🏷️ Basic Information Identification Make: BMW Model: R850R / R850C Model Year: 2004 Vehicle Type: Motorcycle Sub Model: R850R (Standard Roadster), R850C (Cruiser) 👋 Introduction Market Position Market Segment: Mid-size touring/cruiser motorcycle segment, known for BMW's engineering and reliability. Competitive Analysis Competitors: Honda Shadow series, Yamaha V-Star series, Kawasaki Vulcan series, Harley-Davidson Sportster (in terms of cruiser styling). Key Features Model Strengths: Torquey boxer-twin engine, comfortable riding position, shaft drive (low maintenance), BMW build quality, ABS availability. 📋 Manual Details Coverage Areas Primary Coverage: Service, Repair, Maintenance, Troubleshooting, Diagnostics Page Count Estimated Page Count: 400+ Manual Type Manual Type: Workshop Service Repair Manual Language Language: English Format Format: Digital (likely PDF) 📖 Manual Coverage Systems Covered Engine Mechanical: Engine disassembly, assembly, overhaul, cylinder head, valves, pistons, crankshaft, camshaft, timing, lubrication system, cooling system (air-cooled with oil cooling). Fuel System: Fuel injection system (throttle body, injectors, fuel pump, fuel pressure regulator, sensors), fuel tank, fuel lines, emission controls. Ignition System: Ignition coils, spark plugs, crankshaft position sensor, ignition control module. Transmission: Clutch operation, gearshift mechanism, gearbox disassembly and assembly, lubrication. Drivetrain: Final drive (bevel gear housing), driveshaft, universal joints, rear wheel hub. Suspension: Front fork (telescopic, potentially with adjustable preload/damping for some variants), rear swingarm, shock absorber(s), linkage (if applicable). Braking System: Front and rear brake calipers, brake discs, master cylinders, brake lines, ABS (if equipped), brake fluid. Electrical System: Battery, charging system (alternator/generator, voltage regulator), starter motor, lighting (headlight, taillight, turn signals), horn, wiring diagrams, fuses, relays, ECU/control units. Chassis Bodywork: Frame, subframe, body panels, seat, fuel tank mounting, handlebars, controls, exhaust system. Procedures Included Routine Maintenance: Oil and filter changes, air filter replacement, spark plug checks/replacement, brake fluid flush, coolant checks (if applicable), chain/shaft drive lubrication and adjustment. Troubleshooting: Diagnostic procedures for common issues, fault code interpretation (if OBD system present), electrical system troubleshooting, engine performance issues. Major Repairs: Engine rebuilds, transmission overhauls, suspension fork rebuilds, brake system repairs, electrical component replacement. Technical Specifications: Torque values for fasteners, engine clearances, fluid capacities, electrical system specifications, dimensional data. Technical Depth Depth Of Coverage: Comprehensive, covering from basic rider maintenance to complete engine and transmission rebuilds. Designed for professional mechanics and skilled DIY enthusiasts. 📊 Manual Specifications File Format File Format Details: Likely PDF with searchable text, high-resolution diagrams, and clear instructions. Print Quality Print Quality Expectation: High-quality reproductions of original factory diagrams and text. Binding Type Binding Type: N/A (Digital Format) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, four-stroke, boxer-twin (flat-twin) Displacement: 848 cc (850cc class) Bore X Stroke: 90.0 mm x 66.0 mm Compression Ratio: 10.0:1 Valve Train: SOHC, 2 valves per cylinder Power Output: Approximately 65 hp (48 kW) @ 6750 rpm (specifications may vary slightly by market/region) Torque Output: Approximately 76 Nm (56 lb-ft) @ 5500 rpm (specifications may vary slightly by market/region) Fuel System Fuel Delivery: Electronic Fuel Injection (Bosch Motronic MA 2.4 variant likely) Fuel Type: Unleaded gasoline, minimum 91 RON (87 AKI) Fuel Tank Capacity: Approximately 20 liters (5.3 US gal) 🔧 Transmission Standard Transmission Type: 5-speed manual Optional Optional Transmission: N/A for this model year Features Clutch Type: Single dry plate clutch, operated by cable Final Drive: Shaft drive with enclosed driveshaft and bevel gear housing 📐 Dimensions Exterior Length: Varies by model (R850R vs. R850C), approx. 2230 mm (R850R) Width: Varies by model, approx. 800 mm (R850R) Height: Varies by model, approx. 1250 mm (R850R) Weights Dry Weight: Approximately 214 kg (472 lbs) for R850R Wet Weight: Approximately 230 kg (507 lbs) for R850R (with fluids) 🛡️ Safety Features Ratings Safety Standards: Complies with relevant EU and US motorcycle safety regulations of the era. Active Features ABS: Optional BMW Motorrad Integral ABS (Anti-lock Braking System) available on some models. Braking Performance: Dual disc front brakes, single disc rear brake, typically with braided stainless steel lines for improved feel and durability. Passive Features Lighting: Halogen headlight, LED taillight and indicators (common for BMW of this era), good visibility. Chassis Design: Steel tube frame provides rigidity and stability. 💡 Technology Features Infotainment Infotainment System: Not applicable for this model. Focus is on core motorcycle functionality and rider engagement. Driver Assistance ABS Availability: Optional BMW Motorrad Integral ABS. Connectivity Connectivity Features: No integrated smartphone connectivity or advanced rider aids beyond ABS. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 10,000 km (6,000 miles) or annually, whichever comes first. Major Service Interval: Valve adjustment and other checks usually around 20,000 km (12,000 miles). Fluid Specifications Engine Oil Type: API SG/SH/SJ or higher, SAE 20W-40 or 20W-50. BMW recommends specific motorcycle-specific oils. Engine Oil Capacity: Approximately 3.0 liters (3.2 US quarts) with filter change. Transmission Oil Type: SAE 80W-90 API GL-5 gear oil. Transmission Oil Capacity: Approximately 0.3 liters (0.32 US quarts). Final Drive Oil Type: SAE 80W-90...