🏷️ Basic Information Identification Make: BMW Model: R90 Year: 1982 Segment: Motorcycle (Touring) Codes Chassis Code: R90/6 Engine Code: M247 👋 Introduction Market Position Market Position: The BMW R90 series, particularly the R90/6, represented BMW's push into the larger displacement motorcycle market, offering a blend of touring comfort and robust performance, often appealing to riders seeking reliable long-distance capabilities with a distinct boxer-twin character. Competitive Analysis Competitive Analysis: Competed against other European and Japanese touring motorcycles of the era, differentiating itself through its shaft drive, boxer engine configuration, and reputation for build quality and durability. Key rivals included models from Moto Guzzi, Kawasaki, and Honda in the touring segment. Key Features Key Features: Iconic boxer-twin engine, shaft drive for low maintenance, comfortable riding position, excellent touring range, robust construction. 📋 Manual Details Coverage Areas Coverage Areas: Engine, Transmission, Chassis, Electrical System, Bodywork, Troubleshooting, Maintenance, Repair, Overhaul, Restoration Page Count Page Count: Approx. 500+ Manual Type Manual Type: Full Service & Repair Manual Language Language: English Format Format: Digital (PDF) Completeness Completeness: Comprehensive, covering all aspects of repair, maintenance, and restoration for the specified model year and variants. 📖 Manual Coverage Systems Covered Engine: Complete overhaul, carburetor adjustment, ignition system, valve adjustment, cooling system (air-cooled), lubrication system Transmission: Gearbox disassembly and reassembly, clutch service, driveline maintenance, final drive servicing Chassis: Front fork and suspension, rear shock absorbers, swingarm, steering head bearings, wheel bearings, brake system (drum and disc), frame inspection and repair Electrical System: Wiring diagrams, lighting system, ignition system, charging system (alternator/generator), starter motor, battery maintenance, instrument cluster diagnostics Bodywork And Trim: Fuel tank removal and installation, seat, fenders, fairings (if applicable), trim components Fuel System: Fuel tank maintenance, fuel lines, fuel filters, carburetor removal, cleaning, and tuning. Procedures Included Maintenance: Oil changes, filter replacements, spark plug servicing, chain adjustment, tire pressure checks, brake pad inspection Troubleshooting: Diagnostic charts for common starting, running, and electrical issues Repair: Step-by-step instructions for component repair and replacement Rebuild Refurbish Restore: Detailed instructions for complete engine and gearbox rebuilds, frame straightening, and component refurbishment Diagnostic Procedures: Includes detailed troubleshooting sections with flowcharts and symptom-based diagnostic guidance for common problems. Electrical Troubleshooting: Specific procedures for diagnosing and repairing issues within the electrical system, including ignition, charging, and lighting circuits, supported by detailed wiring diagrams. Technical Depth Technical Depth: Comprehensive (from basic maintenance to full engine and transmission rebuilds, including electrical troubleshooting and chassis overhaul) 📊 Manual Specifications File Format File Format: Searchable PDF, Optimized for Printing Searchability: Full text search capability, allowing quick access to specific topics and keywords. Print Quality Print Quality: High-resolution scans of original documentation, clear diagrams and illustrations Binding Type Binding Type: N/A (Digital) Paper Type Paper Type: N/A (Digital) ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, four-stroke, horizontally opposed twin-cylinder (Boxer) Displacement: 897.7 cc (54.77 cu in) Bore X Stroke: 90 mm x 70.6 mm Compression Ratio: 9.5:1 Valve Train: OHV, 2 valves per cylinder Cylinder Head Design: Overhead Valve (OHV) with pushrods and rocker arms Performance Horsepower: 60 hp @ 6,500 rpm Torque: 71 Nm (52 lb-ft) @ 5,000 rpm Fuel System Carburetion: 2 x Bing 32/40/333 or 32/40/334 constant-velocity carburetors Fuel Type: Unleaded gasoline, minimum 91 octane Lubrication System Oil Capacity: 2.5 liters (2.6 US qt) Oil Type: SAE 20W-50 API SF or SG rated motor oil 🔧 Transmission Standard Transmission Type: 5-speed manual, constant mesh Clutch: Dry, single plate, hydraulically operated Final Drive: Shaft drive, enclosed bevel gear Features Gear Ratios: Available in manual with various ratios (specific ratios to be confirmed via manual) Transmission Oil Type: SAE 80W-90 API GL-5 gear oil 📐 Dimensions Exterior Length: Approx. 2,220 mm (87.4 in) Width: Approx. 800 mm (31.5 in) at handlebars Height: Approx. 1,280 mm (50.4 in) at seat height Wheelbase: Approx. 1,465 mm (57.7 in) Ground Clearance: Approx. 140 mm (5.5 in) Weights Dry Weight: Approx. 220 kg (485 lbs) Gross Vehicle Weight Rating: Approx. 420 kg (926 lbs) Fuel Capacity: 24 liters (6.3 US gal), including 3.5 liter reserve 🛡️ Safety Features Ratings Safety Ratings: N/A (Motorcycle safety is assessed differently than cars; relies on rider skill and design integrity) Active Features Braking System: Front: Single Disc Brake (approx. 280mm), Rear: Drum Brake. Models might vary with dual discs on some later R90/6 variants, consult manual for specific configuration. Suspension Front: Telescopic forks with hydraulic damping Suspension Rear: Swingarm with twin shock absorbers, adjustable preload Passive Features Lighting: Halogen headlamp, taillight, turn signals Frame Construction: Steel duplex cradle frame 💡 Technology Features Infotainment Infotainment System: N/A (Analog instrumentation: speedometer, tachometer, odometer, trip meter, basic warning lights) 🔧 Maintenance Service Intervals Oil Change Interval: Every 5,000 km (3,000 miles) or annually, whichever comes first Filter Change Interval: With every oil change (internal oil screen) Valve Adjustment Interval: Every 10,000 km (6,000 miles) Spark Plug Replacement: Every...