🏷️ Basic Information Identification Make: BMW Model: R100 Model Variants: R100/7, R100S, R100RS, R100RT, R100CS, R100GS, R100R, R100RR, R100T Year Range Covered: 1978-1996 Codes Engine Code Family: M2B100 👋 Introduction Market Position Positioning: The R100 series represented BMW's flagship large-displacement boxer-twin motorcycles, known for their touring capabilities, reliability, and distinctive engineering. Competitive Analysis Competitors: Competed against other large-displacement touring and sport-touring motorcycles of the era, such as Honda Gold Wing, Yamaha XS Eleven, and Moto Guzzi T5. Key Features Engine Design: Air-cooled, four-stroke, horizontally opposed twin-cylinder engine. Drivetrain: Shaft drive for low maintenance and smooth power delivery. Touring Ability: Many R100 models were factory-equipped with fairings and luggage systems, enhancing long-distance comfort. Durability: Renowned for their robust construction and longevity when properly maintained. 📋 Manual Details Coverage Areas Coverage Summary: Comprehensive service and repair for all BMW R100 models from 1978 to 1996. Page Count Estimated Pages: 500+ Manual Type Type: Service and Repair Manual Language Language: English Format Format: Downloadable Digital File (PDF) 📖 Manual Coverage Systems Covered Engine: Overhaul, tuning, diagnostics, fuel system, lubrication, cooling (oil). Transmission: Gearbox rebuild, clutch service, driveshaft maintenance. Chassis: Frame inspection, steering head bearings, swingarm, final drive. Suspension: Front forks (including telescopic and leading-link where applicable), rear shock absorbers, adjustments. Brakes: Front and rear brake systems (disc and drum), hydraulic system, caliper overhaul, bleeding. Electrical System: Ignition system (points and electronic), charging system (alternator, regulator), lighting, starter motor, battery, wiring diagrams. Fuel System: Carburetor tuning and overhaul (Bing), fuel pump, fuel tank, lines. Bodywork: Fairing removal and installation, seat, fuel tank, fenders. Procedures Included Maintenance: Regular servicing, oil changes, filter replacements, spark plug service, lubrication points. Troubleshooting: Diagnostic flowcharts for common performance issues, starting problems, electrical faults. Repair: Step-by-step instructions for component removal, repair, and reinstallation. Adjustments: Valve clearance, ignition timing, carburetor synchronization, brake lever play. Rebuilds: Engine top-end and bottom-end rebuilds, gearbox overhaul, final drive rebuild. Technical Depth Depth Level: Detailed technical specifications and procedures suitable for both DIY enthusiasts and professional mechanics. 📊 Manual Specifications File Format File Type: Portable Document Format (PDF) Searchability: Text-searchable for quick information retrieval. Print Quality Print Readability: Optimized for clear printing, includes high-resolution diagrams. Binding Type Binding: N/A (Digital Download) Paper Type Paper Quality: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, four-stroke boxer twin Displacement: 980 cc (97.5 x 66.6 mm bore/stroke) Compression Ratio: 9.5:1 (varies slightly by model) Performance Horsepower: Approx. 65-70 hp @ 7000-7250 rpm (varies by model and tune) Torque: Approx. 75-80 Nm @ 5000-6000 rpm (varies by model) Fuel System Carburetors: Dual Bing 32mm or 40mm constant-velocity carburetors (model dependent) Fuel Type: Unleaded gasoline, 91+ octane (RON+MON)/2 recommended Lubrication Oil Capacity: Approx. 4 liters (including filter) Oil Specification: SAE 20W-50 or 10W-40 motorcycle-specific oil Ignition Ignition Type: Contact breaker points (early models) or electronic ignition (later models) 🔧 Transmission Standard Gearbox Type: 5-speed constant mesh manual gearbox Optional Drive Type: Shaft drive to rear wheel Features Clutch Type: Single dry plate clutch (earlier) or hydraulically actuated wet multi-plate clutch (later models). Gear Ratios: Specific ratios vary by model, detailed in manual. Final Drive Ratio: Typically 32/11 (2.91:1) or similar, varies by model. 📐 Dimensions Exterior Wheelbase: Approx. 1460-1490 mm (model dependent) Seat Height: Approx. 780-820 mm (model dependent) Weights Dry Weight: Approx. 200-240 kg (model dependent) Gross Vehicle Weight: Approx. 400-450 kg (model dependent) 🛡️ Safety Features Ratings Crash Test Data: N/A (Motorcycle safety is assessed differently than cars, focus is on rider protection and bike stability.) Active Features Braking System: Dual front disc brakes, single rear disc brake (or drum on some older variants). Passive Features Frame Design: Robust steel tube frame, providing rigidity and rider support. 💡 Technology Features Infotainment Infotainment System: Not applicable (focus is on mechanical and functional operation). Driver Assistance Assistance Features: N/A (Pre-modern rider aids era). 🔧 Maintenance Service Intervals Oil Change Interval: Every 5,000-10,000 km or annually, whichever comes first. Valve Adjustment Interval: Every 10,000-20,000 km. Ignition Timing Check: Every 10,000-20,000 km or as needed. Carburetor Sync: Every 10,000-20,000 km or when idle issues arise. Fluid Specifications Brake Fluid: DOT 4 (or DOT 3 for older systems) hydraulic brake fluid. Transmission Oil: GL-5 75W-90 or 80W-90 gear oil. Final Drive Oil: GL-5 75W-90 or 80W-90 gear oil. Known Issues Oil Leaks: Common at cylinder base gaskets, valve covers, and final drive seals due to age and heat cycling. Ignition System: Contact breaker points can wear and require frequent adjustment; electronic ignition upgrades are popular. Carburetor Issues: Bing carburetors can develop sticking slides or worn jets, affecting performance. Swingarm Bearings: Wear can lead to handling instability, requiring periodic inspection and lubrication/replacement. Alternator Brushes: Wear down over time, affecting battery charging. 📚 Vehicle History Brand Heritage Bmw Motorrad: BMW Motorrad has a long and distinguished history dating back to the 1920s, known...