This manual provides comprehensive guidance for the R80GS and R100GS models, produced in 1982. These iconic dual-sport motorcycles, powered by the renowned Airhead Boxer engine family, defined the adventure touring segment with their robust build and versatile capabilities for both terrain and street. Known for their exceptional engineering quality and reliability, these motorcycles have earned a reputation for durability and longevity, making them a cherished choice for riders seeking adventure. This workshop manual is designed to be an indispensable resource for owners and technicians. It covers all essential aspects of service, repair, and maintenance, including detailed procedures for engine overhauls, fuel and ignition systems, transmission, brakes, suspension, and the electrical system. With comprehensive troubleshooting guides, diagnostic information, and precise technical specifications, this manual ensures that the R80GS and R100GS can be maintained to the highest standards, preserving their performance and extending their operational life. 🏷️ Basic Information Identification Make: BMW Model: R80GS / R100GS Year: 1982 Codes Engine Family: Airhead Boxer Model Codes: R80GS (Type 247E), R100GS (Type 247G) 👋 Introduction Market Position Segment: Adventure Touring Motorcycle Target Audience: Owners and mechanics seeking detailed repair and maintenance information for BMW R80GS and R100GS models Competitive Analysis Competitors: Honda Transalp, Yamaha Tenere, Suzuki DR-Z/DR BIG series (though the R80/R100GS pioneered the segment) Key Features Vehicle Type: Dual-sport motorcycle with robust build and off-road capability Manual Value: Essential for maintaining the longevity and performance of these classic BMW motorcycles 📋 Manual Details Coverage Areas Primary Coverage: Service, Repair, Workshop Secondary Coverage: Maintenance, Troubleshooting, Diagnostics Page Count Estimated Page Count: 300-400 Manual Type Type: Workshop Manual / Service Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Full overhaul, cylinder head, piston, crankshaft, camshaft, timing chain, oil pump, lubrication system Fuel System: Carburetor (Bing) disassembly, adjustment, cleaning; fuel tank, fuel lines, fuel pump (if applicable) Ignition System: Ignition timing, points, condenser, spark plugs, ignition coils, electronic ignition systems (if applicable for later revisions/models covered within the year range) Transmission Gearbox: Gearbox disassembly, assembly, gear selection, clutch operation, drive shaft, final drive Electrical System: Wiring diagrams, lighting, charging system (alternator, regulator), starter motor, battery, instrumentation, fuses Brakes: Front disc brake system (caliper, master cylinder, fluid), rear drum brake system, brake lines, adjustments Suspension: Front telescopic forks (oil change, seal replacement, spring preload), rear monolever (or twin shock for early R80), shock absorber adjustment Chassis Frame: Frame inspection, steering head bearings, wheel bearings, swingarm pivot Bodywork Trim: Fairing (if applicable), fuel tank removal, seat, fenders, luggage racks Procedures Included Routine Maintenance: Oil changes, filter replacement, spark plug checks, air filter cleaning, chain adjustment (if applicable for pre-Monolever models), brake fluid changes Troubleshooting: Systematic fault diagnosis for engine, electrical, and mechanical issues Repair Rebuild: Detailed step-by-step instructions for component disassembly, repair, and reassembly Diagnostics: Component testing, measurement specifications, wiring checks Adjustments: Valve clearance, carburetor synchronization, idle speed, clutch cable, brake lever free play Technical Depth Depth: Comprehensive (covers everything from basic maintenance to full engine/gearbox rebuilds) Detail Level: Mechanic-grade, with torque specifications, clearances, and schematics 📊 Manual Specifications File Format File Type: PDF Searchability: Likely text-searchable (depending on PDF origin) Print Quality Quality: Digital reproduction of original factory manual, quality varies but generally clear Binding Type Binding: N/A (Digital PDF) Paper Type Paper: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Type: Air-cooled, four-stroke, boxer-twin cylinder Bore X Stroke R80: 82.0 mm x 74.6 mm Bore X Stroke R100: 94.0 mm x 70.5 mm Displacement R80: 797.5 cc Displacement R100: 979.7 cc Performance Horsepower R80: Approx. 50 hp @ 6200 rpm Horsepower R100: Approx. 65 hp @ 7250 rpm Torque R80: Approx. 56 Nm (41 lb-ft) @ 4700 rpm Torque R100: Approx. 77 Nm (57 lb-ft) @ 5700 rpm Fuel System Carburetors: 2 x Bing 32/36/32/40/40/42mm (depending on specific model variant and year) Fuel Type: Unleaded gasoline Lubrication Oil Type Specification: API SG or higher, SAE 20W-50 recommended (check specific manual for variations) Oil Capacity: Approx. 2.5 liters (2.6 quarts) 🔧 Transmission Standard Type: 5-speed constant mesh Drive: Shaft drive Features Clutch: Single dry plate, diaphragm spring Gearbox Oil Type: GL-5 SAE 90 gear oil Gear Ratios Typical Ratios: 1st: 3.46, 2nd: 2.42, 3rd: 1.78, 4th: 1.40, 5th: 1.17 (exact ratios vary slightly by model) 📐 Dimensions Exterior Wheelbase: Approx. 1460 mm (57.5 inches) Length: Approx. 2180 mm (85.8 inches) Weights Dry Weight R80: Approx. 198 kg (436.5 lbs) Dry Weight R100: Approx. 205 kg (452 lbs) Fuel Tank Capacity: 26 liters (6.9 gallons) including reserve 🛡️ Safety Features Ratings Safety Standards: Industry standard for the era, focused on mechanical integrity and rider control Active Features Braking: Front hydraulic disc, rear drum brake, designed for predictable stopping power Suspension: Stable chassis and adjustable suspension contribute to rider control Passive Features Lighting: Halogen headlight, tail light, brake light, turn signals 💡...