🏷️ Basic Information Identification Make: BMW Model: R850R Model Variant: R850R (R21) Year Start: 1995 Year End: 2007 Codes Chassis Code: R21 👋 Introduction Market Position Motorcycle Segment: Touring/Sport-Touring Roadster Competitive Analysis Competitors: Moto Guzzi California, Honda ST1100 (higher displacement segment), Yamaha FJR1300 (higher displacement segment) Key Features Engine Layout: Horizontally opposed twin-cylinder Boxer engine Drive System: Shaft drive, providing low maintenance and smooth power delivery Handling: Renowned for its stable handling and comfortable ride characteristics Manual Value Proposition Target Audience: BMW R850R owners, independent motorcycle mechanics, DIY enthusiasts 📋 Manual Details Coverage Areas Manual Type: Service Repair Manual Language: English Format: Digital (PDF) Page Count Estimated Page Count: 300-500 📖 Manual Coverage Systems Covered Engine System: Complete overhaul, diagnostics, tuning, fuel injection, ignition, lubrication, cooling Transmission System: Clutch, gearbox internal and external components, final drive (shaft drive) Chassis And Frame: Frame inspection and repair, suspension (forks, shock absorbers), steering, wheels, tires Electrical System: Wiring diagrams, battery, charging system (alternator, regulator), ignition system, lighting, instrumentation, starter motor, ECU diagnostics Braking System: Hydraulic system, ABS (if equipped), brake calipers, master cylinders, brake lines, pads, discs Fuel System: Fuel tank, fuel pump, fuel lines, injectors, fuel pressure regulator, emissions control (if applicable) Body And Fairings: Body panel removal and installation, seat, fairings, luggage systems Procedures Included Preventative Maintenance: Oil changes, filter replacements, spark plug service, brake fluid flush, coolant flush, drive shaft lubrication, general inspection schedules Diagnostic Procedures: Troubleshooting common issues, fault code interpretation (if applicable), component testing Repair Procedures: Engine disassembly and reassembly, gearbox repair, suspension overhaul, electrical component replacement, brake caliper rebuild Installation Procedures: Accessory installation, aftermarket part fitment guidance (where applicable) Technical Depth Diagnostic Capability: Advanced diagnostics, ECU parameter checks, component testing using specified tools Rebuild Complexity: Comprehensive rebuild instructions for major components like the engine and transmission Torque Specifications: Detailed torque values for all critical fasteners Clearances And Tolerances: Precise measurements for component clearances and wear limits 📊 Manual Specifications File Format File Type: Portable Document Format (PDF) Searchability: Full text searchable PDF for quick information retrieval Print Quality Resolution: High resolution for clear text and diagrams Binding Type Binding: N/A (Digital Format) Paper Type Paper Quality: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Four-stroke, horizontally opposed twin-cylinder boxer engine Displacement: 848 cc (51.7 cu in) Bore X Stroke: 90.0 mm x 66.0 mm (3.54 in x 2.60 in) Compression Ratio: 10.3:1 Valve Train: 2 valves per cylinder, pushrod-actuated (OHV) Performance Horsepower: 70 hp (51 kW) at 7250 rpm (approximate, varies slightly by year/market) Torque: 75 Nm (55 lb-ft) at 6000 rpm (approximate, varies slightly by year/market) Fuel System Fuel Delivery: Bosch Motronic Electronic Fuel Injection (EFI) Fuel Type: Unleaded gasoline, minimum 91 octane (RON+MON)/2 Fuel Tank Capacity: 20 liters (5.3 US gal) Lubrication Oil Capacity: Approximately 2.5 liters (2.6 US qt) with filter change Recommended Oil Type: SAE 20W-50 API SG or higher (check manual for specific BMW recommendations) Cooling System Cooling Method: Air-cooled 🔧 Transmission Standard Transmission Type: 5-speed manual gearbox Clutch Type: Single dry plate, cable-actuated Features Final Drive: Shaft drive with universal joint and bevel gear Final Drive Oil: BMW Hypoid Gear Oil SAE 90 (or equivalent API GL-5) 📐 Dimensions Exterior Length: Approximately 2220 mm (87.4 in) Width: Approximately 900 mm (35.4 in) (over mirrors) Height: Approximately 1300 mm (51.2 in) (seat height varies) Weights Dry Weight: Approximately 212 kg (467 lbs) Gross Vehicle Weight Rating: Approximately 450 kg (992 lbs) Wheels And Tires Front Wheel Size: 3.50 x 17 Front Tire Size: 110/80 R17 (Tubeless) Rear Wheel Size: 4.50 x 17 Rear Tire Size: 140/80 R17 (Tubeless) Wheel Bolt Pattern: N/A (Cast Aluminum Wheels) 🛡️ Safety Features Ratings ABS Availability: Optional (BMW Integral ABS) Active Features Braking System: Dual front disc brakes, single rear disc brake Suspension Type: Telescopic front forks (35mm), Monolever rear swingarm with single shock absorber Passive Features Lighting: Halogen headlamp, LED taillight 💡 Technology Features Infotainment Audio System: Not typically factory-equipped; aftermarket integration common Driver Assistance ABS: Optional BMW Integral ABS system available on some models Connectivity Diagnostic Port: BMW proprietary diagnostic connector, requiring specific adapters for modern tools 🔧 Maintenance Service Intervals Oil Change Interval: Every 10,000 km (6,000 miles) or annually Spark Plug Replacement: Every 20,000 km (12,000 miles) or as specified Valve Clearance Check: Every 20,000 km (12,000 miles) Brake Fluid Change: Every 2 years Fluid Specifications Engine Oil Spec: SAE 20W-50 API SG or higher Brake Fluid Spec: DOT 4 Coolant Type: N/A (Air-cooled) Transmission Oil Spec: Refer to manual (typically SAE 75W-90 GL-5 for gearbox, Hypoid Gear Oil SAE 90 for final drive) Known Issues Common Wear Item: Clutch wear, rear shock absorber degradation, drive shaft spline wear Electrical Gremlins: Occasional issues with ABS sensors or general wiring integrity due to age Fuel System Maintenance: Periodic cleaning of fuel injectors...