🏷️ Basic Information Identification Make: BMW Model: R850R Model Variant: R850R (R21) Product Type: Service & Repair Manual Codes Chassis Code: R21 👋 Introduction Market Position Positioning: The BMW R850R positioned as a versatile, mid-range touring and everyday motorcycle, offering a balance of performance, comfort, and BMW's renowned build quality. Competitive Analysis Competitors: Competed against other mid-weight naked and sport-touring motorcycles from brands like Ducati, Moto Guzzi, and Yamaha. Key Features Engine Configuration: Air/oil-cooled, four-stroke, boxer twin-cylinder engine. Drivetrain: Shaft drive, a hallmark of BMW Motorrad. Handling: Known for its stable handling and comfortable ride, often featuring the Telelever front suspension (though R850R typically used conventional telescopic forks). 📋 Manual Details Coverage Areas Primary Coverage: Comprehensive service, repair, troubleshooting, and diagnostics for the BMW R850R motorcycle. Secondary Coverage: Pre-delivery checks, service data, maintenance schedules, electrical systems, engine overhaul, transmission, chassis, and bodywork. Page Count Estimated Page Count: 400+ Manual Type Type: Factory Authorized Service Manual Language Language: English Format Format: Digital (PDF), Printable 📖 Manual Coverage Systems Covered Engine Mechanical: Detailed disassembly, inspection, repair, and reassembly of the boxer twin engine (cylinders, pistons, crankshaft, connecting rods, valve train). Fuel System: Bosch Motronic fuel injection system, throttle bodies, injectors, fuel pump, fuel filter, and associated sensors. Ignition System: Electronic ignition control, coil packs, spark plugs, and timing. Transmission: Gearbox overhaul, clutch service (dry single-plate), shaft drive system maintenance and repair. Electrical System: Wiring diagrams, lighting, battery, starter motor, alternator, fuses, relays, and instrument cluster diagnostics. Braking System: Front and rear brake systems (typically BMW EVO ABS), caliper service, disc inspection, brake fluid bleeding, and ABS system troubleshooting. Suspension Steering: Front fork (telescopic) maintenance and repair, rear monoshock suspension, steering head bearing adjustment and replacement. Chassis Bodywork: Frame inspection, body panel removal/installation, seat, fairing, and accessory mounting. Procedures Included Scheduled Maintenance: Detailed service intervals for oil changes, filter replacements, spark plugs, valve clearance checks, and fluid flushes. Troubleshooting: Systematic diagnostic procedures for common faults and error codes. Repair Techniques: Step-by-step instructions for component removal, repair, and reinstallation, including torque specifications. Diagnostics: Information on using diagnostic tools (where applicable) and interpreting sensor data. Special Tools: Identification of BMW specific tools required for certain procedures. Technical Depth Depth: In-depth technical information suitable for professional mechanics and experienced DIY enthusiasts, covering complete overhauls and complex diagnostics. 📊 Manual Specifications File Format Digital Format: PDF Print Quality Print Readability: High-resolution, clear text and diagrams suitable for printing. 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 Displacement: 848 cc Bore X Stroke: 90.0 mm x 66.0 mm Compression Ratio: 10.3:1 Valve Train: 2 valves per cylinder, OHV (Overhead Valve), pushrod actuated Performance Horsepower: 70 hp (51 kW) @ 7,500 rpm (approx.) Torque: 76 Nm (56 lb-ft) @ 5,500 rpm (approx.) Fuel System Fuel Delivery: Bosch Motronic MA 2.4 Electronic Fuel Injection Fuel Type: Unleaded gasoline, minimum 91 RON Lubrication Oil Type Spec: BMW recommends SAE 20W-50 or 15W-50 motorcycle-specific engine oil. Oil Capacity With Filter: Approx. 3.0 liters (3.2 US qt) 🔧 Transmission Standard Type: 5-speed manual gearbox Final Drive: Shaft drive Features Clutch Type: Dry, single-plate diaphragm spring clutch Gearbox Oil Spec: Refer to manual for specific gearbox oil type and viscosity (e.g., SAE 75W-90 GL-5 gear oil). 📐 Dimensions Exterior Length: 2,180 mm (85.8 in) Width Handlebar: 800 mm (31.5 in) Height Seat Unladen: 825 mm (32.5 in) Weights Dry Weight: 221 kg (487 lbs) Gross Vehicle Weight Rating: 440 kg (970 lbs) Fuel Tank Capacity: 25 liters (6.6 US gal) 🛡️ Safety Features Ratings ABS Availability: Optional BMW EVO ABS (Anti-lock Braking System) available on many models. Active Features Braking System Front: Dual 305 mm discs with 4-piston calipers Braking System Rear: Single 276 mm disc with 2-piston caliper Passive Features Frame Type: Tubular steel frame 💡 Technology Features Infotainment Display Type: Analog speedometer and tachometer, LCD odometer and trip meters. Optional heated grips. Driver Assistance ABS System: Optional BMW EVO ABS provides anti-lock functionality for enhanced braking safety. Connectivity Diagnostic Interface: BMW's proprietary diagnostic connector for engine management and ABS system diagnostics. 🔧 Maintenance Service Intervals Oil Change Interval: Every 10,000 km (6,000 miles) or annually, whichever comes first. Valve Clearance Check: Every 20,000 km (12,000 miles). Spark Plug Replacement: Every 20,000 km (12,000 miles). Brake Fluid Flush: Every 2 years. Fluid Specifications Transmission Oil Spec: Refer to manual; typically SAE 75W-90 GL-5. Brake Fluid Spec: DOT 4 Known Issues Common Wear Items: Clutch wear, rear shock absorber degradation, potential starter motor solenoid issues, and alternator output checks. Electrical Gremlins: While generally robust, older wiring harnesses can develop issues; proper diagnostic procedures are crucial. 📚 Vehicle History Brand Heritage Manufacturer: Bayerische Motoren Werke AG (BMW) Motorcycle Division: BMW Motorrad, known for pioneering boxer engines and shaft drive. Model...