This manual covers the BMW R80 GS and R100 R models, including variants such as the R80GS, R100GS, and R100R, produced between 1978 and 1996. These motorcycles are part of the renowned 'Airhead' platform, celebrated for their robust engineering, reliability, and versatility. The GS models, in particular, are recognized for their adventure touring capabilities, blending on-road comfort with off-road prowess, a testament to a long-standing legacy of quality and durability in motorcycle manufacturing. This comprehensive Service Repair Workshop Manual provides in-depth guidance for owners and technicians. It details all essential maintenance procedures, from routine checks and fluid changes to component-specific repairs and complete engine or gearbox rebuilds. The manual includes step-by-step instructions, diagnostic troubleshooting guides, detailed diagrams, and wiring schematics, all presented in English. Its purpose is to empower users with the knowledge necessary to maintain, repair, and optimize the performance of their BMW R80 GS and R100 R motorcycles, ensuring their longevity and reliability. 🏷️ Basic Information Identification Make: BMW Model: R80 GS / R100 R Model Variants: R80GS, R100GS, R100R Codes Vin Code: N/A (Specific VIN decoders required for individual models) Generation Generation: Airhead platform (covering the significant evolution of these models) 👋 Introduction Market Position Target Audience: Owners with basic mechanical skills, independent repair shops, and professional BMW technicians. Competitive Analysis Value Proposition: Provides dealership-level repair and maintenance information, enabling significant cost savings on common services and repairs. Key Features Content Type: Vehicle-specific, not generic information; includes step-by-step instructions, diagrams, and wiring schematics. Manufacturer Origin: Written by manufacturers, mirroring the content used by authorized dealer service departments. 📋 Manual Details Coverage Areas Years Covered: 1978-1996 Specific Years: 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996 Page Count Estimated Page Count: Extensive (typical workshop manuals for this era are 500+ pages, exact count not provided but implied to be comprehensive) Manual Type Type: Service Repair Workshop Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Internal combustion engine (air-cooled flat-twin, boxer), including disassembly, assembly, inspection, and repair of all components. Fuel System: Carburetor systems (e.g., Bing), fuel pumps, fuel tanks, fuel lines, and related components. Cooling System: Air cooling system management, including oil cooling where applicable (e.g., R100 models). Transmission: Gearbox operation, maintenance, repair, clutch system, and internal components. Drive Train: Final drive, driveshaft, universal joints, rear drive unit, and associated components. Electrical System: Ignition system (points/electronic), charging system (alternator/generator), lighting, starter motor, battery, and wiring harnesses. Braking System: Hydraulic disc brakes (front and rear), brake calipers, master cylinders, brake lines, and related maintenance. Suspension: Front forks (telescopic), rear swingarm, shock absorbers (e.g., Koni, Bilstein depending on model/year), and fork seals. Steering System: Handlebar assembly, steering head bearings, and related components. Bodywork: Frame, fuel tank, fenders, seat, fairings (if equipped), and other body components. Wheels And Tires: Wheel bearing maintenance, spoke adjustment, and tire specifications. Exhaust System: Exhaust headers, mufflers, and mounting components. Procedures Included Maintenance: Routine maintenance, periodic checks, oil changes, filter replacements, spark plug servicing, lubrication points. Repair: Step-by-step repair instructions for all major systems, including engine rebuilds, transmission overhauls, and electrical troubleshooting. Troubleshooting: Advanced troubleshooting guides for diagnosing and resolving common and uncommon problems. Adjustments: Carburetor synchronization, valve clearance adjustments, ignition timing, clutch and brake lever adjustments. Disassembly Assembly: Detailed instructions for removing and reinstalling major components and sub-assemblies. Technical Depth Depth: Comprehensive, covering basic maintenance to complete engine and gearbox rebuilds. Includes diagnostic procedures and specifications for professional technicians. Illustrations Diagrams And Schematics: Detailed diagrams, illustrations, and wiring schematics for clear visual guidance. 📊 Manual Specifications File Format File Type: PDF Print Quality Printability: Printable pages, allowing users to print specific sections as needed for workshop use. Binding Type Binding: N/A (Digital download format) Paper Type Paper Quality: N/A (Digital download format) ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, four-stroke, horizontally opposed twin-cylinder boxer engine. Displacements: Typically 797cc (R80GS) and 980cc (R100GS/R100R). Bore X Stroke: R80GS: 80.0 mm x 78.0 mm; R100GS/R100R: 94.0 mm x 70.7 mm (specifications vary slightly by sub-model/year) Performance Horsepower Range: R80GS: approx. 50 hp; R100GS/R100R: approx. 65-70 hp (dependent on model year and tuning) Torque Range: R80GS: approx. 53 Nm; R100GS/R100R: approx. 70-75 Nm (dependent on model year and tuning) Fuel System Carburetors: Typically dual Bing carburetors (e.g., 32mm or 40mm, depending on model). Ignition System Ignition Type: Mechanical points ignition transitioning to electronic ignition systems over the covered years. 🔧 Transmission Standard Type: 5-speed constant mesh gearbox. Optional Optional Features: N/A (Standard configuration for these models) Features Clutch Type: Single dry plate clutch, operated hydraulically. Fluid Type Gearbox Oil: Typically SAE 90 gear oil (refer to manual for precise BMW specifications and viscosity grades). 📐 Dimensions Exterior Wheelbase: Variable by model, but generally around 1400-1450 mm. Weights Dry Weight: R80GS: approx....