This manual covers the R80GS and R100GS models from 1992, iconic dual-sport motorcycles renowned for their robust construction and capability in both adventure touring and off-road conditions. Building on a legacy of producing technically advanced and reliable machines, these models feature air-cooled boxer twin engines, shaft drive, and the distinctive Monolever rear suspension system on the R100GS. Their durable steel tube frames and well-engineered components have earned them a reputation for longevity and performance, making them highly sought after by riders who value dependability and versatility. This comprehensive workshop manual provides detailed service and repair instructions essential for maintaining the optimal performance and longevity of your R80GS or R100GS. It covers a wide array of systems, including the engine mechanicals, fuel system, transmission, electrical components, brakes, and suspension, with specific guidance on routine maintenance, troubleshooting, and component replacement. With step-by-step procedures, torque specifications, and detailed diagrams, this manual serves as an indispensable resource for owners, mechanics, and technicians to ensure their vehicle remains in excellent condition. 🏷️ Basic Information Identification Make: BMW Model: R80GS / R100GS Year: 1992 Codes Chassis Code R80Gs: 247E Chassis Code R100Gs: 247D 👋 Introduction Market Position Segment: Dual-sport / Adventure touring motorcycle segment Reputation: Iconic, robust, capable off-road and for long-distance travel Competitive Analysis Competitors: Honda Africa Twin (early models), Yamaha XT600, Suzuki DR650 Key Features Drivetrain: Shaft drive, Monolever rear suspension (R100GS) Engine Layout: Air-cooled boxer twin Frame: Steel tube frame 📋 Manual Details Coverage Areas Comprehensive Coverage: Full service and repair instructions Page Count Estimated Page Count: 300-500 Manual Type Type: Workshop Manual / Service Manual / Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Top-end, bottom-end, timing, valve adjustment, piston/ring replacement, crankshaft, connecting rods, oil pump, lubrication system Engine Fuel System: Carburetor overhaul (Bing 32/40/42), fuel delivery, fuel tank, fuel lines, fuel filter Transmission: Gearbox overhaul, clutch (single dry plate), shifting mechanisms, final drive unit (Monolever swingarm) Electrical System: Ignition system (CDI), starter motor, alternator, battery, lighting, wiring diagrams, instrumentation, switches Brakes: Hydraulic disc brakes (front and rear), master cylinders, calipers, brake lines, fluid replacement Suspension: Front telescopic forks (BMW Duolever for R100GS P/D, though R80GS is conventional), rear Monolever shock absorber/swingarm, adjustment, rebuild Chassis And Bodywork: Frame inspection, body panels, fairing (R100GS P/D), seat, fenders, wheel and tire service Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug replacement, air filter cleaning/replacement, brake adjustments, chain/drive shaft lubrication Troubleshooting: Diagnostic charts, common problems and solutions for engine, electrical, and mechanical systems Repair And Rebuild: Detailed step-by-step instructions for engine, transmission, suspension, and brake system overhauls Component Replacement: Instructions for replacing major components like pistons, valves, carburetors, clutch, shock absorbers, etc. Technical Depth Depth: Comprehensive, suitable for professional mechanics and experienced DIY enthusiasts Detail Level: Detailed diagrams, torque specifications, special tool requirements 📊 Manual Specifications File Format File Type: PDF Print Quality Quality: High resolution, clear text and legible diagrams Binding Type Binding: N/A (Digital Download) Paper Type Paper Quality: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine R80Gs Displacement: 797.5 cc R100Gs Displacement: 980 cc Engine Type: Air-cooled, four-stroke, boxer-twin cylinder Bore X Stroke R80Gs: 84.8 mm x 70.6 mm Bore X Stroke R100Gs: 94 mm x 70.6 mm Compression Ratio R80Gs: 8.2:1 Compression Ratio R100Gs: 8.4:1 Performance R80Gs Horsepower: 50 hp @ 6500 rpm (approx.) R100Gs Horsepower: 60 hp @ 6500 rpm (approx.) R80Gs Torque: 57 Nm @ 5000 rpm (approx.) R100Gs Torque: 70 Nm @ 4000 rpm (approx.) Fuel System Carburetors R80Gs: 2 x Bing 32/32/32mm constant-velocity carburetors Carburetors R100Gs: 2 x Bing 40mm constant-velocity carburetors Fuel Capacity: 26 liters (including 4-liter reserve) Fuel Type: Unleaded gasoline (91 RON or higher recommended) 🔧 Transmission Standard Type: 5-speed manual gearbox Drive Type: Shaft drive to rear wheel Features Clutch: Single dry plate clutch, hydraulically actuated Final Drive: BMW Monolever system (single-sided swingarm with integrated final drive) 📐 Dimensions Exterior Length R100Gs Approx: 2210 mm Width R100Gs Approx: 880 mm Height R100Gs Approx: 1300 mm Weights Dry Weight R80Gs Approx: 198 kg Dry Weight R100Gs Approx: 204 kg Wet Weight R100Gs Approx: 228 kg Gross Vehicle Weight Rating Approx: 380 kg 🛡️ Safety Features Ratings Safety Standards: Adherence to 1990s European motorcycle safety regulations Active Features Braking System: Dual hydraulic disc brakes (front and rear) offering strong stopping power Suspension Stability: Well-engineered suspension provides stability during braking and cornering Passive Features Frame Integrity: Robust steel tube frame contributes to structural rigidity Lighting: Adequate headlight, taillight, and indicator lighting for visibility 💡 Technology Features Infotainment Infotainment System: None (basic instrumentation only) Driver Assistance Driver Assistance Features: None Connectivity Connectivity Features: None Instrumentation Dashboard Layout: Analog speedometer, tachometer, odometer, trip meter, warning lights (oil pressure, neutral, turn signals, high beam) 🔧 Maintenance Service Intervals Oil Change Interval: Every 5,000 - 10,000 km or annually, depending...