🏷️ Basic Information Identification Make: BMW Model: R Series (R80, R90, R100) Model Variants: R80/7, R80RT, R80G/S, R80ST, R90/6, R90S, R100/7, R100S, R100CS, R100RT, R100RS, R100GS, R100R, R100GS PD Production Years: 1978-1996 Codes Engine Code General: Type 247 (Airhead Boxer Engine) 👋 Introduction Market Position Motorcycle Segment: Heritage Boxer Twin, Touring, Sport Touring, Dual-Sport Target Audience: Owners of BMW R80, R90, and R100 series motorcycles seeking to perform their own maintenance and repairs, restorers, and enthusiasts. Competitive Analysis Competitors Era: Moto Guzzi V-twins, Honda CB series, Kawasaki Z series, Yamaha XS series, Ducati Bevel-Drive twins. Key Features Vehicle Engine Layout: Air-cooled, horizontally-opposed twin-cylinder (Boxer) engine Drivetrain: Shaft drive, leading to low maintenance and clean aesthetic. Handling: Known for stable and predictable handling characteristics, particularly the 'monolever' and 'paralever' rear suspension models. Key Features Manual Comprehensiveness: Covers a wide range of model years and variations within the R80, R90, and R100 families. Technical Accuracy: Based on factory service data, ensuring accurate repair procedures and specifications. 📋 Manual Details Coverage Areas Market Coverage: Global (primarily focusing on models sold in North America and Europe) Language: English Page Count Estimated Page Count: Comprehensive (often exceeding 500 pages for full coverage) Manual Type Manual Type: Factory Service/Workshop/Repair Manual Format Format: Digital Download (PDF) Accessibility: Instant Download Licensing: No Expiry Dates 📖 Manual Coverage Systems Covered Engine Mechanical: Complete teardown, assembly, inspection, and repair of all internal engine components (pistons, rings, cylinders, crankshaft, camshaft, valves, timing chain/gears, lubrication system). Engine Fuel System: Carburetor (Bing) tuning, overhaul, jetting, float adjustment, fuel pump, fuel lines, fuel tank inspection and cleaning. Engine Ignition System: Ignition timing, points and condenser (if applicable), electronic ignition systems (Motoplat, Boyer Bransden, etc.), spark plugs, coils, high-tension leads. Transmission: Gearbox disassembly, assembly, inspection, gear selection, clutch operation (single plate dry clutch, dual plate wet clutch on some models), transmission fluid changes, troubleshooting. Drivetrain: Shaft drive system inspection, universal joint maintenance, final drive unit service, gear ratio information. Brakes: Hydraulic brake system servicing (master cylinders, calipers, brake lines, fluid flush and bleed), brake pad inspection and replacement, drum brake adjustment (rear on some models), parking brake system. Suspension: Front fork servicing (oil changes, seal replacement, spring inspection), rear shock absorber service and adjustment, swingarm and pivot bearing maintenance. Electrical System: Wiring diagrams, component testing (alternator, starter motor, battery, lighting, horn, instrumentation), fuse box layout, troubleshooting electrical faults. Chassis And Frame: Frame inspection, steering head bearing maintenance and adjustment, wheel bearing service, sidestand and centerstand service. Bodywork And Fairings: Body panel removal and installation, seat maintenance, fuel tank removal, fairing component repair and replacement (where applicable). Procedures Included Routine Maintenance: Oil changes, filter replacement, spark plug replacement, chain adjustment (if applicable, though most are shaft drive), lubrication points, tire pressure checks. Troubleshooting: Diagnostic flowcharts and common problem identification for engine, electrical, and mechanical systems. Repair Procedures: Step-by-step instructions for component removal, overhaul, and reinstallation for all major vehicle systems. Performance Tuning: Carburetor synchronization and tuning, ignition timing adjustments, advice on performance upgrades (though primarily focused on stock specifications). Overhaul Instructions: Detailed guides for complete engine and transmission rebuilds. Technical Depth Diagnostic Capabilities: Advanced diagnostic procedures for electrical systems, including resistance measurements, voltage checks, and continuity testing. Torque Specifications: Precise torque values for all critical fasteners throughout the motorcycle. Clearances And Tolerances: Specifications for valve clearances, piston-to-cylinder clearance, bearing clearances, and other critical engine tolerances. Wiring Diagrams: Comprehensive and clear electrical wiring diagrams for all applicable models and variations. Special Tool Requirements: Identification of specialized tools required for certain repair and maintenance procedures. 📊 Manual Specifications File Format File Format: PDF Searchability: Searchable text within the PDF document. Print Quality Image Resolution: High-resolution for clear diagrams and illustrations. Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Four-stroke, horizontally opposed twin-cylinder (Boxer), air-cooled Displacement R80: 797.5 cc (approx.) Displacement R90: 897.1 cc (approx.) Displacement R100: 979.1 cc to 1046.6 cc (depending on specific R100 model) Performance Horsepower R80: Approx. 50 hp (Varies by sub-model and year) Horsepower R90: Approx. 60-70 hp (Varies by sub-model, especially R90S) Horsepower R100: Approx. 65-70 hp (Varies by sub-model and year) Torque R80: Approx. 56 Nm (Varies) Torque R90: Approx. 70 Nm (Varies) Torque R100: Approx. 75-80 Nm (Varies) Fuel System Carburetors: Typically dual Bing constant-velocity carburetors (e.g., 32mm, 36mm, 40mm depending on model and year) Fuel Type: Unleaded gasoline (minimum 90 RON / 87 AKI) Fuel Tank Capacity: Typically 17-24 liters (4.5-6.3 US gallons) 🔧 Transmission Standard Type: 5-speed constant mesh manual gearbox Optional Features: Shaft drive, single dry plate clutch (most models), dual wet plate clutch (later R100RS/RT). Features Gear Ratios: Specific gear ratios are detailed within the manual for each model variant. Clutch Actuation: Hydraulic or cable actuation depending on specific model year and variant. 📐...