🏷️ Basic Information Identification Make: BMW Model: R 850 R Model Variant: R 850 GS Year: 1997 Codes Engine Code Prefix: R850 👋 Introduction Market Position Market Segment: Adventure Touring / Sport Touring Motorcycle Competitive Analysis Competitors 1997: Honda VFR750F, Kawasaki GTR1000, Yamaha TDM850 Key Features Engine Configuration: Two-cylinder boxer engine with single overhead camshaft (SOHC) per cylinder Suspension System: Telelever front suspension and Paralever rear shaft drive suspension for improved ride and handling Design Philosophy: Combines touring comfort with off-road capability, known for robust engineering and Boxer engine characteristics 📋 Manual Details Coverage Areas Coverage Scope: Comprehensive service and repair Page Count Estimated Page Count: Approximately 400-600 pages (typical for this era/scope) Manual Type Manual Type: Service Repair Workshop Manual Language Language: English Format Format: Likely PDF (Digital Download) or Printed Book 📖 Manual Coverage Systems Covered Engine Systems: Fuel injection, ignition, lubrication, cooling, exhaust, engine mechanical (disassembly/assembly of cylinder heads, pistons, crankshaft, etc.) Transmission Drivetrain: Gearbox (5-speed), clutch operation and adjustment, final drive (shaft drive), universal joints Chassis Suspension: Frame, front suspension (Telelever), rear suspension (Paralever), wheel bearings, steering system Braking System: Hydraulic brake systems (front and rear), ABS (if equipped), brake pad replacement, caliper service, master cylinder service Electrical System: Battery, charging system (alternator, regulator), starter motor, lighting (headlights, taillights, turn signals), instrumentation, wiring diagrams, fuses, relays, ignition coils Fuel System: Fuel tank, fuel pump, fuel injectors, fuel lines, fuel filter replacement Bodywork Trim: Fairing components, seat removal, body panel fasteners, tank removal Procedures Included Maintenance Procedures: Oil and filter changes, air filter replacement, spark plug inspection/replacement, valve clearance adjustment, drive shaft lubrication, brake fluid flush/bleed, coolant flush/refill Troubleshooting: Diagnostic flowcharts, fault finding for common issues (e.g., starting problems, running issues, electrical faults) Repair Procedures: Engine component overhaul, transmission repair, suspension component replacement, brake caliper overhaul, starter motor replacement, alternator testing Adjustment Procedures: Throttle cable adjustment, clutch lever adjustment, idle speed setting Technical Depth Diagnostics: Detailed diagnostic procedures, fault code interpretation (if applicable for the era), electrical system testing using multimeters Engine Rebuild: Complete engine disassembly, cleaning, inspection, measurement of wear limits, reassembly with torque specifications Electrical Schematics: Detailed and clear wiring diagrams for all electrical systems Special Tools: Listing of required special tools and their BMW part numbers for specific tasks 📊 Manual Specifications File Format File Format: PDF (Portable Document Format) Print Quality Print Quality: High-resolution scans suitable for printing, clear text and diagrams Binding Type Binding Type: N/A (for digital format); If printed: Perfect bound or spiral bound Paper Type Paper Type: N/A (for digital format); If printed: Durable, high-quality paper stock suitable for workshop use ⚙️ Engine Specifications Primary Engine Engine Type: Four-stroke, air-cooled, horizontally opposed boxer twin Displacement: 848 cc Bore X Stroke: 90.0 mm x 66.0 mm Compression Ratio: 9.0:1 Power Output Hp: 70 hp @ 7,500 rpm Torque Nm: 77 Nm @ 5,500 rpm Fuel System Fuel Delivery: Bosch Motronic MA 2.4 fuel injection system Fuel Type: Unleaded gasoline, minimum 91 octane (RON+MON)/2 Fuel Tank Capacity: 25 Liters Lubrication Oil Capacity: 3.0 Liters (with filter change) Recommended Oil Grade: SAE 15W-50 or 20W-50 API SG or higher 🔧 Transmission Standard Transmission Type: 5-speed manual gearbox Clutch Type: Single dry plate clutch, hydraulically actuated Features Drive Type: Shaft drive to rear wheel Final Drive Ratio: 3.00:1 (typically) 📐 Dimensions Exterior Length Mm: 2190 mm Width Mm: 930 mm (approx. handlebars) Height Mm: 1370 mm (approx. windshield) Weights Dry Weight Kg: 217 kg Gross Vehicle Weight Rating Kg: 420 kg Maximum Payload Kg: 203 kg 🛡️ Safety Features Ratings ABS: Optional (BMW Motorrad ABS II) Active Features Braking System Features: Dual 305 mm discs with 4-piston calipers (front), Single 276 mm disc with 2-piston caliper (rear) Lighting: Halogen headlight, LED taillight and indicators Passive Features Chassis Design: Steel tube frame providing rigidity and impact absorption 💡 Technology Features Infotainment Instrumentation: Analog tachometer and speedometer, odometer, trip meters, fuel gauge, warning lights (oil pressure, battery, ABS, neutral) Driver Assistance ABS System: BMW Motorrad ABS II (optional) – a two-channel system offering improved braking stability Connectivity Diagnostic Interface: Pre-OBD-II era, relies on specific BMW diagnostic tools or troubleshooting by component testing 🔧 Maintenance Service Intervals Oil Change Interval: Every 10,000 km or 12 months, whichever comes first Valve Adjustment Interval: Every 20,000 km Spark Plug Replacement Interval: Every 20,000 km (inspection and gap check) Fluid Specifications Brake Fluid Type: DOT 4 (DOT 4 LV for ABS II systems) Gearbox Oil Type: BMW Gear Oil (or equivalent GL-5, 75W-90 or 80W-90) Final Drive Oil Type: BMW Final Drive Oil (or equivalent GL-5, 80W-90) Coolant Type: BMW Coolant (or ethylene glycol-based antifreeze with corrosion inhibitors) Known Issues Common Wear Items: Clutch wear, ABS sensor issues (if equipped), fuel injector cleaning, drive shaft spline lubrication (critical for longevity) Potential Electrical Faults: Corrosion in wiring connectors, regulator/rectifier failures...