The BMW R 850 GS is a dual-sport motorcycle renowned for its robust build quality, torquey boxer twin engine, and exceptional touring capabilities. Produced between 1999 and 2001, this model, part of BMW's esteemed R Series, offers a balanced blend of performance and practicality, making it suitable for both on-road travel and light off-road excursions. Its signature shaft drive ensures low maintenance, while the comfortable ergonomics are designed for long-distance riding. The R 850 GS stands out with its characteristic German engineering, providing a reliable and versatile platform for adventure and everyday use. This comprehensive service and repair manual is designed to guide owners and technicians through the maintenance, troubleshooting, and repair of the BMW R 850 GS. It covers all essential systems, including the engine, transmission, brakes, electrical system, and chassis, providing detailed step-by-step instructions, torque specifications, and clear diagrams. The manual's extensive content ensures that users can effectively perform routine maintenance, diagnose and resolve common issues, and undertake major repairs, thereby maximizing the longevity and performance of their motorcycle. 🏷️ Basic Information Identification Make: BMW Model: R 850 GS Model Designation: R850GS Family: R Series Type: Dual-Sport Motorcycle Product Type: Service Repair Manual Product Name: BMW R 850 GS 1999-2001 Service Repair Manual Codes Chassis Code Range: 259 👋 Introduction Market Position Segment: Adventure Touring / Dual-Sport Motorcycle Target Audience: Owners and independent workshops seeking to perform maintenance and repairs on the BMW R 850 GS. Competitive Analysis Competitors: Honda Africa Twin (older generations), Yamaha Ténéré, Suzuki V-Strom (earlier models), Kawasaki KLR. Differentiation: BMW's signature boxer twin engine, shaft drive, robust build quality, and touring capabilities differentiate it. Key Features Vehicle Highlights: Torquey boxer twin engine, shaft drive for low maintenance, comfortable ergonomics for long-distance travel, capable on varied terrain. Manual Benefit: Empowers owners to maintain their motorcycle, saving on dealership costs and ensuring proper upkeep for longevity. 📋 Manual Details Coverage Areas Years Covered: 1999, 2000, 2001 Engine Variants Covered: 848cc (R850GS) Page Count Estimated Page Count: Extensive (specific count not provided, but described as comprehensive) Manual Type Manual Type: Service and Repair Manual Content Focus: Maintenance, troubleshooting, repair, and diagnostics Language Language: English Format Format: Digital (likely PDF, inferred from typical sales of such manuals) Format Details: Searchable text, printable pages 📖 Manual Coverage Systems Covered Engine: Complete overhaul, internal components, lubrication, cooling, fuel injection, ignition, exhaust Transmission: Gearbox service, clutch operation, final drive (Paralever system), lubrication Chassis And Suspension: Frame inspection, front fork (Telelever or traditional depending on specific R850GS model variant if any, though R850GS typically uses conventional forks), rear monoshock, Paralever rear suspension Brakes: Hydraulic brake system (front and rear), ABS (if equipped), brake pad replacement, caliper service, brake fluid flush Electrical System: Battery, charging system (alternator/stator, regulator/rectifier), starter motor, lighting (headlight, taillight, indicators), instrumentation, wiring diagrams, fuses, relays Fuel System: Fuel tank, fuel pump, fuel filter, fuel injectors, throttle body, idle control Bodywork And Trim: Fairing removal and installation, seat, fuel tank cover, fenders, luggage systems (if applicable) Wheels And Tires: Wheel bearing service, tire replacement, wheel balancing, spoke tensioning (if applicable) Procedures Included Maintenance: Oil change, filter replacement, spark plug service, air filter cleaning/replacement, brake fluid change, coolant flush (if liquid-cooled variant), valve clearance adjustment, drive shaft lubrication Troubleshooting: Diagnostic procedures for common faults, fault codes (if applicable), symptom-based troubleshooting guides Repair: Component removal, disassembly, inspection, repair, and reassembly for all major systems Diagnostics: Engine performance analysis, electrical system checks, ABS diagnostics (if equipped) Calibration And Adjustment: Throttle position sensor (TPS) adjustment, idle speed adjustment, ignition timing checks (if adjustable) Technical Depth Depth: Comprehensive from basic owner maintenance to advanced mechanical and electrical repairs, including full engine and transmission rebuilds. Detail Level: Step-by-step instructions, torque specifications, wiring diagrams, exploded views, diagnostic flowcharts. 📊 Manual Specifications File Format File Type: PDF (Portable Document Format) Searchability: Full text searchable for quick information retrieval. Printability: Printable pages for workshop use. Print Quality Visuals: High-resolution images, clear diagrams, and exploded views. Binding Type Binding: N/A (Digital Format) Paper Type Paper: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Air/Oil-cooled, four-stroke, boxer-twin cylinder Displacement: 848 cc (cubic centimeters) Bore X Stroke: 87.4 mm x 70.5 mm Compression Ratio: 10.0:1 Valve Train: Two valves per cylinder, pushrod actuated with rockers Performance Horsepower: Approx. 70 hp (52 kW) at 6,750 rpm (European spec) Torque: Approx. 55 lb-ft (75 Nm) at 5,250 rpm (European spec) Fuel System Fuel Delivery: Bosch Motronic MA 2.4 Fuel Injection (Multi-point injection) Fuel Type: Unleaded gasoline, minimum 91 RON (87 AKI) Fuel Tank Capacity: Approx. 25 liters (6.6 US gallons) Lubrication Oil Type: API SG or higher, SAE 20W-50 motorcycle specific oil recommended (check manual for precise BMW recommendation) Oil Capacity With Filter: Approx. 3.0 liters (3.2 US quarts) Ignition Ignition System: Electronic ignition (Digital) Exhaust Exhaust System: Two into one catalytic...