🏷️ Basic Information Identification Make: BMW Model: R80 GS / R100 GS Model Year: 1986 Codes Chassis Codes: 247 (R80 GS), 248 (R100 GS) Engine Codes: 117EG (R80 GS), 102EF (R100 GS) 👋 Introduction Market Position Segment: Dual-sport motorcycle Positioning: The R80GS and R100GS were pioneering models in the adventure touring segment, offering robust performance and off-road capability. Competitive Analysis Competitors 1986: Honda Transalp, Yamaha Tenere, Suzuki DR650/750S. Key Features Engine Type: Air-cooled boxer twin-cylinder Drivetrain Gs Specific: Paralever single-sided swingarm with shaft drive (introduced on GS models for reduced torque reaction). Suspension Gs Specific: Long-travel suspension for off-road capability. Fuel Delivery: Dual Bing carburetors. 📋 Manual Details Coverage Areas Topic Coverage: Full service and repair instructions Page Count Estimated Pages: 300+ Manual Type Type: Service Repair Workshop Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Detailed diagrams, disassembly, assembly, tuning, troubleshooting for both R80 and R100 boxer engines. Transmission: Gearbox maintenance, repair, overhaul, troubleshooting, lubrication. Drivetrain: Final drive (Paralever system), driveshaft, universal joints, clutch maintenance and repair. Suspension: Front forks (including telescopic fork maintenance, seal replacement), rear shock absorber (monoshock for GS models), Paralever rear suspension system adjustments and rebuild. Brakes: Front and rear brake systems (disc brakes), caliper maintenance, master cylinder rebuild, fluid replacement, bleeding procedures. Electrical System: Ignition system, charging system (alternator, voltage regulator), lighting, starter motor, battery, wiring diagrams, troubleshooting electrical faults. Fuel System: Carburetor service and tuning (Bing carburetors), fuel tank maintenance, fuel lines, fuel pump (if applicable). Cooling System: Oil cooling system maintenance (oil cooler, lines). Exhaust System: Exhaust manifold, muffler inspection and replacement. Frame And Bodywork: Frame inspection, fairing, seat, fuel tank removal and installation, fenders, luggage rack mounting. Procedures Included Maintenance: Routine servicing, oil changes, filter replacements, spark plug checks, valve adjustments, brake fluid changes, chain adjustment (if applicable). Troubleshooting: Systematic diagnostic procedures for common and uncommon issues, fault finding charts. Repair: Step-by-step instructions for component removal, disassembly, repair, reassembly, and installation. Overhaul: Complete engine rebuild, gearbox overhaul, suspension component refurbishment. Adjustments: Carburetor synchronization, idle speed adjustment, ignition timing, suspension sag. Specifications Torque: Torque specifications for all critical fasteners. Technical Depth Depth: Comprehensive, covering everything from basic checks to full engine and transmission rebuilds, suitable for professional mechanics and experienced DIY enthusiasts. 📊 Manual Specifications File Format File Type: PDF Searchable Text: Likely searchable text within PDF for efficient information retrieval. Print Quality Quality: Digital reproduction of original factory documentation, ensuring clarity of text and diagrams. 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: 80.0 mm x 78.0 mm Bore X Stroke R100: 94.0 mm x 70.7 mm Displacement R80: 797.5 cc Displacement R100: 980 cc Compression Ratio R80: 8.2:1 Compression Ratio R100: 8.5:1 Performance Horsepower R80: 50 HP @ 6500 rpm Horsepower R100: 65 HP @ 7250 rpm Torque R80: 57 Nm @ 4000 rpm Torque R100: 70 Nm @ 6000 rpm Fuel System Carburetor Type: 2 x Bing 32mm CV (Constant Velocity) carburetors Fuel Type: Unleaded gasoline (premium) Valve Train Valve Actuation: Overhead valves (OHV), pushrod actuated Valve Clearance Spec Intake: 0.10 mm - 0.20 mm (cold) Valve Clearance Spec Exhaust: 0.20 mm - 0.30 mm (cold) 🔧 Transmission Standard Type: 5-speed manual gearbox Final Drive: Shaft drive via Paralever system Features Clutch Type: Dry, single plate, diaphragm spring clutch Gearbox Oil Spec: SAE 75W/90 API GL-5 gear oil Final Drive Oil Spec: SAE 75W/90 API GL-5 gear oil 📐 Dimensions Exterior Length Approx: 2200 mm Width Approx: 800 mm Height Approx: 1350 mm Weights Dry Weight R80: 197 kg Dry Weight R100: 207 kg Gross Vehicle Weight Rating Approx: 385 kg Cargo Fuel Tank Capacity: 26 Liters (including 4-liter reserve) 🛡️ Safety Features Ratings Safety Certification: N/A (Motorcycle, certification standards vary by region). Active Features Braking System: Dual front disc brakes, single rear disc brake (typically Brembo or ATE). Lighting: Halogen headlight, integrated taillight/brake light, turn signals. Passive Features Chassis Design: Steel tube frame for durability. 💡 Technology Features Infotainment Infotainment System: N/A (No integrated infotainment system; basic analogue instrumentation). Driver Assistance Assistance Features: N/A (Basic motorcycle design, no electronic rider aids). Connectivity Connectivity Features: N/A 🔧 Maintenance Service Intervals Oil Change Interval: Every 10,000 km or annually, whichever comes first. Valve Adjustment Interval: Every 10,000 km. Spark Plug Check Interval: Every 10,000 km. Brake Fluid Change Interval: Every 2 years. Fluid Specifications Engine Oil Type: API SG or higher, SAE 20W-40 motorcycle specific oil (or as per manual: SAE 20W-50 or 10W-40 depending on climate). Engine Oil Capacity: Approx. 2.5 Liters (without filter change) / 3.0 Liters (with filter change) Brake Fluid Type: DOT 4 Known Issues Clutch Lever Play: Excessive clutch lever play can indicate worn clutch plates or cable adjustment issues. Paralever...