🏷️ Basic Information Identification Make: BMW Model: R100 Year: 1980 👋 Introduction Market Position Market Segment: Classic Airhead Boxer Motorcycle Competitive Analysis Competitors: Other contemporary BMW boxer twins, Honda CX series, Moto Guzzi V-twin. Key Features Design Philosophy: Robust engineering, shaft drive, air-cooled boxer engine, timeless design. Reliability: Known for its durability and longevity with proper maintenance. Manual Value Proposition Benefit To Owner: Enables DIY maintenance and repair, saving costs and ensuring quality workmanship. 📋 Manual Details Coverage Areas Engine: Yes Transmission: Yes Chassis: Yes Electrical System: Yes Bodywork: Yes Suspension: Yes Brakes: Yes Wheels Tires: Yes Troubleshooting: Yes Page Count Estimated Pages: 300+ Manual Type Type: Service and Repair Manual Language Language: English Format Format: Downloadable PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Complete overhaul, cylinder head, pistons, crankshaft, camshaft, timing. Engine Fuel System: Carburetor (Dell'Orto PHM 40) tuning, fuel lines, fuel pump. Engine Ignition System: Points, condenser, ignition timing, coil, spark plugs. Transmission Gearbox: Clutch, gearbox internals, shifting mechanism, lubrication. Final Drive: Driveshaft, universal joints, final drive unit, lubrication. Electrical System: Wiring diagrams, battery, charging system (alternator, rectifier), lighting, starter motor. Braking System: Hydraulic brake system, master cylinders, calipers, brake pads, brake fluid. Suspension Front: Telescopic forks, oil levels, seals, springs, steering head bearings. Suspension Rear: Monolever system, shock absorber, swingarm, universal joint lubrication. Wheels And Tires: Wheel balancing, spoke tension, tire types, recommended pressures. Fuel Tank And Seating: Fuel tank removal and installation, seat maintenance. Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug checks, valve clearance adjustments. Troubleshooting: Diagnostic flowcharts for common starting, running, and electrical issues. Engine Rebuild: Step-by-step guides for full engine disassembly and reassembly. Carburetor Rebuild: Detailed instructions for cleaning and rebuilding Dell'Orto PHM 40 carburetors. Brake System Maintenance: Bleeding brakes, replacing pads and fluid, servicing calipers. Fork Seal Replacement: Detailed procedure for replacing front fork oil seals. Electrical Component Testing: Testing alternator output, starter motor function, ignition components. Technical Depth Depth: Comprehensive: Covers routine maintenance, diagnostics, adjustments, and complete overhauls. 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text for quick information retrieval. Print Quality Image Resolution: High-resolution images and diagrams for clarity. Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Type: Air-cooled, four-stroke, horizontally opposed twin-cylinder Displacement: 979 cc Bore X Stroke: 90 mm x 76.4 mm Compression Ratio: 8.2:1 Performance Horsepower: Approx. 65 hp @ 6200 rpm Torque: Approx. 77 Nm (57 lb-ft) @ 4800 rpm Fuel System Carburetors: 2 x Dell'Orto PHM 40 CD (or Bing 32/36mm, depending on exact sub-model/market) Fuel Type: Unleaded gasoline (premium recommended) Engine Oil Oil Type: SAE 20W-50 or 10W-40 motorcycle-specific oil Oil Capacity: Approx. 2.7 liters (2.9 US qt) with filter change 🔧 Transmission Standard Type: 5-speed manual gearbox Optional Optional Gearbox: N/A (all R100 models used 5-speed manual) Features Drive: Shaft drive (via driveshaft and universal joints) Transmission Oil Gearbox Oil Type: SAE 80W-90 GL-5 gear oil Gearbox Oil Capacity: Approx. 0.25 liters (0.26 US qt) Clutch Clutch Type: Single dry plate, diaphragm spring 📐 Dimensions Exterior Length: Approx. 2180 mm (85.8 in) Width: Approx. 800 mm (31.5 in) Height: Approx. 1200 mm (47.2 in) Weights Dry Weight: Approx. 200 kg (441 lbs) Wet Weight: Approx. 220 kg (485 lbs) Fuel Capacity Fuel Tank Capacity: 26 liters (6.9 US gal), including reserve 🛡️ Safety Features Ratings Safety Certifications: Standard motorcycle safety compliance for the era. Active Features Brakes: Dual disc front brakes, single disc rear brakes (hydraulic). Lighting: Halogen headlight, taillight, turn signals. Passive Features Frame: Steel tube frame for rigidity and stability. Windscreen: Optional or standard depending on specific R100 model variant (e.g., R100RT). 💡 Technology Features Infotainment Infotainment System: N/A (Focus on mechanical and electrical systems, no electronic infotainment in the modern sense). 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000 - 5,000 km (1,800 - 3,000 miles) or annually. Valve Adjustment Interval: Every 6,000 - 10,000 km (3,700 - 6,200 miles). Spark Plug Check: Every 3,000 - 5,000 km (1,800 - 3,000 miles). Carburetor Sync: As needed, or during major service intervals. Fluid Specifications Brake Fluid Type: DOT 3 or DOT 4 hydraulic brake fluid. Fork Oil Type: SAE 15W or 20W fork oil (specific weight may vary by owner preference/manual). Known Issues Common Wear Items: Fork seals, clutch plates, exhaust gaskets, steering head bearings, clutch cable. Potential Electrical: Aging wiring insulation, rectifier failures, charging system issues. Recommended Parts Air Filter Part Number: Refer to manual for exact part number based on specific R100 variant. Oil Filter Part Number: Refer to manual for exact part number (e.g., Mann MW 50/1 or equivalent). Spark Plug Part Number: Bosch W 8 AC or NGK B7ES (check manual for exact fitment). 📚 Vehicle History Brand Heritage Brand Legacy: BMW Motorrad, renowned for engineering, quality, and touring motorcycles. Model...