower R80: ~50 hp @ 6500 rpm (estimated) Horsepower R100: ~65 hp @ 7250 rpm (estimated) Torque R80: ~57 Nm @ 5000 rpm (estimated) Torque R100: ~70 Nm @ 5500 rpm (estimated) Fuel System Carburetor Type: Typically dual Bing constant-velocity carburetors (e.g., 32mm or 40mm depending on model) Fuel Type: Unleaded gasoline (premium recommended) Fuel Capacity: Approx. 19-21 liters (including reserve) 🔧 Transmission Standard Transmission Type: 5-speed manual constant mesh gearbox Optional Optional Transmission: N/A (all models were manual) Features Clutch Type: Single dry plate, hydraulically actuated Final Drive: Shaft drive with enclosed universal joint and final drive unit 📐 Dimensions Exterior Length: Approx. 2230 mm Width Handlebar: Approx. 850-900 mm Height Seat: Approx. 860-900 mm (unladen, varies by suspension setting) Weights Dry Weight R80: ~192 kg Dry Weight R100: ~195 kg Gross Vehicle Weight: Approx. 360-380 kg Payload Capacity: Approx. 170-180 kg 🛡️ Safety Features Ratings Safety Ratings: Not applicable in the modern sense; focus is on mechanical integrity and rider control. Active Features Active Safety Features: Effective dual disc front brakes, single disc rear brake, robust chassis, responsive steering. Passive Features Passive Safety Features: Sturdy frame construction, rider positioned for good visibility. 💡 Technology Features Infotainment Infotainment System: N/A (This era of motorcycle predates integrated infotainment systems. Focus is on mechanical and rider interaction). Driver Assistance Driver Assistance Features: N/A (No electronic rider aids beyond basic ABS on some later models, not typically 1987 models). Connectivity Connectivity Features: N/A 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 5,000 - 10,000 km or annually, depending on usage and manufacturer recommendations. Valve Clearance Interval: Every 10,000 km (critical for boxer engines) Spark Plug Replacement: Every 10,000 - 20,000 km Brake Fluid Change: Every 2 years Fluid Specifications Engine Oil Type: SAE 20W-50 or 10W-40 motorcycle specific oil, meeting API SG or higher. Engine Oil Capacity: Approx. 2.5 - 3.0 liters (including filter change) Transmission Oil Type: GL-5 SAE 80W-90 gear oil Final Drive Oil Type: GL-5 SAE 80W-90 gear oil Brake Fluid Type: DOT 4 Known Issues Known Issue 1:...